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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
55
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
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.
92
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.

1.15 s

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

1.64 s

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

273 ms

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

0.395

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

3.16 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.

6.87 s

Page Load Progression

443 ms
886 ms
1.3 s
1.8 s
2.2 s
2.7 s
3.1 s
3.5 s
Checks
15
6 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
4.0 MB transferred, 191 requests
FIX
4.0 MB transferred, 191 requests
Critical::
Page weighs 10.7 MB (4.0 MB transferred)
Warning::
JavaScript is 2.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.0 MB
Warning::
Images are 1.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.6 MB
Warning::
191 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.83 g CO2 per page load
4.0 MB / 2.4 MB budget
4.0 MB transferred
191 requests
0.83 g CO2 per page load
JavaScript 2.0 MiB 51%
Images 1.6 MiB 40%
Other 93.1 KiB 2%
Fonts 90.8 KiB 2%
CSS 65.8 KiB 2%
Other 51.0 KiB 1%
HTML 33.8 KiB 1%
Other 28.0 KiB 1%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

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 (4.0 MiB of 4.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2095ms total JS execution
FIX
2095ms total JS execution
Warning::
Unattributable: 474ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-MKV...: 427ms CPU time
Warning::
https://www.popsci.com/: 384ms CPU time
Info::
https://cdn.intergient.com/pageos/V.20260416.1/mai...: 186ms CPU time
Info::
https://cdn.privacy-mgmt.com/unified/wrapperMessag...: 121ms CPU time
Warning::
Third-party scripts: 2095ms (100% of total)

Main Thread Breakdown

Script Evaluation 61% Other 15% Script Parsing & Compilation 10% Style & Layout 8%
ScriptTotalScriptingParse/CompileParty
Unattributable474ms145ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MKVW68D427ms392ms19ms3rd
https://www.popsci.com/384ms73ms3ms3rd
https://cdn.intergient.com/pageos/V.20260416.1/main.121b53b8564b55f13382.js186ms156ms19ms3rd
https://cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js121ms105ms5ms3rd
https://www.googletagmanager.com/gtag/js?id=G-P9C278278B&cx=c&gtm=4e64h1120ms103ms17ms3rd
https://cdn.intergient.com/prebid/prebid.05eaa3284c60ad6e334d.js83ms54ms23ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js82ms53ms20ms3rd
https://c.amazon-adsystem.com/aax2/apstag.js81ms59ms18ms3rd
https://assets.bounceexchange.com/assets/smart-tag/versioned/main-v2_567848e754a175dbe621932e8f6a1b7e.br.js68ms41ms27ms3rd

Showing top 10 of 11 scripts

F
JS Bundles
Action
59 scripts, 858 KB unused
FIX
59 scripts, 858 KB unused
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 129 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://imasdk.googleapis.com/js/sdkloader/ima3.js: 110 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.intergient.com/prebid/prebid.05eaa3284...: 97 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.intergient.com/pageos/V.20260416.1/mai...: 92 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.bounceexchange.com/assets/smart-tag...: 86 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 858 KB
858 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js188 KB129 KB (69%)✓3rd
https://imasdk.googleapis.com/js/sdkloader/ima3.js147 KB110 KB (75%)✓3rd
https://cdn.intergient.com/prebid/prebid.05eaa3284c60ad6e334d.js222 KB97 KB (44%)✓3rd
https://cdn.intergient.com/pageos/V.20260416.1/main.121b53b8564b55f13382.js172 KB92 KB (54%)✓3rd
https://assets.bounceexchange.com/assets/smart-tag/versioned/main-v2_567848e754a175dbe621932e8f6a1b7e.br.js116 KB86 KB (74%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-P9C278278B&cx=c&gtm=4e64h1170 KB65 KB (38%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MKVW68D156 KB61 KB (39%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-56LB8GM&gtm=4e64h1132 KB58 KB (44%)✓3rd
https://d2qlq4kdetaeuz.cloudfront.net/eyewise-id-module/eyewise-module-consent.js?token=dGVzdHRva2VuOg==64 KB42 KB (65%)✓3rd
https://c.amazon-adsystem.com/aax2/apstag.js91 KB40 KB (44%)✓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
191 resources · 4.0 MB · 858 KB savings available
FIX
191 resources · 4.0 MB · 858 KB savings available
Warning::
Page weight 3.0 MB over 1MB target
Got: 4.0 MB Expected: ≤ 1 MB
Info::
~858 KB of savings available
Warning::
190 third-party resources (100% of weight)
Info::
4 resources over 200KB
191 resources · 4.0 MiB · 190 third-party 3.0 MiB over 1MB target
JavaScript 51% · 2.0 MiB
Image 40% · 1.6 MiB
Other 4% · 164.2 KiB
Font 2% · 90.8 KiB
CSS 2% · 65.8 KiB
Document 1% · 34.4 KiB

~857.6 KiB of savings available

Remove unused JavaScript: 857.6 KiB
B
Image Optimization
29 images, 0 KB saveable
REVIEW
29 images, 0 KB saveable
Warning::
https://www.popsci.com/wp-content/uploads/2024/05/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
29 images 1.6 MB
0 oversized -0 KB
8 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

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+
Font Loading
4 fonts (91 KB)
PASS
4 fonts (91 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

91 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 1.5 s 2.0 s FCP 1.2 s LCP 1.6 shttps://fonts.gstatic.com/s/barlowcondensed/v13/HTx3L3I-JCGChYJ8VI-L6OO_au7B6xHT2lv0tKk.woff2HTx3L3I-JCGChYJ8VI-L6OO... https://fonts.gstatic.com/s/barlowcondensed/v13/HTx3L3I-JCGChYJ8VI-L6OO_au7B6xHT2lv0tKk.woff2 — 14.4 KiB — 32 ms — font-display: swaphttps://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B46r2z3bWuYMBYro.woff2HTxwL3I-JCGChYJ8VI-L6OO... https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B46r2z3bWuYMBYro.woff2 — 14.6 KiB — 10 ms — font-display: swaphttps://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2UcC73FwrK3iLTeHuS_nVMrM... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 47.3 KiB — 17 ms — font-display: swaphttps://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B4873z3bWuYMBYro.woff2HTxwL3I-JCGChYJ8VI-L6OO... https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B4873z3bWuYMBYro.woff2 — 14.5 KiB — 18 ms — font-display: swap
HTx3L3I-JCGChYJ8VI-L6OO... woff2 swap
Size 14 KB
Load time 32 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
HTxwL3I-JCGChYJ8VI-L6OO... woff2 swap
Size 15 KB
Load time 10 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
UcC73FwrK3iLTeHuS_nVMrM... woff2 swap
Size 47 KB
Load time 17 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
HTxwL3I-JCGChYJ8VI-L6OO... woff2 swap
Size 15 KB
Load time 18 ms
Start 2.3 s
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)
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
HTTP Caching
max-age=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: max-age=3600
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=3600

DirectiveValueMeaning
max-age3600Cache for 1 hour
Effective TTL: 3600 seconds
Network Waterfall
191 requests over 9800ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 1.2 s LCP 1.6 shttps://popsci.com// https://popsci.com/ — 301 — 159 B — 407 ms — h2https://www.popsci.com/www.popsci.com/ https://www.popsci.com/ — 200 — 27.7 KiB — 1.6 s — h2https://www.popsci.com/wp-content/uploads/2021/03/06/pop-sci-logo-default.jpg?w=1152&h=691www.popsci.com/wp-content/uploads/2... https://www.popsci.com/wp-content/uploads/2021/03/06/pop-sci-logo-default.jpg?w=1152&h=691 — 200 — 7.6 KiB — 15 ms — h2https://www.popsci.com/_static/??/wp-content/client-mu-plugins/recurrent/dist/css/frontend.css,/wp-content/themes/popsci/css/app.css?m=1776790973www.popsci.com/_static/??/wp-conten... https://www.popsci.com/_static/??/wp-content/client-mu-plugins/recurrent/dist/css/frontend.css,/wp-content/themes/popsci/css/app.css?m=1776790973 — 200 — 52.6 KiB — 16 ms — h2https://fonts.googleapis.com/css2?family=Barlow+Condensed%3Aital%2Cwght%400%2C400%3B0%2C600%3B0%2C700%3B1%2C400%3B1%2C600%3B1%2C700&display=swap&ver=0.1.0fonts.googleapis.com/css2?family=Ba... https://fonts.googleapis.com/css2?family=Barlow+Condensed%3Aital%2Cwght%400%2C400%3B0%2C600%3B0%2C700%3B1%2C400%3B1%2C600%3B1%2C700&display=swap&ver=0.1.0 — 200 — 779 B — 128 ms — h2https://fonts.googleapis.com/css2?family=Inter%3Awght%40100..900&display=swap&ver=0.1.0fonts.googleapis.com/css2?family=In... https://fonts.googleapis.com/css2?family=Inter%3Awght%40100..900&display=swap&ver=0.1.0 — 200 — 1.1 KiB — 119 ms — h2https://fonts.googleapis.com/css2?family=IBM+Plex+Mono%3Aital%2Cwght%400%2C400%3B0%2C600%3B0%2C700%3B1%2C400%3B1%2C600%3B1%2C700&display=swap&ver=0.1.0fonts.googleapis.com/css2?family=IB... https://fonts.googleapis.com/css2?family=IBM+Plex+Mono%3Aital%2Cwght%400%2C400%3B0%2C600%3B0%2C700%3B1%2C400%3B1%2C600%3B1%2C700&display=swap&ver=0.1.0 — 200 — 964 B — 377 ms — h2https://www.popsci.com/_static/??/wp-content/plugins/sailthru-widget/css/widget.subscribe.css,/wp-content/client-mu-plugins/recurrent/dist/css/youtube-lightbox.css?m=1776790973www.popsci.com/_static/??/wp-conten... https://www.popsci.com/_static/??/wp-content/plugins/sailthru-widget/css/widget.subscribe.css,/wp-content/client-mu-plugins/recurrent/dist/css/youtube-lightbox.css?m=1776790973 — 200 — 1.4 KiB — 19 ms — h2https://www.popsci.com/wp-content/plugins/nelio-ab-testing/assets/dist/js/visitor-type.js?m=1776790973gwww.popsci.com/wp-content/plugins/n... https://www.popsci.com/wp-content/plugins/nelio-ab-testing/assets/dist/js/visitor-type.js?m=1776790973g — 200 — 924 B — 40 ms — h2https://www.popsci.com/_static/??-eJx9zEEKgCAQheELZVMESYvoLFKDjehUOhLdPoMWrYIH/+bjwbkr4tnnBRO4siNjvN7Ugbh2qYI/pALZaAS/eN5YkAV2ny1xgmTIyxqzOmmxKM+HGFv0FMZW614PzaA7dwPBfTOZwww.popsci.com/_static/??-eJx9zEEKg... https://www.popsci.com/_static/??-eJx9zEEKgCAQheELZVMESYvoLFKDjehUOhLdPoMWrYIH/+bjwbkr4tnnBRO4siNjvN7Ugbh2qYI/pALZaAS/eN5YkAV2ny1xgmTIyxqzOmmxKM+HGFv0FMZW614PzaA7dwPBfTOZ — 200 — 35.0 KiB — 37 ms — h2https://experiments.parsely.com/vip-experiments.js?apiKey=popsci.com&ver=3.23.1experiments.parsely.com/vip-experim... https://experiments.parsely.com/vip-experiments.js?apiKey=popsci.com&ver=3.23.1 — 200 — 8.9 KiB — 45 ms — h2https://www.popsci.com/wp-content/plugins/sailthru-widget/js/widget.subscribe.min.js?m=1776790973gwww.popsci.com/wp-content/plugins/s... https://www.popsci.com/wp-content/plugins/sailthru-widget/js/widget.subscribe.min.js?m=1776790973g — 200 — 822 B — 22 ms — h2https://www.popsci.com/wp-content/uploads/2024/05/Nav-logo.svg?quality=85www.popsci.com/wp-content/uploads/2... https://www.popsci.com/wp-content/uploads/2024/05/Nav-logo.svg?quality=85 — 200 — 3.0 KiB — 31 ms — h2https://www.popsci.com/wp-content/uploads/2026/04/Curiosity-Mars-Selfie.jpg?w=704&h=396www.popsci.com/wp-content/uploads/2... https://www.popsci.com/wp-content/uploads/2026/04/Curiosity-Mars-Selfie.jpg?w=704&h=396 — 200 — 48.6 KiB — 35 ms — h2https://www.popsci.com/wp-content/uploads/2026/04/logoff.jpg?w=768&h=432www.popsci.com/wp-content/uploads/2... https://www.popsci.com/wp-content/uploads/2026/04/logoff.jpg?w=768&h=432 — 200 — 17.9 KiB — 17 ms — h2https://www.popsci.com/wp-content/uploads/2026/04/bruce-parrot-lead.png?w=768&h=432www.popsci.com/wp-content/uploads/2... https://www.popsci.com/wp-content/uploads/2026/04/bruce-parrot-lead.png?w=768&h=432 — 200 — 482.8 KiB — 32 ms — h2https://www.popsci.com/wp-content/client-mu-plugins/recurrent/dist/js/frontend.js?m=1776790968gwww.popsci.com/wp-content/client-mu... https://www.popsci.com/wp-content/client-mu-plugins/recurrent/dist/js/frontend.js?m=1776790968g — 200 — 19.7 KiB — 6 ms — h2https://www.popsci.com/wp-content/themes/recurrent-base/js/app.js?ver=1776790973www.popsci.com/wp-content/themes/re... https://www.popsci.com/wp-content/themes/recurrent-base/js/app.js?ver=1776790973 — 200 — 23.3 KiB — 6 ms — h2https://www.popsci.com/wp-content/client-mu-plugins/recurrent/dist/js/youtube-lightbox.js?m=1776790968gwww.popsci.com/wp-content/client-mu... https://www.popsci.com/wp-content/client-mu-plugins/recurrent/dist/js/youtube-lightbox.js?m=1776790968g — 200 — 7.9 KiB — 9 ms — h2https://cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.jscdn.privacy-mgmt.com/unified/wrappe... https://cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js — 200 — 42.0 KiB — 27 ms — h2https://www.popsci.com/wp-content/uploads/2021/01/28/popsci_logo-horizontal-white.svg?quality=85&w=128&h=28&crop=1www.popsci.com/wp-content/uploads/2... https://www.popsci.com/wp-content/uploads/2021/01/28/popsci_logo-horizontal-white.svg?quality=85&w=128&h=28&crop=1 — 200 — 1.5 KiB — 10 ms — h2https://btloader.com/tag?o=5150306120761344&upapi=true&ver=0.1btloader.com/tag?o=5150306120761344... https://btloader.com/tag?o=5150306120761344&upapi=true&ver=0.1 — 302 — 235 B — 120 ms — h2https://stats.wp.com/e-202617.jsstats.wp.com/e-202617.js https://stats.wp.com/e-202617.js — 200 — 1.7 KiB — 15 ms — h2https://cdn.intergient.com/1025364/75188/ramp.jscdn.intergient.com/1025364/75188/ra... https://cdn.intergient.com/1025364/75188/ramp.js — 200 — 11.4 KiB — 81 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-MKVW68Dwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-MKVW68D — 200 — 156.4 KiB — 266 ms — h2https://www.popsci.com/wp-content/uploads/2024/09/Screenshot-2024-09-10-at-11.45.00-AM.png?quality=85www.popsci.com/wp-content/uploads/2... https://www.popsci.com/wp-content/uploads/2024/09/Screenshot-2024-09-10-at-11.45.00-AM.png?quality=85 — 200 — 236.4 KiB — 11 ms — h2https://www.popsci.com/wp-content/uploads/2026/04/anker-charging-deals-amazon-spring.jpg?w=280&h=168www.popsci.com/wp-content/uploads/2... https://www.popsci.com/wp-content/uploads/2026/04/anker-charging-deals-amazon-spring.jpg?w=280&h=168 — 200 — 8.2 KiB — 17 ms — h2https://www.popsci.com/wp-content/uploads/2026/04/rei-bag-sale-header.jpg?w=280&h=168www.popsci.com/wp-content/uploads/2... https://www.popsci.com/wp-content/uploads/2026/04/rei-bag-sale-header.jpg?w=280&h=168 — 200 — 10.7 KiB — 21 ms — h2https://www.popsci.com/wp-content/uploads/2026/04/Under-Armour-Velociti-3-stacks-stacked-hero.jpg?w=280&h=187www.popsci.com/wp-content/uploads/2... https://www.popsci.com/wp-content/uploads/2026/04/Under-Armour-Velociti-3-stacks-stacked-hero.jpg?w=280&h=187 — 200 — 6.9 KiB — 30 ms — h2https://www.popsci.com/wp-content/uploads/2026/04/PINTER__Home_Brewers.jpg?w=280&h=212www.popsci.com/wp-content/uploads/2... 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https://sync.crwdcntrl.net/qmap?c=18513&tp=MGNI&tpid=c615ee4e-5916-4e78-a90b-753a406d99d3&d=https%3A%2F%2Fpb-ing-02.ccgateway.net%2Fv1.0%2Fparent%2F5bb3e20859%2Fengagement%2Ftrigger%2Fuser_sync%3Fsrc%3Dlotame%26puid%3D$%7Bprofile_id%7D%26id%3Dwww.popsci.com%26parentId%3D5bb3e20859%26ccsid%3D7a81944d-d29c-4b54-b06e-93bbea8cd277%26ccuid%3Dc615ee4e-5916-4e78-a90b-753a406d99d3%26ccpt%3D0%26pvid%3D5152306e-4348-47c3-a1df-2e225475db4c%26engid%3Dbfb6b158-5658-4a0a-aca1-9179f5e134b6%26engcount%3D0%26engttl%3D60 — 302 — 600 B — 17 ms — h2https://sync.crwdcntrl.net/qmap?c=18513&tp=MGNI&tpid=c615ee4e-5916-4e78-a90b-753a406d99d3&d=https%3A%2F%2Fpb-ing-02.ccgateway.net%2Fv1.0%2Fparent%2F5bb3e20859%2Fengagement%2Ftrigger%2Fuser_sync%3Fsrc%3Dlotame%26puid%3D$%7Bprofile_id%7D%26id%3Dwww.popsci.com%26parentId%3D5bb3e20859%26ccsid%3D7a81944d-d29c-4b54-b06e-93bbea8cd277%26ccuid%3Dc615ee4e-5916-4e78-a90b-753a406d99d3%26ccpt%3D0%26pvid%3D5152306e-4348-47c3-a1df-2e225475db4c%26engid%3Dbfb6b158-5658-4a0a-aca1-9179f5e134b6%26engcount%3D0%26engttl%3D60&ct=ysync.crwdcntrl.net/qmap?c=18513&tp=... https://sync.crwdcntrl.net/qmap?c=18513&tp=MGNI&tpid=c615ee4e-5916-4e78-a90b-753a406d99d3&d=https%3A%2F%2Fpb-ing-02.ccgateway.net%2Fv1.0%2Fparent%2F5bb3e20859%2Fengagement%2Ftrigger%2Fuser_sync%3Fsrc%3Dlotame%26puid%3D$%7Bprofile_id%7D%26id%3Dwww.popsci.com%26parentId%3D5bb3e20859%26ccsid%3D7a81944d-d29c-4b54-b06e-93bbea8cd277%26ccuid%3Dc615ee4e-5916-4e78-a90b-753a406d99d3%26ccpt%3D0%26pvid%3D5152306e-4348-47c3-a1df-2e225475db4c%26engid%3Dbfb6b158-5658-4a0a-aca1-9179f5e134b6%26engcount%3D0%26engttl%3D60&ct=y — 302 — 440 B — 9 ms — h2https://geo.privacymanager.io/geo.privacymanager.io/ https://geo.privacymanager.io/ — 200 — 428 B — 5 ms — h2https://pb-ing-02.ccgateway.net/v1.0/parent/5bb3e20859/engagement/trigger/user_sync?src=lotame&puid=b3baff8f2f68c036a829ffa41b02f44f&id=www.popsci.com&parentId=5bb3e20859&ccsid=7a81944d-d29c-4b54-b06e-93bbea8cd277&ccuid=c615ee4e-5916-4e78-a90b-753a406d99d3&ccpt=0&pvid=5152306e-4348-47c3-a1df-2e225475db4c&engid=bfb6b158-5658-4a0a-aca1-9179f5e134b6&engcount=0&engttl=60pb-ing-02.ccgateway.net/v1.0/parent... https://pb-ing-02.ccgateway.net/v1.0/parent/5bb3e20859/engagement/trigger/user_sync?src=lotame&puid=b3baff8f2f68c036a829ffa41b02f44f&id=www.popsci.com&parentId=5bb3e20859&ccsid=7a81944d-d29c-4b54-b06e-93bbea8cd277&ccuid=c615ee4e-5916-4e78-a90b-753a406d99d3&ccpt=0&pvid=5152306e-4348-47c3-a1df-2e225475db4c&engid=bfb6b158-5658-4a0a-aca1-9179f5e134b6&engcount=0&engttl=60 — 200 — 154 B — 598 ms — h2https://lb.eu-1-id5-sync.com/lb/v1lb.eu-1-id5-sync.com/lb/v1 https://lb.eu-1-id5-sync.com/lb/v1 — 200 — 324 B — 618 ms — h2https://d2qlq4kdetaeuz.cloudfront.net/eyewise-id-module/eyewise-module-consent.js?token=dGVzdHRva2VuOg==d2qlq4kdetaeuz.cloudfront.net/eyewi... https://d2qlq4kdetaeuz.cloudfront.net/eyewise-id-module/eyewise-module-consent.js?token=dGVzdHRva2VuOg== — 200 — 64.2 KiB — 42 ms — h2https://id5-sync.com/api/config/prebidid5-sync.com/api/config/prebid https://id5-sync.com/api/config/prebid — 200 — 448 B — 636 ms — h2https://mug.criteo.com/sid?cpp=czNfoHwyYWZiaFA2Y0FpbFB1T20yNVhoWktTWUc1TG4xVzNzbTc1UXEyeHNpSXN0ZGgyZlB2N2poSnlsVkR4a21pb2lvVVZFQVFqOHpTQXZCT0tScS95Sm1JVGMrRDBpNzduRVdlVzhoS3d6ckY2S1VsZXZsa09NcDU5NkIza0EyalQ0MmR4L3NmNThQeDZOQ0JNd2oraWZCdVZjYy9helZRNkFGTGJCSjJNK0FieEhTK3R6VHVFT2Q0MUR6ZU81ZnN3L3FJd25LWlhMYkw4emU1a1liSWVQZk1rbTJOY2I0YXRLZnhzeDEvYm5SanBtV2FtSlUyd2tXVGFkTWJ3RDkwTzd1fA&cppv=2mug.criteo.com/sid?cpp=czNfoHwyYWZi... https://mug.criteo.com/sid?cpp=czNfoHwyYWZiaFA2Y0FpbFB1T20yNVhoWktTWUc1TG4xVzNzbTc1UXEyeHNpSXN0ZGgyZlB2N2poSnlsVkR4a21pb2lvVVZFQVFqOHpTQXZCT0tScS95Sm1JVGMrRDBpNzduRVdlVzhoS3d6ckY2S1VsZXZsa09NcDU5NkIza0EyalQ0MmR4L3NmNThQeDZOQ0JNd2oraWZCdVZjYy9helZRNkFGTGJCSjJNK0FieEhTK3R6VHVFT2Q0MUR6ZU81ZnN3L3FJd25LWlhMYkw4emU1a1liSWVQZk1rbTJOY2I0YXRLZnhzeDEvYm5SanBtV2FtSlUyd2tXVGFkTWJ3RDkwTzd1fA&cppv=2 — 200 — 0 B — 384 ms — h2https://rp4.liadm.com/j?dtstmp=1776802697501&did=did-0046&se=e30&duid=1201ed3df6d6--01kprv33s4xeqpq6rt56hfmgh3&tv=10.23.0&pu=https%3A%2F%2Fwww.popsci.com%2F&wpn=prebid&gpp_s=DBAA&gpp_as=-1&cd=.popsci.com&i6=MmEwMzo5MGMwOjE4Nzo6MTE%3D&n3pc=truerp4.liadm.com/j?dtstmp=177680269750... https://rp4.liadm.com/j?dtstmp=1776802697501&did=did-0046&se=e30&duid=1201ed3df6d6--01kprv33s4xeqpq6rt56hfmgh3&tv=10.23.0&pu=https%3A%2F%2Fwww.popsci.com%2F&wpn=prebid&gpp_s=DBAA&gpp_as=-1&cd=.popsci.com&i6=MmEwMzo5MGMwOjE4Nzo6MTE%3D&n3pc=true — 200 — 249 B — 380 ms — h2https://pagead2.googlesyndication.com/pagead/ping?e=1pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/ping?e=1 — 204 — 20 B — 110 ms — h3https://mug.criteo.com/sid?cpp=czNfoHwyYWZiaFA2Y0FpbFB1T20yNVhoWktTWUc1TG4xVzNzbTc1UXEyeHNpSXN0ZGgyZlB2N2poSnlsVkR4a21pb2lvVVZFQVFqOHpTQXZCT0tScS95Sm1JVGMrRDBpNzduRVdlVzhoS3d6ckY2S1VsZXZsa09NcDU5NkIza0EyalQ0MmR4L3NmNThQeDZOQ0JNd2oraWZCdVZjYy9helZRNkFGTGJCSjJNK0FieEhTK3R6VHVFT2Q0MUR6ZU81ZnN3L3FJd25LWlhMYkw4emU1a1liSWVQZk1rbTJOY2I0YXRLZnhzeDEvYm5SanBtV2FtSlUyd2tXVGFkTWJ3RDkwTzd1fA&cppv=2mug.criteo.com/sid?cpp=czNfoHwyYWZi... https://mug.criteo.com/sid?cpp=czNfoHwyYWZiaFA2Y0FpbFB1T20yNVhoWktTWUc1TG4xVzNzbTc1UXEyeHNpSXN0ZGgyZlB2N2poSnlsVkR4a21pb2lvVVZFQVFqOHpTQXZCT0tScS95Sm1JVGMrRDBpNzduRVdlVzhoS3d6ckY2S1VsZXZsa09NcDU5NkIza0EyalQ0MmR4L3NmNThQeDZOQ0JNd2oraWZCdVZjYy9helZRNkFGTGJCSjJNK0FieEhTK3R6VHVFT2Q0MUR6ZU81ZnN3L3FJd25LWlhMYkw4emU1a1liSWVQZk1rbTJOY2I0YXRLZnhzeDEvYm5SanBtV2FtSlUyd2tXVGFkTWJ3RDkwTzd1fA&cppv=2 — 200 — 1.1 KiB — 378 ms — h2https://pb-ing-02.ccgateway.net/v1.0/parent/5bb3e20859/engagement/trigger/page_visitpb-ing-02.ccgateway.net/v1.0/parent... https://pb-ing-02.ccgateway.net/v1.0/parent/5bb3e20859/engagement/trigger/page_visit — 200 — 334 B — 200 ms — h2https://id5-sync.com/g/v2/483.jsonid5-sync.com/g/v2/483.json https://id5-sync.com/g/v2/483.json — 200 — 1.6 KiB — 211 ms — h2https://lb.eu-1-id5-sync.com/lb/v1lb.eu-1-id5-sync.com/lb/v1 https://lb.eu-1-id5-sync.com/lb/v1 — -1 — 0 B — 0 ms —
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 2095ms · 1317KB · $28/mo
Unattributable
Other
Costly
Execution 474ms
Transfer 0 KB
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 427ms
Transfer 156 KB
Unused 39%
Monthly Cost $6/mo
www.popsci.com
Other
Costly
Execution 384ms
Transfer 28 KB
Monthly Cost $5/mo
cdn.intergient.com
Other
Optional
Execution 186ms
Transfer 172 KB
Unused 54%
Monthly Cost $2/mo
cdn.privacy-mgmt.com
Other
Optional
Execution 121ms
Transfer 42 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 120ms
Transfer 170 KB
Unused 38%
Monthly Cost $2/mo
cdn.intergient.com
Other
Optional
Execution 83ms
Transfer 222 KB
Unused 44%
Monthly Cost $1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 82ms
Transfer 188 KB
Unused 69%
Monthly Cost $1/mo
c.amazon-adsystem.com
Other
Optional
Execution 81ms
Transfer 91 KB
Unused 44%
Monthly Cost $1/mo
assets.bounceexchange.com
Other
Optional
Execution 68ms
Transfer 116 KB
Unused 74%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 68ms
Transfer 132 KB
Unused 44%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 474ms and costs ~$6/month
  • Google Tag Manager adds 427ms and costs ~$6/month
  • www.popsci.com adds 384ms and costs ~$5/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

Unattributable takes 474ms 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 427ms 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

www.popsci.com takes 384ms 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

54% of cdn.intergient.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

69% of securepubads.g.doubleclick.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

74% of assets.bounceexchange.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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