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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
6
REVIEW
1
PASS
8
INFO
2

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

Mobile Desktop
39
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.
100
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.

4.65 s

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

13.28 s

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

282 ms

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

0.359

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

5.17 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.

13.80 s

Page Load Progression

519 ms
1.0 s
1.6 s
2.1 s
2.6 s
3.1 s
3.6 s
4.2 s
Checks
17
8 PASS 1 REVIEW 6 FIX
D
Page Weight Budget
Action
2.1 MB transferred, 70 requests
FIX
2.1 MB transferred, 70 requests
Info::
Page weighs 6.6 MB (2.1 MB transferred)
Warning::
Images are 1.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.1 MB
Warning::
JavaScript is 651 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 651 KB
Info::
70 HTTP requests
Info::
Estimated 0.44 g CO2 per page load
2.1 MB / 2.4 MB budget
2.1 MB transferred
70 requests
0.44 g CO2 per page load
Images 1.1 MiB 52%
JavaScript 650.9 KiB 31%
Fonts 197.6 KiB 9%
CSS 143.9 KiB 7%
HTML 14.7 KiB 1%
Other 4.6 KiB 0%
Other 1.2 KiB 0%
Other 789 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

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 (2.1 MiB of 2.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2391ms total JS execution
FIX
2391ms total JS execution
Warning::
https://opensource.google/: 832ms CPU time
Warning::
Unattributable: 523ms CPU time
Warning::
https://www.gstatic.com/devrel-devsite/prod/v57907...: 262ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-64EQ...: 260ms CPU time
Info::
https://www.gstatic.com/devrel-devsite/prod/v57907...: 236ms CPU time
Warning::
Third-party scripts: 2391ms (100% of total)

Main Thread Breakdown

Script Evaluation 36% Other 31% Style & Layout 16% Script Parsing & Compilation 8% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://opensource.google/832ms21ms2ms3rd
Unattributable523ms34ms0ms3rd
https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_app_module.js262ms192ms21ms3rd
https://www.googletagmanager.com/gtag/js?id=G-64EQFFKSHW&l=atDataLayer&cx=c&gtm=4e64k0260ms218ms40ms3rd
https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_app_custom_elements_module.js236ms123ms93ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NDV7K7V5&l=atDataLayer183ms150ms31ms3rd
https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_devsite_header_module.js96ms44ms1ms3rd
D
JS Bundles
Action
38 scripts, 314 KB unused
FIX
38 scripts, 314 KB unused
Warning::
https://www.gstatic.com/devrel-devsite/prod/v57907...: 163 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-64EQ...: 62 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NDV...: 61 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/devrel-devsite/prod/v57907...: 28 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 314 KB
314 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_app_custom_elements_module.js303 KB163 KB (54%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-64EQFFKSHW&l=atDataLayer&cx=c&gtm=4e64k0143 KB62 KB (43%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NDV7K7V5&l=atDataLayer132 KB61 KB (46%)✓3rd
https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_app_module.js58 KB28 KB (48%)✓3rd
https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_devsite_language_selector_module.js0 KB—✓3rd
https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_devsite_progress_module.js0 KB—✓3rd
https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_devsite_analytics_module.js0 KB—✓3rd
https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_devsite_badger_module.js0 KB—✓3rd
https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_devsite_book_nav_module.js0 KB—✓3rd
https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_devsite_bookmark_module.js0 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

D
Page Weight Inventory
Action
70 resources · 2.1 MB · 314 KB savings available
FIX
70 resources · 2.1 MB · 314 KB savings available
Warning::
Page weight 1.1 MB over 1MB target
Got: 2.1 MB Expected: ≤ 1 MB
Info::
~314 KB of savings available
Warning::
69 third-party resources (100% of weight)
Info::
2 resources over 200KB
70 resources · 2.1 MiB · 69 third-party 1.1 MiB over 1MB target
Image 52% · 1.1 MiB
JavaScript 31% · 650.9 KiB
Font 9% · 197.6 KiB
CSS 7% · 143.9 KiB
Document 1% · 15.5 KiB
Other 0% · 5.8 KiB

~313.9 KiB of savings available

Remove unused JavaScript: 313.9 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
Image Optimization
Action
14 images, 0 KB saveable
REVIEW
14 images, 0 KB saveable
Warning::
https://opensource.google/static/images/featured-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://opensource.google/static/images/featured-e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://opensource.google/static/images/programs/G... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://opensource.google/static/images/home-proje... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://opensource.google/static/images/os-anim-ma... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
14 images 1.1 MB
0 oversized -0 KB
10 legacy format
5 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

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

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

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

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
3 fonts (198 KB)
PASS
3 fonts (198 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

198 KB total

Render-blocking

0

of 3

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 FCP 4.6 s LCP 13.3 shttps://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff24UasrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff2 — 35.3 KiB — 85 ms — font-display: swaphttps://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2flUhRq6tzZclQEJ-Vdg-Iui... https://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2 — 125.6 KiB — 98 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 84 ms — font-display: swap
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 35 KB
Load time 85 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
flUhRq6tzZclQEJ-Vdg-Iui... woff2 swap
Size 126 KB
Load time 98 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 84 ms
Start 1.1 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)

Fixing the unchecked items could save ~63 KB and ~126 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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
3
preload
—
dns-prefetch
—
prefetch
—

3 resource hints configured

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: Google Cloud

Network Waterfall
70 requests over 3054ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 4.6 s LCP 13.3 shttps://googlesource.com// https://googlesource.com/ — 302 — 234 B — 44 ms — h2https://developers.google.com/open-source/developers.google.com/open-source/ https://developers.google.com/open-source/ — 301 — 555 B — 215 ms — h2https://opensource.google/opensource.google/ https://opensource.google/ — 200 — 14.7 KiB — 326 ms — h2https://fonts.googleapis.com/css?family=Google+Sans:400,500,700|Roboto:400,400italic,500,500italic,700,700italic|Roboto+Mono:400,500,700&display=swapfonts.googleapis.com/css?family=Goo... https://fonts.googleapis.com/css?family=Google+Sans:400,500,700|Roboto:400,400italic,500,500italic,700,700italic|Roboto+Mono:400,500,700&display=swap — 200 — 3.5 KiB — 121 ms — h2https://fonts.googleapis.com/css2?family=Material+Icons&family=Material+Symbols+Outlined&display=blockfonts.googleapis.com/css2?family=Ma... https://fonts.googleapis.com/css2?family=Material+Icons&family=Material+Symbols+Outlined&display=block — 200 — 982 B — 116 ms — h2https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/opensource/css/app.csswww.gstatic.com/devrel-devsite/prod... https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/opensource/css/app.css — 200 — 139.4 KiB — 181 ms — h2https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/opensource/images/lockup.svgwww.gstatic.com/devrel-devsite/prod... https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/opensource/images/lockup.svg — 200 — 3.2 KiB — 105 ms — h2https://opensource.google/static/images/os-anim-main.gifopensource.google/static/images/os-... https://opensource.google/static/images/os-anim-main.gif — 200 — 1.0 MiB — 737 ms — h2https://opensource.google/_pwa/opensource/manifest.jsonopensource.google/_pwa/opensource/m... https://opensource.google/_pwa/opensource/manifest.json — 200 — 1.2 KiB — 29 ms — h2https://opensource.google/static/images/glyph-blue.svgopensource.google/static/images/gly... https://opensource.google/static/images/glyph-blue.svg — 200 — 222 B — 299 ms — h3https://opensource.google/static/images/glyph-yellow.svgopensource.google/static/images/gly... https://opensource.google/static/images/glyph-yellow.svg — 200 — 470 B — 276 ms — h3https://opensource.google/static/images/glyph-green.svgopensource.google/static/images/gly... https://opensource.google/static/images/glyph-green.svg — 200 — 594 B — 659 ms — h3https://opensource.google/static/images/featured-events-icon.svgopensource.google/static/images/fea... https://opensource.google/static/images/featured-events-icon.svg — 200 — 1.0 KiB — 277 ms — h3https://opensource.google/static/images/programs/GSoC-logo-1300x1200_856.pngopensource.google/static/images/pro... https://opensource.google/static/images/programs/GSoC-logo-1300x1200_856.png — 200 — 50.6 KiB — 350 ms — h3https://opensource.google/static/images/home-projects-icon.svgopensource.google/static/images/hom... https://opensource.google/static/images/home-projects-icon.svg — 200 — 959 B — 241 ms — h3https://opensource.google/static/images/featured-blogs-icon.svgopensource.google/static/images/fea... https://opensource.google/static/images/featured-blogs-icon.svg — 200 — 807 B — 273 ms — h3https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/opensource/images/lockup-google-for-developers.svgwww.gstatic.com/devrel-devsite/prod... https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/opensource/images/lockup-google-for-developers.svg — 200 — 2.2 KiB — 36 ms — h2https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff2fonts.gstatic.com/s/googlesans/v67/... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff2 — 200 — 35.3 KiB — 85 ms — h3https://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2fonts.gstatic.com/s/materialicons/v... https://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2 — 200 — 125.6 KiB — 98 ms — h3https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v51/KFO7... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 36.7 KiB — 84 ms — h3https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/opensource/js/app_loader.jswww.gstatic.com/devrel-devsite/prod... https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/opensource/js/app_loader.js — 200 — 12.5 KiB — 34 ms — h2https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_app_module.jswww.gstatic.com/devrel-devsite/prod... https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_app_module.js — 200 — 58.3 KiB — 64 ms — h3https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_app_custom_elements_module.jswww.gstatic.com/devrel-devsite/prod... https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/js/devsite_app_custom_elements_module.js — 200 — 302.6 KiB — 95 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 2391ms · 653KB · €38/mo
opensource.google
Other
Costly
Execution 832ms
Transfer 15 KB
Monthly Cost €13/mo
Unattributable
Other
Costly
Execution 523ms
Transfer 0 KB
Monthly Cost €8/mo
www.gstatic.com
Other
Costly
Execution 262ms
Transfer 58 KB
Unused 48%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 260ms
Transfer 143 KB
Unused 43%
Monthly Cost €4/mo
www.gstatic.com
Other
Costly
Execution 236ms
Transfer 303 KB
Unused 54%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Optional
Execution 183ms
Transfer 132 KB
Unused 46%
Monthly Cost €3/mo
www.gstatic.com
Other
Optional
Execution 96ms
Transfer 2 KB
Monthly Cost €2/mo

These scripts may cost more than they're worth

  • opensource.google adds 832ms and costs ~€13/month
  • Unattributable adds 523ms and costs ~€8/month
  • www.gstatic.com adds 262ms and costs ~€4/month
  • Google Tag Manager adds 260ms and costs ~€4/month
  • www.gstatic.com adds 236ms 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

opensource.google takes 832ms 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 523ms 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.gstatic.com takes 262ms 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 260ms 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.gstatic.com takes 236ms 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 www.gstatic.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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