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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
79
GRADE
C
FIX
4
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
95
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

775 ms

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

1.32 s

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

21 ms

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

0.072

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

775 ms

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

1.97 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
15
6 PASS 3 REVIEW 4 FIX
F
Page Weight Budget
Action
7.3 MB transferred, 85 requests
FIX
7.3 MB transferred, 85 requests
Critical::
Page weighs 10.1 MB (7.3 MB transferred)
Warning::
Images are 6.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 6.2 MB
Warning::
JavaScript is 632 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 632 KB
Info::
Fonts are 200 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 200 KB
Info::
85 HTTP requests
Info::
Estimated 1.5 g CO2 per page load
7.3 MB / 2.4 MB budget
7.3 MB transferred
85 requests
1.5 g CO2 per page load
Images 6.2 MiB 85%
JavaScript 632.3 KiB 8%
Other 204.8 KiB 3%
Fonts 200.1 KiB 3%
HTML 70.2 KiB 1%
CSS 27.7 KiB 0%
Other 1.6 KiB 0%
Other 1.1 KiB 0%
Other 859 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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 (7.3 MiB of 7.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
85 resources · 7.3 MB · 228 KB savings available
FIX
85 resources · 7.3 MB · 228 KB savings available
Warning::
Page weight 6.3 MB over 1MB target
Got: 7.3 MB Expected: ≤ 1 MB
Info::
~228 KB of savings available
Warning::
84 third-party resources (100% of weight)
Info::
7 resources over 200KB
85 resources · 7.3 MiB · 84 third-party 6.3 MiB over 1MB target
Image 85% · 6.2 MiB
JavaScript 8% · 632.9 KiB
Other 3% · 205.9 KiB
Font 3% · 200.1 KiB
Document 1% · 70.3 KiB
CSS 0% · 27.7 KiB

~228.3 KiB of savings available

Remove unused JavaScript: 228.3 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.

B
JS Execution Cost
684ms total JS execution
REVIEW
684ms total JS execution
Warning::
https://www.elsevier.com/_next/static/chunks/frame...: 281ms CPU time
Info::
https://www.elsevier.com/: 156ms CPU time
Info::
Unattributable: 137ms CPU time
Info::
https://www.elsevier.com/_next/static/chunks/main-...: 55ms CPU time
Info::
https://www.elsevier.com/_next/static/chunks/pages...: 55ms CPU time
Warning::
Third-party scripts: 684ms (100% of total)

Main Thread Breakdown

Script Evaluation 57% Other 18% Style & Layout 12% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
https://www.elsevier.com/_next/static/chunks/framework-7df8ac3fa81e4099.js281ms261ms6ms3rd
https://www.elsevier.com/156ms29ms4ms3rd
Unattributable137ms4ms0ms3rd
https://www.elsevier.com/_next/static/chunks/main-6766b2277ae2cb65.js55ms49ms4ms3rd
https://www.elsevier.com/_next/static/chunks/pages/_app-5b9d716e4aaa6c5e.js55ms27ms17ms3rd
C
JS Bundles
Action
31 scripts, 228 KB unused
REVIEW
31 scripts, 228 KB unused
Warning::
https://www.elsevier.com/_next/static/chunks/pages...: 87 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-MJC...: 83 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.elsevier.com/_next/static/chunks/7300-...: 37 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.elsevier.com/_next/static/chunks/frame...: 21 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 228 KB
228 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.elsevier.com/_next/static/chunks/pages/_app-5b9d716e4aaa6c5e.js177 KB87 KB (49%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MJCS82W157 KB83 KB (53%)✓3rd
https://www.elsevier.com/_next/static/chunks/7300-08df7600e9ea0ea0.js54 KB37 KB (69%)✓3rd
https://www.elsevier.com/_next/static/chunks/framework-7df8ac3fa81e4099.js57 KB21 KB (36%)✓3rd
https://www.elsevier.com/scripts/remove-no-js-class.js0 KB—✓3rd
https://cdn.cookielaw.org/scripttemplates/202310.1.0/otBannerSdk.js1 KB—✓3rd
https://www.elsevier.com/_next/static/chunks/2888-a43a4ed20100b9a2.js26 KB—✓3rd
https://www.elsevier.com/_next/static/chunks/3125-0cb673c34a780f3d.js18 KB—✓3rd
https://www.elsevier.com/_next/static/chunks/8590-5b5bcf9e91334741.js20 KB—✓3rd
https://www.elsevier.com/_next/static/chunks/2380-4ffad1c359686d3a.js11 KB—✓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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
Image Optimization
24 images, 0 KB saveable
PASS
24 images, 0 KB saveable
Info::
All images are well-optimized
24 images 6.2 MB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
4 fonts (200 KB)
PASS
4 fonts (200 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

200 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 775 ms LCP 1.3 shttps://www.elsevier.com/fonts/National2-Regular.otfNational2-Regular.otf https://www.elsevier.com/fonts/National2-Regular.otf — 70.8 KiB — 66 ms — font-display: swaphttps://www.elsevier.com/fonts/TiemposText-Regular.otfTiemposText-Regular.otf https://www.elsevier.com/fonts/TiemposText-Regular.otf — 45.9 KiB — 78 ms — font-display: swaphttps://www.elsevier.com/fonts/TiemposText-RegularItalic.otfTiemposText-RegularItal... https://www.elsevier.com/fonts/TiemposText-RegularItalic.otf — 46.6 KiB — 87 ms — font-display: swaphttps://www.elsevier.com/fonts/National2-Medium.woff2National2-Medium.woff2 https://www.elsevier.com/fonts/National2-Medium.woff2 — 36.8 KiB — 70 ms — font-display: swap
National2-Regular.otf otf swap
Size 71 KB
Load time 66 ms
Start 418 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
TiemposText-Regular.otf otf swap
Size 46 KB
Load time 78 ms
Start 419 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
TiemposText-RegularItal... otf swap
Size 47 KB
Load time 87 ms
Start 419 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
National2-Medium.woff2 woff2 swap
Size 37 KB
Load time 70 ms
Start 424 ms
Risk FOUT — text flashes from fallback to web font
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 ~49 KB and ~98 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
Network Waterfall
85 requests over 1422ms
INFO
0 ms 500 ms 1.0 s FCP 775 ms LCP 1.3 shttps://elsevier.com// https://elsevier.com/ — 301 — 99 B — 109 ms — h2https://www.elsevier.com/www.elsevier.com/ https://www.elsevier.com/ — 200 — 70.2 KiB — 152 ms — h2https://www.elsevier.com/_next/static/css/3113c2aa3f793f81.csswww.elsevier.com/_next/static/css/3... https://www.elsevier.com/_next/static/css/3113c2aa3f793f81.css — 200 — 21.9 KiB — 82 ms — h2https://www.elsevier.com/_next/static/css/4143dd9c9c2606a6.csswww.elsevier.com/_next/static/css/4... https://www.elsevier.com/_next/static/css/4143dd9c9c2606a6.css — 200 — 5.8 KiB — 61 ms — h2https://images.ctfassets.net/o78em1y1w4i4/6YBp4gkl8iT1X2dsofq1qt/8a1c07e59fcf48dd0633a74f87be389f/HomeHeroBanner_Desktop_OsmosisAI.jpg?fm=webp&w=1920&q=75images.ctfassets.net/o78em1y1w4i4/6... https://images.ctfassets.net/o78em1y1w4i4/6YBp4gkl8iT1X2dsofq1qt/8a1c07e59fcf48dd0633a74f87be389f/HomeHeroBanner_Desktop_OsmosisAI.jpg?fm=webp&w=1920&q=75 — 200 — 83.5 KiB — 80 ms — h2https://www.elsevier.com/_next/static/chunks/webpack-97940a0fda6c899c.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/webpack-97940a0fda6c899c.js — 200 — 2.5 KiB — 99 ms — h2https://www.elsevier.com/_next/static/chunks/framework-7df8ac3fa81e4099.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/framework-7df8ac3fa81e4099.js — 200 — 57.3 KiB — 66 ms — h2https://www.elsevier.com/_next/static/chunks/main-6766b2277ae2cb65.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/main-6766b2277ae2cb65.js — 200 — 45.2 KiB — 89 ms — h2https://www.elsevier.com/_next/static/chunks/pages/_app-5b9d716e4aaa6c5e.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/pages/_app-5b9d716e4aaa6c5e.js — 200 — 177.4 KiB — 108 ms — h2https://www.elsevier.com/_next/static/chunks/e3a86bf8-ffa261a7c8f22119.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/e3a86bf8-ffa261a7c8f22119.js — 200 — 10.3 KiB — 118 ms — h2https://www.elsevier.com/_next/static/chunks/7525-2eea17c3c9bfd022.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/7525-2eea17c3c9bfd022.js — 200 — 13.9 KiB — 67 ms — h2https://www.elsevier.com/_next/static/chunks/2888-a43a4ed20100b9a2.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/2888-a43a4ed20100b9a2.js — 200 — 25.6 KiB — 100 ms — h2https://www.elsevier.com/_next/static/chunks/3125-0cb673c34a780f3d.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/3125-0cb673c34a780f3d.js — 200 — 18.4 KiB — 99 ms — h2https://www.elsevier.com/_next/static/chunks/8590-5b5bcf9e91334741.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/8590-5b5bcf9e91334741.js — 200 — 20.3 KiB — 101 ms — h2https://www.elsevier.com/_next/static/chunks/2380-4ffad1c359686d3a.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/2380-4ffad1c359686d3a.js — 200 — 11.0 KiB — 101 ms — h2https://www.elsevier.com/_next/static/chunks/7300-08df7600e9ea0ea0.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/7300-08df7600e9ea0ea0.js — 200 — 54.1 KiB — 105 ms — h2https://www.elsevier.com/_next/static/chunks/pages/%5B...slug%5D-1c71dd25e21c9e5e.jswww.elsevier.com/_next/static/chunk... https://www.elsevier.com/_next/static/chunks/pages/%5B...slug%5D-1c71dd25e21c9e5e.js — 200 — 890 B — 101 ms — h2https://www.elsevier.com/_next/static/_f_5w4Lg6d66clZpS1Pnx/_buildManifest.jswww.elsevier.com/_next/static/_f_5w... https://www.elsevier.com/_next/static/_f_5w4Lg6d66clZpS1Pnx/_buildManifest.js — 200 — 2.0 KiB — 100 ms — h2https://www.elsevier.com/_next/static/_f_5w4Lg6d66clZpS1Pnx/_ssgManifest.jswww.elsevier.com/_next/static/_f_5w... https://www.elsevier.com/_next/static/_f_5w4Lg6d66clZpS1Pnx/_ssgManifest.js — 200 — 722 B — 100 ms — h2https://www.elsevier.com/images/elsevier-logo-orange.svgwww.elsevier.com/images/elsevier-lo... https://www.elsevier.com/images/elsevier-logo-orange.svg — 200 — 38.6 KiB — 96 ms — h2https://images.ctfassets.net/o78em1y1w4i4/60SL18ZGyAn9Rk7nP53ZhY/40667ea7298d95443c057b6422338ea6/backgroundTextures_01_Desktop.png?fm=webp&w=1920&q=75images.ctfassets.net/o78em1y1w4i4/6... https://images.ctfassets.net/o78em1y1w4i4/60SL18ZGyAn9Rk7nP53ZhY/40667ea7298d95443c057b6422338ea6/backgroundTextures_01_Desktop.png?fm=webp&w=1920&q=75 — 200 — 7.0 KiB — 28 ms — h2https://www.elsevier.com/scripts/remove-no-js-class.jswww.elsevier.com/scripts/remove-no-... https://www.elsevier.com/scripts/remove-no-js-class.js — 200 — 351 B — 95 ms — h2https://www.elsevier.com/scripts/unsupported-browser.jswww.elsevier.com/scripts/unsupporte... https://www.elsevier.com/scripts/unsupported-browser.js — 200 — 649 B — 95 ms — h2https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015 — 200 — 6.9 KiB — 63 ms — h2https://www.elsevier.com/manifest.jsonwww.elsevier.com/manifest.json https://www.elsevier.com/manifest.json — 200 — 859 B — 96 ms — h2data:image/svg+xml;utf8,%3Csvg%20viewBox%3D%220%200%2024%2012%22%20fill%3D%22none%22%20xmlns%3D%22h…data:image/svg+xml;utf8,%3Csvg%20vi... data:image/svg+xml;utf8,%3Csvg%20viewBox%3D%220%200%2024%2012%22%20fill%3D%22none%22%20xmlns%3D%22h… — 200 — 0 B — 0 ms — datadata:image/svg+xml;utf8,%3Csvg%20viewBox%3D%220%200%2012%2012%22%20fill%3D%22none%22%20xmlns%3D%22h…data:image/svg+xml;utf8,%3Csvg%20vi... data:image/svg+xml;utf8,%3Csvg%20viewBox%3D%220%200%2012%2012%22%20fill%3D%22none%22%20xmlns%3D%22h… — 200 — 0 B — 0 ms — datahttps://images.ctfassets.net/o78em1y1w4i4/53WOEdrhBDavBIQghOoJKO/0e70392909d347cd75fac7775dcbd507/HomeHeroBanner_Desktop_CKAI.jpg?fm=webp&w=1920&q=75images.ctfassets.net/o78em1y1w4i4/5... https://images.ctfassets.net/o78em1y1w4i4/53WOEdrhBDavBIQghOoJKO/0e70392909d347cd75fac7775dcbd507/HomeHeroBanner_Desktop_CKAI.jpg?fm=webp&w=1920&q=75 — 200 — 58.1 KiB — 54 ms — h2https://images.ctfassets.net/o78em1y1w4i4/3sVBpNetlt06ibmuPWKnBw/ae824ded0c6981f51b210d3b43e218a6/Homepage-hero-LeapSpace-launch-landscape.jpg?fm=webp&w=1920&q=75images.ctfassets.net/o78em1y1w4i4/3... https://images.ctfassets.net/o78em1y1w4i4/3sVBpNetlt06ibmuPWKnBw/ae824ded0c6981f51b210d3b43e218a6/Homepage-hero-LeapSpace-launch-landscape.jpg?fm=webp&w=1920&q=75 — 200 — 59.9 KiB — 47 ms — h2https://images.ctfassets.net/o78em1y1w4i4/1tHW812zK2ClqumvutRUhs/f02060c805191fb8e5bc0fc126eaccc6/Homepage-hero-What-matters-most-landscape.jpg?fm=webp&w=1920&q=75images.ctfassets.net/o78em1y1w4i4/1... https://images.ctfassets.net/o78em1y1w4i4/1tHW812zK2ClqumvutRUhs/f02060c805191fb8e5bc0fc126eaccc6/Homepage-hero-What-matters-most-landscape.jpg?fm=webp&w=1920&q=75 — 200 — 40.7 KiB — 34 ms — h2
0 ms 500 ms 1.0 s FCP 775 ms LCP 1.3 shttps://elsevier.com// https://elsevier.com/ — 301 — 99 B — 109 ms — h2https://www.elsevier.com/www.elsevier.com/ https://www.elsevier.com/ — 200 — 70.2 KiB — 152 ms — h2https://www.elsevier.com/_next/static/css/3113c2aa3f793f81.csswww.elsevier.com/_next/static/css/3... https://www.elsevier.com/_next/static/css/3113c2aa3f793f81.css — 200 — 21.9 KiB — 82 ms — h2https://www.elsevier.com/_next/static/css/4143dd9c9c2606a6.csswww.elsevier.com/_next/static/css/4... https://www.elsevier.com/_next/static/css/4143dd9c9c2606a6.css — 200 — 5.8 KiB — 61 ms — h2https://images.ctfassets.net/o78em1y1w4i4/6YBp4gkl8iT1X2dsofq1qt/8a1c07e59fcf48dd0633a74f87be389f/HomeHeroBanner_Desktop_OsmosisAI.jpg?fm=webp&w=1920&q=75images.ctfassets.net/o78em1y1w4i4/6... https://images.ctfassets.net/o78em1y1w4i4/6YBp4gkl8iT1X2dsofq1qt/8a1c07e59fcf48dd0633a74f87be389f/HomeHeroBanner_Desktop_OsmosisAI.jpg?fm=webp&w=1920&q=75 — 200 — 83.5 KiB — 80 ms — 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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 684ms · 350KB · $9/mo
www.elsevier.com
Other
Costly
Execution 281ms
Transfer 57 KB
Unused 36%
Monthly Cost $4/mo
www.elsevier.com
Other
Optional
Execution 156ms
Transfer 70 KB
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 137ms
Transfer 0 KB
Monthly Cost $2/mo
www.elsevier.com
Other
Optional
Execution 55ms
Transfer 45 KB
Monthly Cost $1/mo
www.elsevier.com
Other
Optional
Execution 55ms
Transfer 177 KB
Unused 49%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.elsevier.com adds 281ms and costs ~$4/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

www.elsevier.com takes 281ms 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.

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