Skip to content
https://plosone.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
42
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.87 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

17.46 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

1.50 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

4.21 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

17.46 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
8 PASS 2 REVIEW 5 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.9 MiB of 1.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3341ms total JS execution
FIX
3341ms total JS execution
Warning::
https://js.hs-analytics.net/analytics/177688800000...: 445ms CPU time
Warning::
Unattributable: 327ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-MQQ...: 314ms CPU time
Warning::
https://journals.plos.org/resource/js/defer.js?7a7...: 298ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TP2...: 255ms CPU time
Warning::
Third-party scripts: 3341ms (100% of total)

Main Thread Breakdown

Script Evaluation 66% Script Parsing & Compilation 16% Other 10% Style & Layout 6%
ScriptTotalScriptingParse/CompileParty
https://js.hs-analytics.net/analytics/1776888000000/44092021.js445ms318ms8ms3rd
Unattributable327ms14ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MQQMGF314ms248ms63ms3rd
https://journals.plos.org/resource/js/defer.js?7a7aa422bfb89c594626298ms149ms138ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TP26BH255ms205ms49ms3rd
https://www.googletagmanager.com/gtag/js?id=G-QC8WLNV09G&cx=c&gtm=4e64k0247ms161ms43ms3rd
https://journals.plos.org/plosone/230ms139ms8ms3rd
https://www.googletagmanager.com/gtag/js?id=G-TJKG55MN8J&cx=c&gtm=4e64k0222ms182ms38ms3rd
https://www.googletagmanager.com/gtag/js?id=G-EJPREQGMKT&cx=c&gtm=4e64k0207ms159ms46ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-11124076945&cx=c&gtm=4e64k0183ms146ms35ms3rd

Showing top 10 of 15 scripts

F
JS Bundles
Action
30 scripts, 599 KB unused
FIX
30 scripts, 599 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-EJPR...: 73 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-QC8W...: 70 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-TJKG...: 70 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-111...: 65 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-111...: 64 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 599 KB
599 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-EJPREQGMKT&cx=c&gtm=4e64k0174 KB73 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-QC8WLNV09G&cx=c&gtm=4e64k0169 KB70 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-TJKG55MN8J&cx=c&gtm=4e64k0175 KB70 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-11128208251&cx=c&gtm=4e64k0145 KB65 KB (45%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-11124076945&cx=c&gtm=4e64k0139 KB64 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-17421501988&cx=c&gtm=4e64k0140 KB64 KB (45%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MQQMGF157 KB63 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TP26BH141 KB56 KB (39%)✓3rd
https://journals.plos.org/resource/js/defer.js?7a7aa422bfb89c594626313 KB52 KB (17%)✓3rd
https://journals.plos.org/resource/js/vendor/jquery-ui.min.js25 KB21 KB (85%)✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
Page Weight Inventory
Action
59 resources · 1.9 MB · 599 KB savings available
FIX
59 resources · 1.9 MB · 599 KB savings available
Warning::
Page weight 967 KB over 1MB target
Got: 1.9 MB Expected: ≤ 1 MB
Info::
~599 KB of savings available
Warning::
58 third-party resources (100% of weight)
Info::
1 resources over 200KB
59 resources · 1.9 MiB · 58 third-party 967.1 KiB over 1MB target
JavaScript 90% · 1.8 MiB
Image 4% · 87.3 KiB
Font 4% · 81.8 KiB
Document 1% · 15.8 KiB
CSS 0% · 8.1 KiB
Other 0% · 2.5 KiB

~598.6 KiB of savings available

Remove unused JavaScript: 598.6 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Page Weight Budget
Action
1.9 MB transferred, 59 requests
REVIEW
1.9 MB transferred, 59 requests
Info::
Page weighs 6.0 MB (1.9 MB transferred)
Warning::
JavaScript is 1.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.8 MB
Info::
59 HTTP requests
Info::
Estimated 0.41 g CO2 per page load
1.9 MB / 2.4 MB budget
1.9 MB transferred
59 requests
0.41 g CO2 per page load
JavaScript 1.8 MiB 90%
Images 86.9 KiB 4%
Fonts 81.8 KiB 4%
HTML 15.4 KiB 1%
CSS 8.1 KiB 0%
Other 1.9 KiB 0%
Other 1.1 KiB 0%
Other 370 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

B
Image Optimization
8 images, 0 KB saveable
REVIEW
8 images, 0 KB saveable
Warning::
https://journals.plos.org/resource/img/logo-plos-f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
8 images 87 KB
0 oversized -0 KB
7 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
1 fonts (82 KB)
PASS
1 fonts (82 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

82 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 2.9 s LCP 17.5 shttps://journals.plos.org/resource/fonts/fontawesome-webfont.woff?v=4.1.0fontawesome-webfont.woff https://journals.plos.org/resource/fonts/fontawesome-webfont.woff?v=4.1.0 — 81.8 KiB — 118 ms — font-display: swap
fontawesome-webfont.woff woff swap
Size 82 KB
Load time 118 ms
Start 837 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~25 KB and ~50 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
59 requests over 1793ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 2.9 s LCP 17.5 shttps://plosone.org// https://plosone.org/ — 301 — 381 B — 62 ms — h2https://journals.plos.org/plosonejournals.plos.org/plosone https://journals.plos.org/plosone — 302 — 314 B — 158 ms — h2https://journals.plos.org/plosone/journals.plos.org/plosone/ https://journals.plos.org/plosone/ — 200 — 15.4 KiB — 140 ms — h2https://journals.plos.org/resource/css/base.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/base... https://journals.plos.org/resource/css/base.css?460ce76d110431694cece1ea536cc950 — 200 — 914 B — 115 ms — h3https://journals.plos.org/resource/css/interface.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/inte... https://journals.plos.org/resource/css/interface.css?460ce76d110431694cece1ea536cc950 — 200 — 4.0 KiB — 121 ms — h3https://journals.plos.org/resource/css/mobile.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/mobi... https://journals.plos.org/resource/css/mobile.css?460ce76d110431694cece1ea536cc950 — 200 — 2.3 KiB — 120 ms — h3https://journals.plos.org/resource/css/plos-interface.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/plos... https://journals.plos.org/resource/css/plos-interface.css?460ce76d110431694cece1ea536cc950 — 200 — 283 B — 121 ms — h3https://journals.plos.org/resource/css/plos-mobile.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/plos... https://journals.plos.org/resource/css/plos-mobile.css?460ce76d110431694cece1ea536cc950 — 200 — 218 B — 123 ms — h3https://journals.plos.org/resource/css/mobile/one/branding.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/mobi... https://journals.plos.org/resource/css/mobile/one/branding.css?460ce76d110431694cece1ea536cc950 — 200 — 457 B — 126 ms — h3https://journals.plos.org/resource/js/sync.js?7a7aa422bfb89c594626journals.plos.org/resource/js/sync.... https://journals.plos.org/resource/js/sync.js?7a7aa422bfb89c594626 — 200 — 1.4 KiB — 129 ms — h3https://journals.plos.org/resource/js/vendor/vendor.min.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/vendor.min.js — 200 — 5.5 KiB — 125 ms — h3https://journals.plos.org/resource/js/vendor/jquery.min.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/jquery.min.js — 200 — 28.8 KiB — 147 ms — h3https://journals.plos.org/resource/js/vendor/jquery-ui.min.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/jquery-ui.min.js — 200 — 24.9 KiB — 144 ms — h3https://journals.plos.org/resource/js/vendor/underscore-min.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/underscore-min.js — 200 — 5.6 KiB — 131 ms — h3https://journals.plos.org/resource/js/vendor/underscore.string.min.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/underscore.string.min.js — 200 — 6.5 KiB — 129 ms — h3https://journals.plos.org/resource/img/logo-plos-footer.pngjournals.plos.org/resource/img/logo... https://journals.plos.org/resource/img/logo-plos-footer.png — 200 — 20.2 KiB — 151 ms — h3https://journals.plos.org/resource/js/vendor/moment.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/moment.js — 200 — 10.8 KiB — 153 ms — h3https://journals.plos.org/resource/js/navigation.jsjournals.plos.org/resource/js/navig... https://journals.plos.org/resource/js/navigation.js — 200 — 1.6 KiB — 114 ms — h3https://journals.plos.org/resource/js/content.jsjournals.plos.org/resource/js/conte... https://journals.plos.org/resource/js/content.js — 200 — 1.9 KiB — 114 ms — h3https://journals.plos.org/resource/js/share.jsjournals.plos.org/resource/js/share... https://journals.plos.org/resource/js/share.js — 200 — 1.3 KiB — 117 ms — h3https://journals.plos.org/resource/js/taxonomy.jsjournals.plos.org/resource/js/taxon... https://journals.plos.org/resource/js/taxonomy.js — 200 — 833 B — 117 ms — h3https://journals.plos.org/resource/js/util/utils.jsjournals.plos.org/resource/js/util/... https://journals.plos.org/resource/js/util/utils.js — 200 — 725 B — 118 ms — h3https://journals.plos.org/resource/js/defer.js?7a7aa422bfb89c594626journals.plos.org/resource/js/defer... https://journals.plos.org/resource/js/defer.js?7a7aa422bfb89c594626 — 200 — 313.4 KiB — 165 ms — h3https://js.hs-scripts.com/44092021.jsjs.hs-scripts.com/44092021.js https://js.hs-scripts.com/44092021.js — 200 — 1.1 KiB — 92 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-TP26BHwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-TP26BH — 200 — 141.4 KiB — 162 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-MQQMGFwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-MQQMGF — 200 — 157.4 KiB — 142 ms — h2https://js.hs-banner.com/v2/44092021/banner.jsjs.hs-banner.com/v2/44092021/banner... https://js.hs-banner.com/v2/44092021/banner.js — 200 — 25.9 KiB — 124 ms — h2https://js.hsadspixel.net/pixels.jsjs.hsadspixel.net/pixels.js https://js.hsadspixel.net/pixels.js — 200 — 3.9 KiB — 99 ms — h2https://js.hs-analytics.net/analytics/1776888000000/44092021.jsjs.hs-analytics.net/analytics/17768... https://js.hs-analytics.net/analytics/1776888000000/44092021.js — 200 — 42.3 KiB — 105 ms — h2https://js.hubspot.com/web-interactives-embed.jsjs.hubspot.com/web-interactives-emb... https://js.hubspot.com/web-interactives-embed.js — 200 — 27.9 KiB — 110 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 2.9 s LCP 17.5 shttps://plosone.org// https://plosone.org/ — 301 — 381 B — 62 ms — h2https://journals.plos.org/plosonejournals.plos.org/plosone https://journals.plos.org/plosone — 302 — 314 B — 158 ms — h2https://journals.plos.org/plosone/journals.plos.org/plosone/ https://journals.plos.org/plosone/ — 200 — 15.4 KiB — 140 ms — h2https://journals.plos.org/resource/css/base.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/base... https://journals.plos.org/resource/css/base.css?460ce76d110431694cece1ea536cc950 — 200 — 914 B — 115 ms — h3https://journals.plos.org/resource/css/interface.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/inte... https://journals.plos.org/resource/css/interface.css?460ce76d110431694cece1ea536cc950 — 200 — 4.0 KiB — 121 ms — h3https://journals.plos.org/resource/css/mobile.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/mobi... https://journals.plos.org/resource/css/mobile.css?460ce76d110431694cece1ea536cc950 — 200 — 2.3 KiB — 120 ms — h3https://journals.plos.org/resource/css/plos-interface.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/plos... https://journals.plos.org/resource/css/plos-interface.css?460ce76d110431694cece1ea536cc950 — 200 — 283 B — 121 ms — h3https://journals.plos.org/resource/css/plos-mobile.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/plos... https://journals.plos.org/resource/css/plos-mobile.css?460ce76d110431694cece1ea536cc950 — 200 — 218 B — 123 ms — h3https://journals.plos.org/resource/css/mobile/one/branding.css?460ce76d110431694cece1ea536cc950journals.plos.org/resource/css/mobi... https://journals.plos.org/resource/css/mobile/one/branding.css?460ce76d110431694cece1ea536cc950 — 200 — 457 B — 126 ms — h3https://journals.plos.org/resource/js/sync.js?7a7aa422bfb89c594626journals.plos.org/resource/js/sync.... https://journals.plos.org/resource/js/sync.js?7a7aa422bfb89c594626 — 200 — 1.4 KiB — 129 ms — h3https://journals.plos.org/resource/js/vendor/vendor.min.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/vendor.min.js — 200 — 5.5 KiB — 125 ms — h3https://journals.plos.org/resource/js/vendor/jquery.min.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/jquery.min.js — 200 — 28.8 KiB — 147 ms — h3https://journals.plos.org/resource/js/vendor/jquery-ui.min.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/jquery-ui.min.js — 200 — 24.9 KiB — 144 ms — h3https://journals.plos.org/resource/js/vendor/underscore-min.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/underscore-min.js — 200 — 5.6 KiB — 131 ms — h3https://journals.plos.org/resource/js/vendor/underscore.string.min.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/underscore.string.min.js — 200 — 6.5 KiB — 129 ms — h3https://journals.plos.org/resource/img/logo-plos-footer.pngjournals.plos.org/resource/img/logo... https://journals.plos.org/resource/img/logo-plos-footer.png — 200 — 20.2 KiB — 151 ms — h3https://journals.plos.org/resource/js/vendor/moment.jsjournals.plos.org/resource/js/vendo... https://journals.plos.org/resource/js/vendor/moment.js — 200 — 10.8 KiB — 153 ms — h3https://journals.plos.org/resource/js/navigation.jsjournals.plos.org/resource/js/navig... https://journals.plos.org/resource/js/navigation.js — 200 — 1.6 KiB — 114 ms — h3https://journals.plos.org/resource/js/content.jsjournals.plos.org/resource/js/conte... https://journals.plos.org/resource/js/content.js — 200 — 1.9 KiB — 114 ms — h3https://journals.plos.org/resource/js/share.jsjournals.plos.org/resource/js/share... https://journals.plos.org/resource/js/share.js — 200 — 1.3 KiB — 117 ms — h3https://journals.plos.org/resource/js/taxonomy.jsjournals.plos.org/resource/js/taxon... https://journals.plos.org/resource/js/taxonomy.js — 200 — 833 B — 117 ms — h3https://journals.plos.org/resource/js/util/utils.jsjournals.plos.org/resource/js/util/... https://journals.plos.org/resource/js/util/utils.js — 200 — 725 B — 118 ms — h3https://journals.plos.org/resource/js/defer.js?7a7aa422bfb89c594626journals.plos.org/resource/js/defer... https://journals.plos.org/resource/js/defer.js?7a7aa422bfb89c594626 — 200 — 313.4 KiB — 165 ms — h3https://js.hs-scripts.com/44092021.jsjs.hs-scripts.com/44092021.js https://js.hs-scripts.com/44092021.js — 200 — 1.1 KiB — 92 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-TP26BHwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-TP26BH — 200 — 141.4 KiB — 162 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-MQQMGFwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-MQQMGF — 200 — 157.4 KiB — 142 ms — h2https://js.hs-banner.com/v2/44092021/banner.jsjs.hs-banner.com/v2/44092021/banner... https://js.hs-banner.com/v2/44092021/banner.js — 200 — 25.9 KiB — 124 ms — h2https://js.hsadspixel.net/pixels.jsjs.hsadspixel.net/pixels.js https://js.hsadspixel.net/pixels.js — 200 — 3.9 KiB — 99 ms — h2https://js.hs-analytics.net/analytics/1776888000000/44092021.jsjs.hs-analytics.net/analytics/17768... https://js.hs-analytics.net/analytics/1776888000000/44092021.js — 200 — 42.3 KiB — 105 ms — h2https://js.hubspot.com/web-interactives-embed.jsjs.hubspot.com/web-interactives-emb... https://js.hubspot.com/web-interactives-embed.js — 200 — 27.9 KiB — 110 ms — h2https://journals.plos.org/resource/img/sprites/structure.pngjournals.plos.org/resource/img/spri... https://journals.plos.org/resource/img/sprites/structure.png — 200 — 24.6 KiB — 116 ms — h3https://journals.plos.org/resource/img/one/logo.pngjournals.plos.org/resource/img/one/... https://journals.plos.org/resource/img/one/logo.png — 200 — 39.5 KiB — 129 ms — h3https://journals.plos.org/resource/img/bg/arrow-right.pngjournals.plos.org/resource/img/bg/a... https://journals.plos.org/resource/img/bg/arrow-right.png — 200 — 1.2 KiB — 119 ms — h3data:image/svg+xml;charset=utf-8;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz48c3ZnIHh…data:image/svg+xml;charset=utf-8;ba... data:image/svg+xml;charset=utf-8;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz48c3ZnIHh… — 200 — 0 B — 0 ms — datahttps://journals.plos.org/resource/fonts/fontawesome-webfont.woff?v=4.1.0journals.plos.org/resource/fonts/fo... https://journals.plos.org/resource/fonts/fontawesome-webfont.woff?v=4.1.0 — 200 — 81.8 KiB — 118 ms — h3https://www.googletagmanager.com/gtag/js?id=AW-11128208251&cx=c&gtm=4e64k0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=AW-11128208251&cx=c&gtm=4e64k0 — 200 — 145.3 KiB — 54 ms — h2https://www.googletagmanager.com/gtag/js?id=AW-17421501988&cx=c&gtm=4e64k0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=AW-17421501988&cx=c&gtm=4e64k0 — 200 — 140.4 KiB — 37 ms — h2https://www.googletagmanager.com/gtag/js?id=AW-11124076945&cx=c&gtm=4e64k0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=AW-11124076945&cx=c&gtm=4e64k0 — 200 — 139.1 KiB — 53 ms — h2https://www.googletagmanager.com/gtag/js?id=G-TJKG55MN8J&cx=c&gtm=4e64k0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-TJKG55MN8J&cx=c&gtm=4e64k0 — 200 — 175.0 KiB — 52 ms — h2https://pagead2.googlesyndication.com/ccm/collect?rcb=17&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&scrsrc=www.googletagmanager.com&rnd=1921308621.1776888180&navt=n&npa=1&ep.ads_data_redaction=0&gtm=45He64k0v72123720za200zd72123720xea&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115616986~115938466~115938468~117266401&apve=1&apvf=f&apvc=1&tft=1776888180316&tfd=877pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=17&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&scrsrc=www.googletagmanager.com&rnd=1921308621.1776888180&navt=n&npa=1&ep.ads_data_redaction=0&gtm=45He64k0v72123720za200zd72123720xea&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115616986~115938466~115938468~117266401&apve=1&apvf=f&apvc=1&tft=1776888180316&tfd=877 — 200 — 21 B — 101 ms — h3https://extend.vimeocdn.com/ga4/1519726.jsextend.vimeocdn.com/ga4/1519726.js https://extend.vimeocdn.com/ga4/1519726.js — 200 — 11.8 KiB — 57 ms — h2https://www.googletagmanager.com/gtag/js?id=G-EJPREQGMKT&cx=c&gtm=4e64k0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-EJPREQGMKT&cx=c&gtm=4e64k0 — 200 — 174.2 KiB — 111 ms — h3https://www.googletagmanager.com/gtag/js?id=G-QC8WLNV09G&cx=c&gtm=4e64k0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-QC8WLNV09G&cx=c&gtm=4e64k0 — 200 — 169.3 KiB — 109 ms — h3https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 116 ms — h2https://www.googletagmanager.com/td?id=GTM-TP26BH&v=3&t=t&pid=201819186&gtm=45He64k0v72123719za200zd72123719&seq=1&exp=0~115938466~115938468~117266400&dl=journals.plos.org%2Fplosone%2F&tdp=GTM-TP26BH;2123719;0;0;0&frm=0&rtg=2123719&slo=14&hlo=19&lst=1&bt=0&ct=3&jsp=1~4~5&z=0www.googletagmanager.com/td?id=GTM-... https://www.googletagmanager.com/td?id=GTM-TP26BH&v=3&t=t&pid=201819186&gtm=45He64k0v72123719za200zd72123719&seq=1&exp=0~115938466~115938468~117266400&dl=journals.plos.org%2Fplosone%2F&tdp=GTM-TP26BH;2123719;0;0;0&frm=0&rtg=2123719&slo=14&hlo=19&lst=1&bt=0&ct=3&jsp=1~4~5&z=0 — 204 — 18 B — 52 ms — h3https://js.hs-banner.com/v2/cf-locationjs.hs-banner.com/v2/cf-location https://js.hs-banner.com/v2/cf-location — 200 — 135 B — 66 ms — h2https://pagead2.googlesyndication.com/ccm/collect?rcb=12&frm=0&en=page_view&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&scrsrc=www.googletagmanager.com&rnd=1921308621.1776888180&navt=n&npa=1&gtm=45be64k0v9236374746z872123720za20gzb72123720zd72123720xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938468~117266401&apve=1&apvf=f&apvc=0&tids=AW-17421501988&tid=AW-17421501988&tft=1776888180468&tfd=1029pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=12&frm=0&en=page_view&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&scrsrc=www.googletagmanager.com&rnd=1921308621.1776888180&navt=n&npa=1&gtm=45be64k0v9236374746z872123720za20gzb72123720zd72123720xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938468~117266401&apve=1&apvf=f&apvc=0&tids=AW-17421501988&tid=AW-17421501988&tft=1776888180468&tfd=1029 — 200 — 21 B — 109 ms — h3https://cta-service-cms2.hubspot.com/web-interactives/public/v1/embed/combinedConfigs?portalId=44092021&currentUrl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&isMobile=truecta-service-cms2.hubspot.com/web-in... https://cta-service-cms2.hubspot.com/web-interactives/public/v1/embed/combinedConfigs?portalId=44092021&currentUrl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&isMobile=true — 200 — 1.0 KiB — 166 ms — h2https://pagead2.googlesyndication.com/ccm/collect?rcb=5&frm=0&en=page_view&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&scrsrc=www.googletagmanager.com&rnd=1921308621.1776888180&navt=n&npa=1&gtm=45be64k0v9104996063z872123720za20gzb72123720zd72123720xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938468~117266401~118128922~118463261&apve=1&apvf=f&apvc=0&tids=AW-11124076945&tid=AW-11124076945&tft=1776888180518&tfd=1079pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=5&frm=0&en=page_view&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&scrsrc=www.googletagmanager.com&rnd=1921308621.1776888180&navt=n&npa=1&gtm=45be64k0v9104996063z872123720za20gzb72123720zd72123720xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938468~117266401~118128922~118463261&apve=1&apvf=f&apvc=0&tids=AW-11124076945&tid=AW-11124076945&tft=1776888180518&tfd=1079 — 200 — 21 B — 77 ms — h3https://pagead2.googlesyndication.com/ccm/collect?rcb=2&frm=0&en=page_view&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&scrsrc=www.googletagmanager.com&rnd=1921308621.1776888180&navt=n&npa=1&gtm=45be64k0v9112457792z872123720za20gzb72123720zd72123720xec&gcs=G100&gcd=13p3pPp2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938469~117266400&apve=1&apvf=f&apvc=0&tids=AW-11128208251&tid=AW-11128208251&tft=1776888180667&tfd=1228pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=2&frm=0&en=page_view&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&scrsrc=www.googletagmanager.com&rnd=1921308621.1776888180&navt=n&npa=1&gtm=45be64k0v9112457792z872123720za20gzb72123720zd72123720xec&gcs=G100&gcd=13p3pPp2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938469~117266400&apve=1&apvf=f&apvc=0&tids=AW-11128208251&tid=AW-11128208251&tft=1776888180667&tfd=1228 — 200 — 21 B — 59 ms — h3https://perf-na1.hsforms.com/embed/v3/counters.gif?key=config-loaded-success&value=1perf-na1.hsforms.com/embed/v3/count... https://perf-na1.hsforms.com/embed/v3/counters.gif?key=config-loaded-success&value=1 — 200 — 427 B — 198 ms — h3https://region1.google-analytics.com/g/collect?v=2&tid=G-TJKG55MN8J&gtm=45je64k0v9105114692z872123720za20gzb72123720zd72123720&_p=1776888179975&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&are=1&cid=1888066509.1776888181&frm=0&pscdl=denied&rcb=1&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~117512542&sid=1776888180&sct=1&seg=0&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&dt=PLOS%20One&en=page_view&_fv=1&_nsi=1&_ss=1&ep.content_group=Other&tfd=1282region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-TJKG55MN8J&gtm=45je64k0v9105114692z872123720za20gzb72123720zd72123720&_p=1776888179975&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&are=1&cid=1888066509.1776888181&frm=0&pscdl=denied&rcb=1&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~117512542&sid=1776888180&sct=1&seg=0&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&dt=PLOS%20One&en=page_view&_fv=1&_nsi=1&_ss=1&ep.content_group=Other&tfd=1282 — 204 — 550 B — 128 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-QC8WLNV09G&gtm=45je64k0v877381323z872123719za20gzb72123719zd72123719&_p=1776888179975&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&are=1&cid=1888066509.1776888181&frm=0&pscdl=denied&rcb=6&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266400~117512542~117884344&sid=1776888180&sct=1&seg=0&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&dt=PLOS%20One&en=page_view&_fv=1&_ss=1&tfd=1345region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-QC8WLNV09G&gtm=45je64k0v877381323z872123719za20gzb72123719zd72123719&_p=1776888179975&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&are=1&cid=1888066509.1776888181&frm=0&pscdl=denied&rcb=6&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266400~117512542~117884344&sid=1776888180&sct=1&seg=0&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&dt=PLOS%20One&en=page_view&_fv=1&_ss=1&tfd=1345 — 204 — 48 B — 66 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-EJPREQGMKT&gtm=45je64k0v9104845114z872123719za20gzb72123719zd72123719&_p=1776888179975&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&are=1&cid=1888066509.1776888181&frm=0&pscdl=denied&rcb=4&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266401~117512542~118463262&sid=1776888180&sct=1&seg=0&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&dt=PLOS%20One&en=page_view&_fv=1&_ss=1&tfd=1406region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-EJPREQGMKT&gtm=45je64k0v9104845114z872123719za20gzb72123719zd72123719&_p=1776888179975&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&are=1&cid=1888066509.1776888181&frm=0&pscdl=denied&rcb=4&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266401~117512542~118463262&sid=1776888180&sct=1&seg=0&dl=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&dt=PLOS%20One&en=page_view&_fv=1&_ss=1&tfd=1406 — 204 — 48 B — 51 ms — h2https://js-agent.newrelic.com/nr-spa-1212.min.jsjs-agent.newrelic.com/nr-spa-1212.m... https://js-agent.newrelic.com/nr-spa-1212.min.js — 200 — 15.9 KiB — 26 ms — h2https://track.hubspot.com/__ptq.gif?k=1&sd=412x823&cd=24-bit&cs=UTF-8&ln=en-us&bfp=683dd27c32696f16ae9d34e26d0bbf7f&v=1.1&a=44092021&pu=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&t=PLOS+One&cts=1776888180878&rv=1&vi=19a4b39e61cb62a1be0c2356d64521de&nc=true&ce=false&cc=1track.hubspot.com/__ptq.gif?k=1&sd=... https://track.hubspot.com/__ptq.gif?k=1&sd=412x823&cd=24-bit&cs=UTF-8&ln=en-us&bfp=683dd27c32696f16ae9d34e26d0bbf7f&v=1.1&a=44092021&pu=https%3A%2F%2Fjournals.plos.org%2Fplosone%2F&t=PLOS+One&cts=1776888180878&rv=1&vi=19a4b39e61cb62a1be0c2356d64521de&nc=true&ce=false&cc=1 — 200 — 1.1 KiB — 207 ms — h2https://journals.plos.org/favicon.icojournals.plos.org/favicon.ico https://journals.plos.org/favicon.ico — 404 — 454 B — 113 ms — h3https://bam.nr-data.net/1/cf99e8d2a3?a=402703674&sa=1&v=1212.e95d35c&t=Unnamed%20Transaction&rst=1465&ck=1&ref=https://journals.plos.org/plosone/&be=540&fe=1432&dc=825&af=err,xhr,stn,ins,spa&perf=%7B%22timing%22:%7B%22of%22:1776888179439,%22n%22:0,%22f%22:222,%22dn%22:222,%22dne%22:222,%22c%22:222,%22ce%22:222,%22rq%22:223,%22rp%22:346,%22rpe%22:362,%22dl%22:351,%22di%22:667,%22ds%22:797,%22de%22:826,%22dc%22:1432,%22l%22:1432,%22le%22:1441%7D,%22navigation%22:%7B%7D%7D&jsonp=NREUM.setTokenbam.nr-data.net/1/cf99e8d2a3?a=4027... https://bam.nr-data.net/1/cf99e8d2a3?a=402703674&sa=1&v=1212.e95d35c&t=Unnamed%20Transaction&rst=1465&ck=1&ref=https://journals.plos.org/plosone/&be=540&fe=1432&dc=825&af=err,xhr,stn,ins,spa&perf=%7B%22timing%22:%7B%22of%22:1776888179439,%22n%22:0,%22f%22:222,%22dn%22:222,%22dne%22:222,%22c%22:222,%22ce%22:222,%22rq%22:223,%22rp%22:346,%22rpe%22:362,%22dl%22:351,%22di%22:667,%22ds%22:797,%22de%22:826,%22dc%22:1432,%22l%22:1432,%22le%22:1441%7D,%22navigation%22:%7B%7D%7D&jsonp=NREUM.setToken — 200 — 624 B — 148 ms — http/1.1https://bam.nr-data.net/events/1/cf99e8d2a3?a=402703674&sa=1&v=1212.e95d35c&t=Unnamed%20Transaction&rst=1683&ck=1&ref=https://journals.plos.org/plosone/bam.nr-data.net/events/1/cf99e8d2a3... https://bam.nr-data.net/events/1/cf99e8d2a3?a=402703674&sa=1&v=1212.e95d35c&t=Unnamed%20Transaction&rst=1683&ck=1&ref=https://journals.plos.org/plosone/ — 200 — 370 B — 109 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 3341ms · 1675KB · €36/mo
HubSpot Analytics
Analytics
Costly
Execution 445ms
Transfer 42 KB
Monthly Cost €5/mo
Unattributable
Other
Costly
Execution 327ms
Transfer 0 KB
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 314ms
Transfer 157 KB
Unused 40%
Monthly Cost €3/mo
journals.plos.org
Other
Costly
Execution 298ms
Transfer 313 KB
Unused 17%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 255ms
Transfer 141 KB
Unused 39%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 247ms
Transfer 169 KB
Unused 42%
Monthly Cost €3/mo
journals.plos.org
Other
Costly
Execution 230ms
Transfer 15 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Costly
Execution 222ms
Transfer 175 KB
Unused 40%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Costly
Execution 207ms
Transfer 174 KB
Unused 42%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 183ms
Transfer 139 KB
Unused 46%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 177ms
Transfer 140 KB
Unused 45%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 175ms
Transfer 145 KB
Unused 45%
Monthly Cost €2/mo
journals.plos.org
Other
Optional
Execution 150ms
Transfer 29 KB
Monthly Cost €2/mo
journals.plos.org
Other
Optional
Execution 58ms
Transfer 5 KB
Monthly Cost €1/mo
js.hubspot.com
Other
Optional
Execution 55ms
Transfer 28 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • HubSpot Analytics adds 445ms and costs ~€5/month
  • Unattributable adds 327ms and costs ~€4/month
  • Google Tag Manager adds 314ms and costs ~€3/month
  • journals.plos.org adds 298ms and costs ~€3/month
  • Google Tag Manager adds 255ms and costs ~€3/month
  • Google Tag Manager adds 247ms and costs ~€3/month
  • journals.plos.org adds 230ms and costs ~€2/month
  • Google Tag Manager adds 222ms and costs ~€2/month
  • Google Tag Manager adds 207ms and costs ~€2/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

HubSpot Analytics takes 445ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 327ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 314ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

journals.plos.org takes 298ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 255ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 247ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

journals.plos.org takes 230ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 222ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 207ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback