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https://web.whatsapp.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
5
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
50
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.
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.

1.00 s

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

6.60 s

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

505 ms

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.

1.70 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.

6.61 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 2 REVIEW 5 FIX
F
Page Weight Budget
Action
7.1 MB transferred, 47 requests
FIX
7.1 MB transferred, 47 requests
Critical::
Page weighs 29.2 MB (7.1 MB transferred)
Warning::
JavaScript is 6.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 6.3 MB
Info::
CSS is 252 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 252 KB
Info::
Fonts are 205 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 205 KB
Info::
47 HTTP requests
Info::
Estimated 1.5 g CO2 per page load
7.1 MB / 2.4 MB budget
7.1 MB transferred
47 requests
1.5 g CO2 per page load
JavaScript 6.3 MiB 88%
CSS 251.6 KiB 3%
Other 220.6 KiB 3%
Fonts 204.7 KiB 3%
Other 106.2 KiB 1%
HTML 87.3 KiB 1%
Other 3.7 KiB 0%
Images 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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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
99% third-party, 0 ms blocking
FIX
99% third-party, 0 ms blocking
Warning::
Third-party code accounts for 99% of page weight (7.1 MiB of 7.1 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
F
JS Bundles
Action
30 scripts, 5.2 MB unused
FIX
30 scripts, 5.2 MB unused
Warning::
https://static.whatsapp.net/rsrc.php/v4inNY4/yS/l/...: 1.1 MB unused (92%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.whatsapp.net/rsrc.php/v4iA_N4/yY/l/...: 1.0 MB unused (90%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.whatsapp.net/rsrc.php/v4iVjI4/yf/l/...: 562 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.whatsapp.net/rsrc.php/v4iwHo4/y7/l/...: 372 KB unused (89%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.whatsapp.net/rsrc.php/v4i6JB4/y6/l/...: 367 KB unused (89%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 5.2 MB
5326 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.whatsapp.net/rsrc.php/v4inNY4/yS/l/en_GB-j/SKMCDsKh4wK.js1201 KB1101 KB (92%)✓3rd
https://static.whatsapp.net/rsrc.php/v4iA_N4/yY/l/en_GB-j/ZoFABUea9vQUUfUKRQOFrFoJhCPFy-4-s1YNmnQSA7gyozCaQzwwH_hA3nHuO1--C5_ij85cg7Hin5tURb0HaVnE26Q7Kg4KLH8dDC9U6XUoTIk6Jb4e5C5Cidl1FlK37LMLiPBkLiaCb2g.js1189 KB1068 KB (90%)✓3rd
https://static.whatsapp.net/rsrc.php/v4iVjI4/yf/l/en_GB-j/DXGWA68xwJZlP8xQnTbvezOn3r5iJxtOBWl_HC4ZDPfubd42zZbhHOTCC44i2tgXly.js884 KB562 KB (64%)✓3rd
https://static.whatsapp.net/rsrc.php/v4iwHo4/y7/l/en_GB-j/nIJU843d-6H.js418 KB372 KB (89%)✓3rd
https://static.whatsapp.net/rsrc.php/v4i6JB4/y6/l/en_GB-j/K8L_FORkCMP.js410 KB367 KB (89%)✓3rd
https://static.whatsapp.net/rsrc.php/v4irK74/y2/l/en_GB-j/anAZ4Od6_T9.js370 KB335 KB (91%)✓3rd
https://static.whatsapp.net/rsrc.php/v4/yL/r/2LrPUBkpsrv.js375 KB313 KB (84%)✓3rd
https://static.whatsapp.net/rsrc.php/v4/y3/r/dX7s2n1TbOu.js283 KB245 KB (87%)✓3rd
https://static.whatsapp.net/rsrc.php/v4iTsc4/yS/l/en_GB-j/SS3GL4QArjf.js267 KB242 KB (91%)✓3rd
https://static.whatsapp.net/rsrc.php/v4iLyH4/yp/l/en_GB-j/93_OeHDxsPOrtrVL-IFFwfRVuFJinK35RAESi2a5Ii7jkTZo7z3n_COB6_RGmNNdzSC74bXkIUSnuTvN6XGOk6p0PN4QJHDrsP6B2OMWkdLYkFG35Lq6k2Ttjo3clesDNwNI3-f-feES58Q-g42oTNVGIMoVe79qj9XRP7kLyH59tIl_E50-minmRhgLarAGRP4pPybMFjBS_ybbxJcW8hY3zHIld2PSZ5HKRSguIQyB6E1_DnMswiMDX4K2Z-wbMQmJX-hB7RSQBuar5sU5zQWdfxXsgG4-5xXGOWondP9D1-DGQaconLCtDHifscxoIUpY77KLfj.js293 KB240 KB (82%)✓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
47 resources · 7.1 MB · 5.2 MB savings available
FIX
47 resources · 7.1 MB · 5.2 MB savings available
Warning::
Page weight 6.1 MB over 1MB target
Got: 7.1 MB Expected: ≤ 1 MB
Info::
~5.2 MB of savings available
Warning::
38 third-party resources (99% of weight)
Info::
14 resources over 200KB
47 resources · 7.1 MiB · 38 third-party 6.1 MiB over 1MB target
JavaScript 91% · 6.5 MiB
CSS 3% · 251.6 KiB
Font 3% · 204.7 KiB
Other 1% · 108.6 KiB
Document 1% · 87.3 KiB
Image 0% · 6.4 KiB

~5.2 MiB of savings available

Remove unused JavaScript: 5.2 MiB
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, no-cache, no-store, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, no-cache, no-store, must-revalidate

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
no-cache—Cache but always revalidate first
no-store—Never cache this response
must-revalidate—Must recheck with server after expiry
C
JS Execution Cost
Action
1990ms total JS execution
REVIEW
1990ms total JS execution
Warning::
https://static.whatsapp.net/rsrc.php/v4/yV/r/ce-O1...: 688ms CPU time
Warning::
https://static.whatsapp.net/rsrc.php/v4iVjI4/yf/l/...: 356ms CPU time
Info::
https://static.whatsapp.net/rsrc.php/v4/y3/r/dX7s2...: 193ms CPU time
Info::
https://web.whatsapp.com/: 191ms CPU time
Info::
https://static.whatsapp.net/rsrc.php/v4inNY4/yS/l/...: 172ms CPU time
Warning::
Third-party scripts: 1799ms (90% of total)

Main Thread Breakdown

Script Evaluation 55% Script Parsing & Compilation 28% Other 10%
ScriptTotalScriptingParse/CompileParty
https://static.whatsapp.net/rsrc.php/v4/yV/r/ce-O1eEeZ9o.js688ms638ms7ms3rd
https://static.whatsapp.net/rsrc.php/v4iVjI4/yf/l/en_GB-j/DXGWA68xwJZlP8xQnTbvezOn3r5iJxtOBWl_HC4ZDPfubd42zZbhHOTCC44i2tgXly.js356ms256ms73ms3rd
https://static.whatsapp.net/rsrc.php/v4/y3/r/dX7s2n1TbOu.js193ms162ms29ms3rd
https://web.whatsapp.com/191ms13ms0ms1st
https://static.whatsapp.net/rsrc.php/v4inNY4/yS/l/en_GB-j/SKMCDsKh4wK.js172ms38ms134ms3rd
Unattributable147ms47ms0ms3rd
https://static.whatsapp.net/rsrc.php/v4iA_N4/yY/l/en_GB-j/ZoFABUea9vQUUfUKRQOFrFoJhCPFy-4-s1YNmnQSA7gyozCaQzwwH_hA3nHuO1--C5_ij85cg7Hin5tURb0HaVnE26Q7Kg4KLH8dDC9U6XUoTIk6Jb4e5C5Cidl1FlK37LMLiPBkLiaCb2g.js118ms8ms105ms3rd
https://static.whatsapp.net/rsrc.php/v4iwHo4/y7/l/en_GB-j/nIJU843d-6H.js64ms4ms57ms3rd
data:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCl9fZCgiSW50bENMRFJOdW1iZXJUeXBlMDUiLFsiSW50bFZhcmlhdGlvbnMiXSwoZnVuY3Rpb24odCxuLHIsbyxhLGksbCl7InVzZSBzdHJpY3QiO3ZhciBlPXtnZXRWYXJpYXRpb246ZnVuY3Rpb24odCl7cmV0dXJuIHQ9PT0xP3IoIkludGxWYXJpYXRpb25zIikuTlVNQkVSX09ORTpyKCJJbnRsVmFyaWF0aW9ucyIpLk5VTUJFUl9PVEhFUn19LHM9ZTtsLmRlZmF1bHQ9c30pLDk4KTsKLy8jIHNvdXJjZVVSTD1odHRwczovL3N0YXRpYy53aGF0c2FwcC5uZXQvcnNyYy5waHAvdjQveTMvci9tLTVJUS04QmsyUy5qcwo=61ms56ms0ms3rd
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
6 images, 0 KB saveable
PASS
6 images, 0 KB saveable
Info::
All images are well-optimized
6 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
1 fonts (205 KB)
PASS
1 fonts (205 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

205 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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 1.0 s LCP 6.6 shttps://static.whatsapp.net/rsrc.php/yy/r/s3KknyKHL5v.woff2s3KknyKHL5v.woff2 https://static.whatsapp.net/rsrc.php/yy/r/s3KknyKHL5v.woff2 — 204.7 KiB — 62 ms — font-display: swap
s3KknyKHL5v.woff2 woff2 swap
Size 205 KB
Load time 62 ms
Start 848 ms
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
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 ~102 KB and ~204 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
47 requests over 2787ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 1.0 s LCP 6.6 shttps://web.whatsapp.com// https://web.whatsapp.com/ — 200 — 87.3 KiB — 264 ms — h2https://static.whatsapp.net/rsrc.php/v5/yo/l/0,cross/b8XlL3jdSUdA7PQro9bG3RE6KiCft4N4IcXbrB65bEEDlwij8nbyzl0.cssstatic.whatsapp.net/rsrc.php/v5/yo/... https://static.whatsapp.net/rsrc.php/v5/yo/l/0,cross/b8XlL3jdSUdA7PQro9bG3RE6KiCft4N4IcXbrB65bEEDlwij8nbyzl0.css — 200 — 240.4 KiB — 187 ms — h2https://static.whatsapp.net/rsrc.php/v4/yV/r/ce-O1eEeZ9o.jsstatic.whatsapp.net/rsrc.php/v4/yV/... https://static.whatsapp.net/rsrc.php/v4/yV/r/ce-O1eEeZ9o.js — 200 — 77.9 KiB — 159 ms — h2https://static.whatsapp.net/rsrc.php/v4/y6/r/uz2LWZJJ4N_.jsstatic.whatsapp.net/rsrc.php/v4/y6/... https://static.whatsapp.net/rsrc.php/v4/y6/r/uz2LWZJJ4N_.js — 200 — 33.2 KiB — 91 ms — h2https://static.whatsapp.net/rsrc.php/v4/yT/r/F3Bh_vg1Dvi_mrt6svGwY_JzPWV5AJSc10NhRPqTEjk4PbjCpseDapUrBGl1VNl-DEa_zHNlDMhh_CeeUTDH2pdaN2BaG9ISuhoe0qnL2dG90HwJ34wthXfB3u63lw_MkRQA.jsstatic.whatsapp.net/rsrc.php/v4/yT/... https://static.whatsapp.net/rsrc.php/v4/yT/r/F3Bh_vg1Dvi_mrt6svGwY_JzPWV5AJSc10NhRPqTEjk4PbjCpseDapUrBGl1VNl-DEa_zHNlDMhh_CeeUTDH2pdaN2BaG9ISuhoe0qnL2dG90HwJ34wthXfB3u63lw_MkRQA.js — 200 — 113.3 KiB — 170 ms — h2https://static.whatsapp.net/rsrc.php/v4/yP/r/TmE3jnttQmq.jsstatic.whatsapp.net/rsrc.php/v4/yP/... https://static.whatsapp.net/rsrc.php/v4/yP/r/TmE3jnttQmq.js — 200 — 83.3 KiB — 159 ms — h2https://static.whatsapp.net/rsrc.php/v4iqod4/yP/l/en_GB-j/KghIy0gcizKOwo1GF5ZPg00W3EJTXsHxUUuKeuprO5OH4FGnHcyLx2KsNIG0OVeIuSXhot8uhwfQV4nX3d9ojsCFYUnBJDvIpeskKglZLm8LYQANYbQi0UDlcOmHs77wjK-NIAigV-5idW9GSdHeMgZ91IoURUr9K2ba4L55PcDWCT_WBxtQCRYCzZs000JuVS5FHh2Hp5uzXNYP2qLHCXmPk0ZWe5VsiJZ0h1pCsviLnUnBmUH3fsmO0wHThdf-K6dZS2nKL1vZ3VY3Y_6uEo5q-4X5wzwCd1xqrhA4lXwHN4rOuWGxlWiQ4E6-9AlTcPy6iGfEHQ.jsstatic.whatsapp.net/rsrc.php/v4iqod... https://static.whatsapp.net/rsrc.php/v4iqod4/yP/l/en_GB-j/KghIy0gcizKOwo1GF5ZPg00W3EJTXsHxUUuKeuprO5OH4FGnHcyLx2KsNIG0OVeIuSXhot8uhwfQV4nX3d9ojsCFYUnBJDvIpeskKglZLm8LYQANYbQi0UDlcOmHs77wjK-NIAigV-5idW9GSdHeMgZ91IoURUr9K2ba4L55PcDWCT_WBxtQCRYCzZs000JuVS5FHh2Hp5uzXNYP2qLHCXmPk0ZWe5VsiJZ0h1pCsviLnUnBmUH3fsmO0wHThdf-K6dZS2nKL1vZ3VY3Y_6uEo5q-4X5wzwCd1xqrhA4lXwHN4rOuWGxlWiQ4E6-9AlTcPy6iGfEHQ.js — 200 — 226.3 KiB — 192 ms — h2https://static.whatsapp.net/rsrc.php/v4/y3/r/dX7s2n1TbOu.jsstatic.whatsapp.net/rsrc.php/v4/y3/... https://static.whatsapp.net/rsrc.php/v4/y3/r/dX7s2n1TbOu.js — 200 — 282.6 KiB — 200 ms — h2https://static.whatsapp.net/rsrc.php/v4iVjI4/yf/l/en_GB-j/DXGWA68xwJZlP8xQnTbvezOn3r5iJxtOBWl_HC4ZDPfubd42zZbhHOTCC44i2tgXly.jsstatic.whatsapp.net/rsrc.php/v4iVjI... https://static.whatsapp.net/rsrc.php/v4iVjI4/yf/l/en_GB-j/DXGWA68xwJZlP8xQnTbvezOn3r5iJxtOBWl_HC4ZDPfubd42zZbhHOTCC44i2tgXly.js — 200 — 884.0 KiB — 229 ms — h2https://static.whatsapp.net/rsrc.php/v4/yL/r/2LrPUBkpsrv.jsstatic.whatsapp.net/rsrc.php/v4/yL/... https://static.whatsapp.net/rsrc.php/v4/yL/r/2LrPUBkpsrv.js — 200 — 374.8 KiB — 202 ms — h2https://static.whatsapp.net/rsrc.php/v4inNY4/yS/l/en_GB-j/SKMCDsKh4wK.jsstatic.whatsapp.net/rsrc.php/v4inNY... https://static.whatsapp.net/rsrc.php/v4inNY4/yS/l/en_GB-j/SKMCDsKh4wK.js — 200 — 1.2 MiB — 263 ms — h2data:application/x-javascript; 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datadata:image/webp;base64,UklGRlIAAABXRUJQVlA4WAoAAAASAAAAAAAAAAAAQU5JTQYAAAD/////AABBTk1GJgAAAAAAAAAA…data:image/webp;base64,UklGRlIAAABX... data:image/webp;base64,UklGRlIAAABXRUJQVlA4WAoAAAASAAAAAAAAAAAAQU5JTQYAAAD/////AABBTk1GJgAAAAAAAAAA… — 200 — 0 B — 0 ms — datadata:image/webp;base64,UklGRh4AAABXRUJQVlA4TBEAAAAvAAAAAAfQ//73v/+BiOh/AAA=data:image/webp;base64,UklGRh4AAABX... data:image/webp;base64,UklGRh4AAABXRUJQVlA4TBEAAAAvAAAAAAfQ//73v/+BiOh/AAA= — 200 — 0 B — 0 ms — datahttps://static.whatsapp.net/btmanifest/1037799039/whatsapp/mainstatic.whatsapp.net/btmanifest/1037... https://static.whatsapp.net/btmanifest/1037799039/whatsapp/main — 200 — 104.9 KiB — 26 ms — h3https://static.whatsapp.net/rsrc.php/v4/yE/r/1pp3xbsWfjk.jsstatic.whatsapp.net/rsrc.php/v4/yE/... https://static.whatsapp.net/rsrc.php/v4/yE/r/1pp3xbsWfjk.js — 200 — 2.2 KiB — 22 ms — h3https://web.whatsapp.com/ajax/bootloader-endpoint/?nb_modules=WAWebToastManagerImpl&__user=0&__a=1&__req=1&__hs=20564.HYP%3Awhatsapp_comet_pkg.2.1...0&dpr=2&__ccg=UNKNOWN&__rev=1037799039&__s=ujss2k%3At383m1%3A9jgrav&__hsi=7631286648588938663&__dyn=7xeUjG1mxu1syUqxemm0NonwgU2owSAwHwNw9G2S0lW4o0B-q1ew6ywaq0yE462m0nS4oaEd814E9k2C0iK0D8vw8OfK0JUeo9U37wmE2exu16wa-0raazo11E2ZwrU6qE15E6Oq1ywlUO12wJwmEakUpwtU3Ywgo2qwae1Ywb6261NwNwp8&__csr=g9AQ6Ar96ijjPhcADk8q34OtMKwVklf5PmBf7aO4ROtSymBXZN4llV3LpkHsCAyVl-ZdQAye8ZYBFH_nmGXXF2qahF2n_HZGy6QRXyrlo8pkXxK0hi00m4O02AK3l1O01d52wKOw3yk08CaEK_gmOwsA1wCo2Cwrk&__hsdp=gcJ2W1csjs88mxb4q37Y4asngalp8ymnzqXJx6uil2byUkyFuK-A8igJ2Gxe2p1qm1hKmfyovy84mFbKWy8948zECiimcyUjAwxrlKeyUoG4Qeym4Ezxm2uF8owuU2ywuA8AyohoGay8qzryQdxG3TyEf888gw9S1AxG0OU6Cq5E5-fwXw8-5ogwopE6mEbodobE34wl-12w4ewoE2bwba2u2y12wiEb8&__hblp=0oC0wpEln12f82egy98DLWkREDYnsyZNQIin4s8h2b7RTd4Sjcda2hzyfLAwj4F6V4iuK74pFyS5okiFpb4e8wwtFF7LVXh4zASuC4BUinGozO8xfQ9rVaExdJ3eAJ-9kN9VIx5ADggzV4FaGuiS1Xwaa3-3F298C4mayEy6ESUJ3oqwZUG3O22482twp8qwcK1FCxq1vzUeU6yfG4Ulx21vVE6mEbodobE34Cwke12w92896a6Q7Ik6EgixJ1Uvo2bwba2uE9o4a1awIw&__sjsp=gcJ2W1csjslaxq4Ig16t2U&__comet_req=17&__spin_r=1037799039&__spin_b=trunk&__spin_t=1776797382/ajax/bootloader-endpoint/?nb_modul... https://web.whatsapp.com/ajax/bootloader-endpoint/?nb_modules=WAWebToastManagerImpl&__user=0&__a=1&__req=1&__hs=20564.HYP%3Awhatsapp_comet_pkg.2.1...0&dpr=2&__ccg=UNKNOWN&__rev=1037799039&__s=ujss2k%3At383m1%3A9jgrav&__hsi=7631286648588938663&__dyn=7xeUjG1mxu1syUqxemm0NonwgU2owSAwHwNw9G2S0lW4o0B-q1ew6ywaq0yE462m0nS4oaEd814E9k2C0iK0D8vw8OfK0JUeo9U37wmE2exu16wa-0raazo11E2ZwrU6qE15E6Oq1ywlUO12wJwmEakUpwtU3Ywgo2qwae1Ywb6261NwNwp8&__csr=g9AQ6Ar96ijjPhcADk8q34OtMKwVklf5PmBf7aO4ROtSymBXZN4llV3LpkHsCAyVl-ZdQAye8ZYBFH_nmGXXF2qahF2n_HZGy6QRXyrlo8pkXxK0hi00m4O02AK3l1O01d52wKOw3yk08CaEK_gmOwsA1wCo2Cwrk&__hsdp=gcJ2W1csjs88mxb4q37Y4asngalp8ymnzqXJx6uil2byUkyFuK-A8igJ2Gxe2p1qm1hKmfyovy84mFbKWy8948zECiimcyUjAwxrlKeyUoG4Qeym4Ezxm2uF8owuU2ywuA8AyohoGay8qzryQdxG3TyEf888gw9S1AxG0OU6Cq5E5-fwXw8-5ogwopE6mEbodobE34wl-12w4ewoE2bwba2u2y12wiEb8&__hblp=0oC0wpEln12f82egy98DLWkREDYnsyZNQIin4s8h2b7RTd4Sjcda2hzyfLAwj4F6V4iuK74pFyS5okiFpb4e8wwtFF7LVXh4zASuC4BUinGozO8xfQ9rVaExdJ3eAJ-9kN9VIx5ADggzV4FaGuiS1Xwaa3-3F298C4mayEy6ESUJ3oqwZUG3O22482twp8qwcK1FCxq1vzUeU6yfG4Ulx21vVE6mEbodobE34Cwke12w92896a6Q7Ik6EgixJ1Uvo2bwba2uE9o4a1awIw&__sjsp=gcJ2W1csjslaxq4Ig16t2U&__comet_req=17&__spin_r=1037799039&__spin_b=trunk&__spin_t=1776797382 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data:image/webp;base64,UklGRjoAAABXRUJQVlA4IC4AAACyAgCdASoCAAIALmk0mk0iIiIiIgBoSygABc6WWgAA/veff/0P… — 200 — 0 B — 0 ms — datahttps://web.whatsapp.com/favicon/1x/favicon/v4//favicon/1x/favicon/v4/ https://web.whatsapp.com/favicon/1x/favicon/v4/ — 200 — 388 B — 20 ms — h3https://static.whatsapp.net/rsrc.php/v4/y7/r/P9w6_WkvG4F.jsstatic.whatsapp.net/rsrc.php/v4/y7/... https://static.whatsapp.net/rsrc.php/v4/y7/r/P9w6_WkvG4F.js — 200 — 176.4 KiB — 34 ms — h3https://web.whatsapp.com/static_resources/webworker_v1/init_script/?__hs=20564.HYP%3Awhatsapp_comet_pkg.2.1...0&__spin_r=1037799039&__spin_b=trunk&__spin_t=1776797382/static_resources/webworker_v1/init... https://web.whatsapp.com/static_resources/webworker_v1/init_script/?__hs=20564.HYP%3Awhatsapp_comet_pkg.2.1...0&__spin_r=1037799039&__spin_b=trunk&__spin_t=1776797382 — 200 — 0 B — 30 ms — h3https://web.whatsapp.com/favicon/1x/favicon/v4//favicon/1x/favicon/v4/ https://web.whatsapp.com/favicon/1x/favicon/v4/ — 200 — 0 B — 4 ms — h3https://web.whatsapp.com/favicon/1x/favicon/v4//favicon/1x/favicon/v4/ https://web.whatsapp.com/favicon/1x/favicon/v4/ — 200 — 0 B — 3 ms — h3https://static.whatsapp.net/rsrc.php/v4/y0/r/_GIzs2CaVaj.jsstatic.whatsapp.net/rsrc.php/v4/y0/... https://static.whatsapp.net/rsrc.php/v4/y0/r/_GIzs2CaVaj.js — 200 — 38.2 KiB — 25 ms — h3https://web.whatsapp.com/ajax/bz?__a=1&__ccg=UNKNOWN&__comet_req=17&__hs=20564.HYP%3Awhatsapp_comet_pkg.2.1...0&__hsi=7631286648588938663&__req=2&__rev=1037799039&__s=ujss2k%3At383m1%3A9jgrav&__spin_b=trunk&__spin_r=1037799039&__spin_t=1776797382&__user=0&dpr=2&jazoest=22101&lsd=O0DvzRzhvYjkziIZsH8rVi&ph=C3/ajax/bz?__a=1&__ccg=UNKNOWN&__come... https://web.whatsapp.com/ajax/bz?__a=1&__ccg=UNKNOWN&__comet_req=17&__hs=20564.HYP%3Awhatsapp_comet_pkg.2.1...0&__hsi=7631286648588938663&__req=2&__rev=1037799039&__s=ujss2k%3At383m1%3A9jgrav&__spin_b=trunk&__spin_r=1037799039&__spin_t=1776797382&__user=0&dpr=2&jazoest=22101&lsd=O0DvzRzhvYjkziIZsH8rVi&ph=C3 — 200 — 226 B — 114 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
90% of JavaScript execution is third-party
First-party Third-party 1799ms · 4052KB · $24/mo
static.whatsapp.net
Other
Costly
Execution 688ms
Transfer 78 KB
Unused 44%
Monthly Cost $9/mo
static.whatsapp.net
Other
Costly
Execution 356ms
Transfer 884 KB
Unused 64%
Monthly Cost $5/mo
static.whatsapp.net
Other
Optional
Execution 193ms
Transfer 283 KB
Unused 87%
Monthly Cost $3/mo
static.whatsapp.net
Other
Optional
Execution 172ms
Transfer 1201 KB
Unused 92%
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 147ms
Transfer 0 KB
Monthly Cost $2/mo
static.whatsapp.net
Other
Optional
Execution 118ms
Transfer 1189 KB
Unused 90%
Monthly Cost $2/mo
static.whatsapp.net
Other
Optional
Execution 64ms
Transfer 418 KB
Unused 89%
Monthly Cost $1/mo
data:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCl9fZCgiSW50bENMRFJOdW1iZXJUeXBlMDUiLFsiSW50bFZhcmlhdGlvbnMiXSwoZnVuY3Rpb24odCxuLHIsbyxhLGksbCl7InVzZSBzdHJpY3QiO3ZhciBlPXtnZXRWYXJpYXRpb246ZnVuY3Rpb24odCl7cmV0dXJuIHQ9PT0xP3IoIkludGxWYXJpYXRpb25zIikuTlVNQkVSX09ORTpyKCJJbnRsVmFyaWF0aW9ucyIpLk5VTUJFUl9PVEhFUn19LHM9ZTtsLmRlZmF1bHQ9c30pLDk4KTsKLy8jIHNvdXJjZVVSTD1odHRwczovL3N0YXRpYy53aGF0c2FwcC5uZXQvcnNyYy5waHAvdjQveTMvci9tLTVJUS04QmsyUy5qcwo=
Other
Optional
Execution 61ms
Transfer 0 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • static.whatsapp.net adds 688ms and costs ~$9/month
  • static.whatsapp.net adds 356ms and costs ~$5/month

90% 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

static.whatsapp.net takes 688ms 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

static.whatsapp.net takes 356ms 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

64% of static.whatsapp.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

87% of static.whatsapp.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

92% of static.whatsapp.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

90% of static.whatsapp.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

89% of static.whatsapp.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

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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