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https://web.whatsapp.com

Performance

· 24 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
85
GRADE
B
FIX
6
REVIEW
2
PASS
12
INFO
4

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

Mobile Desktop
51
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.

1.30 s

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

3.32 s

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

658 ms

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

0.004

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

1.73 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.

4.87 s

Page Load Progression

397 ms
794 ms
1.2 s
1.6 s
2.0 s
2.4 s
2.8 s
3.2 s
Checks
24
12 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
6.1 MB transferred, 43 requests
FIX
6.1 MB transferred, 43 requests
Critical::
Page weighs 29.5 MB (6.1 MB transferred)
Warning::
JavaScript is 5.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 5.2 MB
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::
43 HTTP requests
Info::
Estimated 1.3 g CO2 per page load
6.1 MB / 2.4 MB budget
6.1 MB transferred
43 requests
1.3 g CO2 per page load
JavaScript 5.2 MiB 86%
Fonts 205.0 KiB 3%
Other 194.1 KiB 3%
CSS 189.2 KiB 3%
Other 170.1 KiB 3%
HTML 95.3 KiB 2%
Other 3.8 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

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
98% third-party, 0 ms blocking
FIX
98% third-party, 0 ms blocking
Warning::
Third-party code accounts for 98% of page weight (6.0 MiB of 6.1 MiB)
Info::
Third-party blocking time is low (0 ms)
98%
First-party Third-party
D
JS Execution Cost
Action
2188ms total JS execution
FIX
2188ms total JS execution
Warning::
https://static.whatsapp.net/rsrc.php/v4/yA/r/yNZV7...: 799ms CPU time
Warning::
https://static.whatsapp.net/rsrc.php/v4iz7c4/yQ/l/...: 546ms CPU time
Warning::
https://web.whatsapp.com/: 276ms CPU time
Info::
Unattributable: 168ms CPU time
Info::
https://static.whatsapp.net/rsrc.php/v4iwfC4/yj/l/...: 155ms CPU time
Warning::
Third-party scripts: 1744ms (80% of total)

Main Thread Breakdown

Script Evaluation 55% Script Parsing & Compilation 24% Other 10% Style & Layout 5%
ScriptTotalScriptingParse/CompileParty
https://static.whatsapp.net/rsrc.php/v4/yA/r/yNZV7jdVFoC.js799ms765ms5ms3rd
https://static.whatsapp.net/rsrc.php/v4iz7c4/yQ/l/en_US-j/1WF84XxOFCz1sKbrXy2BHR5S6jq-b22GM-nrxc5Jb9ZPs2dBR77VU0LtKYmjJ9T4HcEH-PqCGmG2M.js546ms428ms76ms3rd
https://web.whatsapp.com/276ms12ms0ms1st
Unattributable168ms46ms0ms1st
https://static.whatsapp.net/rsrc.php/v4iwfC4/yj/l/en_US-j/kUWGbmOEOU5EgxASlXkeSEWoIAPHpMb7u_6IZt-JEyqrgfFibOBrqGt0suPxz5PkLJItq1VwrLyVwaWEzBBDpUYvvqcGh3rA-9eg_rXykynwipyE_RKvmw-D23nM9wJKQgtNow3fQjM-3-1rWAyQxSeoSff-1Koj5jYIxtwzqBb7l9PncDqc5jqq17F-RjreKhhBH33KcFhCVlRPPwEJ-ROiKDdMjVpxAqytidtkROVcPjYtNpwquzGkVT0XPWta0XanDJjdISzUQlWDw6gCtk84-QsTta0ONgusvu8w53VceTQj554iB2OMWkdLYkFsJhjQwA1EYU.js155ms14ms141ms3rd
https://static.whatsapp.net/rsrc.php/v4i8re4/yt/l/en_US-j/xQeBZDC4Fg1.js131ms42ms85ms3rd
https://static.whatsapp.net/rsrc.php/v4iiwh4/yN/l/en_US-j/BSsE-fUD1tJ.js59ms3ms56ms3rd
https://static.whatsapp.net/rsrc.php/v4iMfe4/yU/l/en_US-j/U5KosiEwdJz21XH6px9ckP0Dr5E4kn-fZSdUoth8Y_Uzc0_4NC9t6JTIXyEVzp5ecnhKFyYHJMOrqGkYs71Nq93UdOsFSNgg4oYimXTyCTiBBu1yoaH6_recKGUgBJSaveS-OZTK9GpWCalWLDy2CGC31WG5I_wPWS5CbTfbLCHDWbK74NvqMyGa9mHhRgxME01XdEwOwYeYbBY18gfoEq8k-bSDuGP9Ec6EO2iyN_hOuj0Vv_nRGUWhxOjPuHg4lKqGFi3_TiM6yHgk3Wj7zgD1wrYAm-mV-g4s2XLtQiXl7v_kCWOuuYDUTLqI22Q8bTc_1-Otys.js54ms8ms44ms3rd
F
JS Bundles
Action
31 scripts, 4.3 MB unused
FIX
31 scripts, 4.3 MB unused
Warning::
https://static.whatsapp.net/rsrc.php/v4iwfC4/yj/l/...: 1.2 MB unused (90%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.whatsapp.net/rsrc.php/v4i8re4/yt/l/...: 650 KB unused (89%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.whatsapp.net/rsrc.php/v4iz7c4/yQ/l/...: 587 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.whatsapp.net/rsrc.php/v4iMfe4/yU/l/...: 389 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.whatsapp.net/rsrc.php/v4iiwh4/yN/l/...: 360 KB unused (89%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 4.3 MB
4373 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.whatsapp.net/rsrc.php/v4iwfC4/yj/l/en_US-j/kUWGbmOEOU5EgxASlXkeSEWoIAPHpMb7u_6IZt-JEyqrgfFibOBrqGt0suPxz5PkLJItq1VwrLyVwaWEzBBDpUYvvqcGh3rA-9eg_rXykynwipyE_RKvmw-D23nM9wJKQgtNow3fQjM-3-1rWAyQxSeoSff-1Koj5jYIxtwzqBb7l9PncDqc5jqq17F-RjreKhhBH33KcFhCVlRPPwEJ-ROiKDdMjVpxAqytidtkROVcPjYtNpwquzGkVT0XPWta0XanDJjdISzUQlWDw6gCtk84-QsTta0ONgusvu8w53VceTQj554iB2OMWkdLYkFsJhjQwA1EYU.js1362 KB1219 KB (90%)✓3rd
https://static.whatsapp.net/rsrc.php/v4i8re4/yt/l/en_US-j/xQeBZDC4Fg1.js731 KB650 KB (89%)✓3rd
https://static.whatsapp.net/rsrc.php/v4iz7c4/yQ/l/en_US-j/1WF84XxOFCz1sKbrXy2BHR5S6jq-b22GM-nrxc5Jb9ZPs2dBR77VU0LtKYmjJ9T4HcEH-PqCGmG2M.js835 KB587 KB (70%)✓3rd
https://static.whatsapp.net/rsrc.php/v4iMfe4/yU/l/en_US-j/U5KosiEwdJz21XH6px9ckP0Dr5E4kn-fZSdUoth8Y_Uzc0_4NC9t6JTIXyEVzp5ecnhKFyYHJMOrqGkYs71Nq93UdOsFSNgg4oYimXTyCTiBBu1yoaH6_recKGUgBJSaveS-OZTK9GpWCalWLDy2CGC31WG5I_wPWS5CbTfbLCHDWbK74NvqMyGa9mHhRgxME01XdEwOwYeYbBY18gfoEq8k-bSDuGP9Ec6EO2iyN_hOuj0Vv_nRGUWhxOjPuHg4lKqGFi3_TiM6yHgk3Wj7zgD1wrYAm-mV-g4s2XLtQiXl7v_kCWOuuYDUTLqI22Q8bTc_1-Otys.js510 KB389 KB (76%)✓3rd
https://static.whatsapp.net/rsrc.php/v4iiwh4/yN/l/en_US-j/BSsE-fUD1tJ.js405 KB360 KB (89%)✓3rd
https://static.whatsapp.net/rsrc.php/v4/yx/r/mm9GGRMf3SB.js225 KB202 KB (90%)✓3rd
https://static.whatsapp.net/rsrc.php/v4iGGx4/yn/l/en_US-j/DUhYsAsD5JY.js209 KB190 KB (91%)✓3rd
https://static.whatsapp.net/rsrc.php/v4iM2P4/yU/l/en_US-j/Yh7oVDmXa5f.js187 KB164 KB (88%)✓3rd
https://static.whatsapp.net/rsrc.php/v4isWu4/y0/l/en_US-j/0nxw9UfdA7x.js166 KB152 KB (92%)✓3rd
https://static.whatsapp.net/rsrc.php/v4ipy44/yy/l/en_US-j/6AGj8JMNZdZ.js135 KB123 KB (91%)✓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
43 resources · 6.1 MB · 4.3 MB savings available
FIX
43 resources · 6.1 MB · 4.3 MB savings available
Warning::
Page weight 6.1 MB exceeds 1 MB target by 5.1 MB
Got: 6.1 MB Expected: ≤ 1 MB
Info::
~4.3 MB of savings available
Warning::
33 third-party resources (98% of weight)
Info::
8 resources over 200KB
43 resources · 6.1 MiB · 33 third-party 5.1 MiB over 1MB target
JavaScript 89% · 5.4 MiB
Font 3% · 205.0 KiB
CSS 3% · 189.2 KiB
Other 3% · 172.6 KiB
Document 2% · 95.3 KiB
Image 0% · 6.4 KiB

~4.3 MiB of savings available

Remove unused JavaScript: 4.3 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
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
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
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Info::
All images are well-optimized
1 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 FCP 1.3 s LCP 3.3 shttps://static.whatsapp.net/rsrc.php/yy/r/s3KknyKHL5v.woff2s3KknyKHL5v.woff2 https://static.whatsapp.net/rsrc.php/yy/r/s3KknyKHL5v.woff2 — 205.0 KiB — 23 ms — font-display: swap
s3KknyKHL5v.woff2 woff2 swap
Size 205 KB
Load time 23 ms
Start 631 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
A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
Document Compression
Document response uses brotli
PASS
Document response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+
Asset Compression
All 1 asset host use brotli
PASS
All 1 asset host use brotli
Info::
static.whatsapp.net serves assets with brotli (assets: 13)
Got: static.whatsapp.net (text/css)
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: private, no-cache, no-store, must-revalidate
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding, User-Agent, Accept-Language
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
Network Waterfall
43 requests over 2280ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.3 s LCP 3.3 shttps://web.whatsapp.com// https://web.whatsapp.com/ — 200 — 95.3 KiB — 495 ms — h2https://static.whatsapp.net/rsrc.php/v5/yd/l/0,cross/I3Bnu8ALToVKkmsA6qiUsNOB_OY8k1KqH.cssstatic.whatsapp.net/rsrc.php/v5/yd/... https://static.whatsapp.net/rsrc.php/v5/yd/l/0,cross/I3Bnu8ALToVKkmsA6qiUsNOB_OY8k1KqH.css — 200 — 189.2 KiB — 141 ms — h2https://static.whatsapp.net/rsrc.php/v4/yA/r/yNZV7jdVFoC.jsstatic.whatsapp.net/rsrc.php/v4/yA/... https://static.whatsapp.net/rsrc.php/v4/yA/r/yNZV7jdVFoC.js — 200 — 76.9 KiB — 153 ms — h2https://static.whatsapp.net/rsrc.php/v4/yX/r/6XAglkoVXjF5SP815S78jCXCeRHSjJ3XszSzQ0VN_3NPOcvegDn2UeDg7zQlmispEi2DoNJSuXYKcibJkO_PKzLne0qnL2dG90HKa8aOC8-JP_rO1GHH6N2XQfibXh0vdaWGso6pjbbzH2b.jsstatic.whatsapp.net/rsrc.php/v4/yX/... https://static.whatsapp.net/rsrc.php/v4/yX/r/6XAglkoVXjF5SP815S78jCXCeRHSjJ3XszSzQ0VN_3NPOcvegDn2UeDg7zQlmispEi2DoNJSuXYKcibJkO_PKzLne0qnL2dG90HKa8aOC8-JP_rO1GHH6N2XQfibXh0vdaWGso6pjbbzH2b.js — 200 — 119.1 KiB — 155 ms — h2https://static.whatsapp.net/rsrc.php/v4/y0/r/eDg9cFyXmNS.jsstatic.whatsapp.net/rsrc.php/v4/y0/... https://static.whatsapp.net/rsrc.php/v4/y0/r/eDg9cFyXmNS.js — 200 — 46.9 KiB — 135 ms — h2https://static.whatsapp.net/rsrc.php/v4/yF/r/ODeFkUjI7ok.jsstatic.whatsapp.net/rsrc.php/v4/yF/... https://static.whatsapp.net/rsrc.php/v4/yF/r/ODeFkUjI7ok.js — 200 — 80.0 KiB — 148 ms — h2https://static.whatsapp.net/rsrc.php/v4iMfe4/yU/l/en_US-j/U5KosiEwdJz21XH6px9ckP0Dr5E4kn-fZSdUoth8Y_Uzc0_4NC9t6JTIXyEVzp5ecnhKFyYHJMOrqGkYs71Nq93UdOsFSNgg4oYimXTyCTiBBu1yoaH6_recKGUgBJSaveS-OZTK9GpWCalWLDy2CGC31WG5I_wPWS5CbTfbLCHDWbK74NvqMyGa9mHhRgxME01XdEwOwYeYbBY18gfoEq8k-bSDuGP9Ec6EO2iyN_hOuj0Vv_nRGUWhxOjPuHg4lKqGFi3_TiM6yHgk3Wj7zgD1wrYAm-mV-g4s2XLtQiXl7v_kCWOuuYDUTLqI22Q8bTc_1-Otys.jsstatic.whatsapp.net/rsrc.php/v4iMfe... https://static.whatsapp.net/rsrc.php/v4iMfe4/yU/l/en_US-j/U5KosiEwdJz21XH6px9ckP0Dr5E4kn-fZSdUoth8Y_Uzc0_4NC9t6JTIXyEVzp5ecnhKFyYHJMOrqGkYs71Nq93UdOsFSNgg4oYimXTyCTiBBu1yoaH6_recKGUgBJSaveS-OZTK9GpWCalWLDy2CGC31WG5I_wPWS5CbTfbLCHDWbK74NvqMyGa9mHhRgxME01XdEwOwYeYbBY18gfoEq8k-bSDuGP9Ec6EO2iyN_hOuj0Vv_nRGUWhxOjPuHg4lKqGFi3_TiM6yHgk3Wj7zgD1wrYAm-mV-g4s2XLtQiXl7v_kCWOuuYDUTLqI22Q8bTc_1-Otys.js — 200 — 509.9 KiB — 200 ms — h2https://static.whatsapp.net/rsrc.php/v4iHys4/yu/l/en_US-j/3eAfZ4uZlGxRHMjINyTyLn86zb2ICvGdmJlVJ59IhS61-n6gPcr3XClnQADeJVahv_EbPG_2iHZIBIxApzT7tDl6qLHCXmPk0ZW15ZOIkAZcGomGGn_UjI1fqdSstWnRCBwVmhUXdHTpUbLypWGyW953KKsfzVFsEEHUzaRmEPMHPtin0tDk4jry01Vtr9x9pi_sGqsfOvzcMctbijFvS-hhjSk-Nk_XoHT_rgzJe7i8t5znGHO53jHr76J0VuWpdgoDRaeZjtco1gqMKWhNv46YQ2YP1PBWQH8TZPuhcLoER_Y_tZYmCwamb14RsoKZiCZp8pgh5q.jsstatic.whatsapp.net/rsrc.php/v4iHys... https://static.whatsapp.net/rsrc.php/v4iHys4/yu/l/en_US-j/3eAfZ4uZlGxRHMjINyTyLn86zb2ICvGdmJlVJ59IhS61-n6gPcr3XClnQADeJVahv_EbPG_2iHZIBIxApzT7tDl6qLHCXmPk0ZW15ZOIkAZcGomGGn_UjI1fqdSstWnRCBwVmhUXdHTpUbLypWGyW953KKsfzVFsEEHUzaRmEPMHPtin0tDk4jry01Vtr9x9pi_sGqsfOvzcMctbijFvS-hhjSk-Nk_XoHT_rgzJe7i8t5znGHO53jHr76J0VuWpdgoDRaeZjtco1gqMKWhNv46YQ2YP1PBWQH8TZPuhcLoER_Y_tZYmCwamb14RsoKZiCZp8pgh5q.js — 200 — 42.4 KiB — 130 ms — h2https://static.whatsapp.net/rsrc.php/v4iz7c4/yQ/l/en_US-j/1WF84XxOFCz1sKbrXy2BHR5S6jq-b22GM-nrxc5Jb9ZPs2dBR77VU0LtKYmjJ9T4HcEH-PqCGmG2M.jsstatic.whatsapp.net/rsrc.php/v4iz7c... https://static.whatsapp.net/rsrc.php/v4iz7c4/yQ/l/en_US-j/1WF84XxOFCz1sKbrXy2BHR5S6jq-b22GM-nrxc5Jb9ZPs2dBR77VU0LtKYmjJ9T4HcEH-PqCGmG2M.js — 200 — 835.1 KiB — 249 ms — h2https://static.whatsapp.net/rsrc.php/v4i8re4/yt/l/en_US-j/xQeBZDC4Fg1.jsstatic.whatsapp.net/rsrc.php/v4i8re... https://static.whatsapp.net/rsrc.php/v4i8re4/yt/l/en_US-j/xQeBZDC4Fg1.js — 200 — 731.1 KiB — 250 ms — h2https://static.whatsapp.net/rsrc.php/v4/yx/r/mm9GGRMf3SB.jsstatic.whatsapp.net/rsrc.php/v4/yx/... https://static.whatsapp.net/rsrc.php/v4/yx/r/mm9GGRMf3SB.js — 200 — 224.8 KiB — 173 ms — h2data:application/x-javascript; 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h2https://static.whatsapp.net/rsrc.php/v4/yx/r/mm9GGRMf3SB.jsstatic.whatsapp.net/rsrc.php/v4/yx/... https://static.whatsapp.net/rsrc.php/v4/yx/r/mm9GGRMf3SB.js — 200 — 224.8 KiB — 173 ms — h2data:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCnZhciBkYXRhRWxlbWVudD1…data:application/x-javascript; char... data:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCnZhciBkYXRhRWxlbWVudD1… — 200 — 0 B — 0 ms — datadata:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCl9fYW5ub3RhdG9yPWZ1bmN…data:application/x-javascript; char... data:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCl9fYW5ub3RhdG9yPWZ1bmN… — 200 — 0 B — 0 ms — datadata:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCl9idGxkcj17fSxfbm93SW5…data:application/x-javascript; char... data:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCl9idGxkcj17fSxfbm93SW5… — 200 — 0 B — 0 ms — datadata:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCihmdW5jdGlvbigpe2Z1bmN…data:application/x-javascript; char... data:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCihmdW5jdGlvbigpe2Z1bmN… — 200 — 0 B — 0 ms — datadata:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCiJ1c2Ugc3RyaWN0Ijt0cnl…data:application/x-javascript; char... data:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCiJ1c2Ugc3RyaWN0Ijt0cnl… — 200 — 0 B — 0 ms — datadata:text/javascript;base64,cmVxdWlyZUxhenkoWyJTZXJ2ZXJKU1BheWxvYWRMaXN0ZW5lciJdLGZ1bmN0aW9uKG0pe20…data:text/javascript;base64,cmVxdWl... data:text/javascript;base64,cmVxdWlyZUxhenkoWyJTZXJ2ZXJKU1BheWxvYWRMaXN0ZW5lciJdLGZ1bmN0aW9uKG0pe20… — 200 — 0 B — 0 ms — datahttps://web.whatsapp.com/data/manifest.json/data/manifest.json https://web.whatsapp.com/data/manifest.json — 200 — 3.8 KiB — 222 ms — h2https://static.whatsapp.net/rsrc.php/yy/r/s3KknyKHL5v.woff2static.whatsapp.net/rsrc.php/yy/r/s... https://static.whatsapp.net/rsrc.php/yy/r/s3KknyKHL5v.woff2 — 200 — 205.0 KiB — 23 ms — h2https://static.whatsapp.net/rsrc.php/yd/r/PfkSLByWV8O.webpstatic.whatsapp.net/rsrc.php/yd/r/P... https://static.whatsapp.net/rsrc.php/yd/r/PfkSLByWV8O.webp — 200 — 3.7 KiB — 23 ms — h3https://static.whatsapp.net/rsrc.php/yy/r/NHqvcz02g54.webpstatic.whatsapp.net/rsrc.php/yy/r/N... https://static.whatsapp.net/rsrc.php/yy/r/NHqvcz02g54.webp — 200 — 2.3 KiB — 22 ms — h3https://static.whatsapp.net/rsrc.php/v4iwfC4/yj/l/en_US-j/kUWGbmOEOU5EgxASlXkeSEWoIAPHpMb7u_6IZt-JEyqrgfFibOBrqGt0suPxz5PkLJItq1VwrLyVwaWEzBBDpUYvvqcGh3rA-9eg_rXykynwipyE_RKvmw-D23nM9wJKQgtNow3fQjM-3-1rWAyQxSeoSff-1Koj5jYIxtwzqBb7l9PncDqc5jqq17F-RjreKhhBH33KcFhCVlRPPwEJ-ROiKDdMjVpxAqytidtkROVcPjYtNpwquzGkVT0XPWta0XanDJjdISzUQlWDw6gCtk84-QsTta0ONgusvu8w53VceTQj554iB2OMWkdLYkFsJhjQwA1EYU.jsstatic.whatsapp.net/rsrc.php/v4iwfC... https://static.whatsapp.net/rsrc.php/v4iwfC4/yj/l/en_US-j/kUWGbmOEOU5EgxASlXkeSEWoIAPHpMb7u_6IZt-JEyqrgfFibOBrqGt0suPxz5PkLJItq1VwrLyVwaWEzBBDpUYvvqcGh3rA-9eg_rXykynwipyE_RKvmw-D23nM9wJKQgtNow3fQjM-3-1rWAyQxSeoSff-1Koj5jYIxtwzqBb7l9PncDqc5jqq17F-RjreKhhBH33KcFhCVlRPPwEJ-ROiKDdMjVpxAqytidtkROVcPjYtNpwquzGkVT0XPWta0XanDJjdISzUQlWDw6gCtk84-QsTta0ONgusvu8w53VceTQj554iB2OMWkdLYkFsJhjQwA1EYU.js — 200 — 1.3 MiB — 210 ms — h3https://static.whatsapp.net/rsrc.php/v4iiwh4/yN/l/en_US-j/BSsE-fUD1tJ.jsstatic.whatsapp.net/rsrc.php/v4iiwh... https://static.whatsapp.net/rsrc.php/v4iiwh4/yN/l/en_US-j/BSsE-fUD1tJ.js — 200 — 404.5 KiB — 177 ms — h3https://static.whatsapp.net/rsrc.php/v4im2R4/yy/l/en_US-j/wzFU6ZzSqKe66SHGxAeHL9lU04SMJd9Zm6wkGy8uGuI_3oUQwMqvw1gKsNAydBOz3smu_vA8FOoKT8kYn13wD1rQdmfiU5x6CLvsabKcRPSegqxsOzVRrXrg3d7loHY77ENiLK7wQd1f3TGGHJzfmxO95LSCGqm0_NB5eTKCGtLRc1or9FNDcdZc3Hu4sFW0PTgjcCOvSkMkjyxoqwdl7kYEODFmbg_h6dv3TcOhC4sM8pHXEUCf7zfN5YFoBI5Ks4nnxslLnLCtDHifscxoIUpY77KLfjaWSr6AcwcloIkB67_ZKw9jlPE_am7CZAG_cUVu92oDgl.jsstatic.whatsapp.net/rsrc.php/v4im2R... https://static.whatsapp.net/rsrc.php/v4im2R4/yy/l/en_US-j/wzFU6ZzSqKe66SHGxAeHL9lU04SMJd9Zm6wkGy8uGuI_3oUQwMqvw1gKsNAydBOz3smu_vA8FOoKT8kYn13wD1rQdmfiU5x6CLvsabKcRPSegqxsOzVRrXrg3d7loHY77ENiLK7wQd1f3TGGHJzfmxO95LSCGqm0_NB5eTKCGtLRc1or9FNDcdZc3Hu4sFW0PTgjcCOvSkMkjyxoqwdl7kYEODFmbg_h6dv3TcOhC4sM8pHXEUCf7zfN5YFoBI5Ks4nnxslLnLCtDHifscxoIUpY77KLfjaWSr6AcwcloIkB67_ZKw9jlPE_am7CZAG_cUVu92oDgl.js — 200 — 76.9 KiB — 155 ms — h3https://static.whatsapp.net/rsrc.php/v4ipy44/yy/l/en_US-j/6AGj8JMNZdZ.jsstatic.whatsapp.net/rsrc.php/v4ipy4... https://static.whatsapp.net/rsrc.php/v4ipy44/yy/l/en_US-j/6AGj8JMNZdZ.js — 200 — 135.2 KiB — 190 ms — h3https://static.whatsapp.net/rsrc.php/v4iTVp4/yw/l/en_US-j/FJ0UhBRYlON.jsstatic.whatsapp.net/rsrc.php/v4iTVp... https://static.whatsapp.net/rsrc.php/v4iTVp4/yw/l/en_US-j/FJ0UhBRYlON.js — 200 — 136.4 KiB — 196 ms — h3https://static.whatsapp.net/rsrc.php/v4iGGx4/yn/l/en_US-j/DUhYsAsD5JY.jsstatic.whatsapp.net/rsrc.php/v4iGGx... https://static.whatsapp.net/rsrc.php/v4iGGx4/yn/l/en_US-j/DUhYsAsD5JY.js — 200 — 209.2 KiB — 180 ms — h3https://static.whatsapp.net/rsrc.php/v4iM2P4/yU/l/en_US-j/Yh7oVDmXa5f.jsstatic.whatsapp.net/rsrc.php/v4iM2P... https://static.whatsapp.net/rsrc.php/v4iM2P4/yU/l/en_US-j/Yh7oVDmXa5f.js — 200 — 187.1 KiB — 184 ms — h3https://static.whatsapp.net/rsrc.php/v4isWu4/y0/l/en_US-j/0nxw9UfdA7x.jsstatic.whatsapp.net/rsrc.php/v4isWu... https://static.whatsapp.net/rsrc.php/v4isWu4/y0/l/en_US-j/0nxw9UfdA7x.js — 200 — 166.4 KiB — 193 ms — h3https://web.whatsapp.com/static_resources/webworker_v1/init_script/?__hs=20719.HYP%3Awhatsapp_comet_pkg.2.1...0&__spin_r=1048249751&__spin_b=trunk&__spin_t=1790179138/static_resources/webworker_v1/init... https://web.whatsapp.com/static_resources/webworker_v1/init_script/?__hs=20719.HYP%3Awhatsapp_comet_pkg.2.1...0&__spin_r=1048249751&__spin_b=trunk&__spin_t=1790179138 — 200 — 128 B — 93 ms — h3https://static.whatsapp.net/rsrc.php/v4ia544/yu/l/en_US-j/sbQzZpw3EfI.jsstatic.whatsapp.net/rsrc.php/v4ia54... https://static.whatsapp.net/rsrc.php/v4ia544/yu/l/en_US-j/sbQzZpw3EfI.js — 200 — 5.2 KiB — 69 ms — h3https://web.whatsapp.com/static_resources/webworker_v1/init_script/?__hs=20719.HYP%3Awhatsapp_comet_pkg.2.1...0&__spin_r=1048249751&__spin_b=trunk&__spin_t=1790179138/static_resources/webworker_v1/init... https://web.whatsapp.com/static_resources/webworker_v1/init_script/?__hs=20719.HYP%3Awhatsapp_comet_pkg.2.1...0&__spin_r=1048249751&__spin_b=trunk&__spin_t=1790179138 — 200 — 0 B — 300 ms — h3data:image/webp;base64,UklGRjoAAABXRUJQVlA4IC4AAACyAgCdASoCAAIALmk0mk0iIiIiIgBoSygABc6WWgAA/veff/0P…data:image/webp;base64,UklGRjoAAABX... data:image/webp;base64,UklGRjoAAABXRUJQVlA4IC4AAACyAgCdASoCAAIALmk0mk0iIiIiIgBoSygABc6WWgAA/veff/0P… — 200 — 0 B — 0 ms — datahttps://static.whatsapp.net/rsrc.php/v4/yO/r/op88iTvt1jI.jsstatic.whatsapp.net/rsrc.php/v4/yO/... https://static.whatsapp.net/rsrc.php/v4/yO/r/op88iTvt1jI.js — 200 — 228 B — 23 ms — h3https://web.whatsapp.com/ajax/bootloader-endpoint/?nb_modules=WAWebToastManagerImpl%2CWDSLoadRobotoVariableFont&__user=0&__a=1&__req=1&__hs=20719.HYP%3Awhatsapp_comet_pkg.2.1...0&dpr=2&__ccg=UNKNOWN&__rev=1048249751&__s=ez0nrv%3Alqcniw%3Akh9md7&__hsi=7688760851884650728&__dyn=7xeUjG1mxu1syUqxemm0NonwgU2owSAwHwNw9G2S0lW4o0B-q1ew6ywaq0yE462m0nS4oaEd814E9k2C0iK0D8vw8OfK0JUeo9U37wmE2exu16wa-0raazo11E2ZwrU6C0hq1ICwbGcwgEbo5G2Be6o7u0_8460CE2zwv82Nwxwso2mwRy8fi0&__csr=g4Pib111zOT5hAH9qaJFRisttH3s4kYYaYjkgyMFd9EJvrLlaR8iAGRn8BhKq8iaiRuRhqDBpqVcPKqLWr_tehAAKjWmAlq8AAZKtmlaQu-dxi3248aUc88E118Kla0zo01DXm0-Q015Ixy07FxNRB7w2prw8-U6Ex408yK0kd4xG3i58giwRAwDxqcwNw&__hsdp=gbY8gy8ApMm72A66GIVrQfpBasoe4PgiOaOa4WVkJavppd4odomy9QLCpC8AAQFBhWQmCy5TuLEypGBuF5zpGG9F1am3byXhAV4A58a9GnBSEigTykUoKq9Dxa4pEqUICXzESqiumGwnEOpxJ7xadybCx92p4eAwUwAyEiglway1dyrwDz-0ZoO10Ugy85-3C58K2eEtwjU4y684W1OwiJ4wjEoy8kwiU4S&__hblp=0tC0CGAgPxhBoO9x2eE4BkYgbqWZRbrdq9kMea-DAelMxR4YnsROhakgxandb4tH7lA8c95dFmAeFrBwCeheOljJF7i_G4GGutnlmJmGzO5BSnjyQt9XExFQicoZfgKd-CgZd5n8EGr8uSGg5ScCopQu4ES8Kq4A9AgWi3y2iax91aE2EwjoCU9UB4UmwdWcwge48y1vwVxibwzG7omjgoxC18xy262O1OwiJ4wip8oy8kxQ9y9Q9yhdwTw&__sjsp=gbY8gy8ApMm72Ah1eu4Z1-&__comet_req=17&__spin_r=1048249751&__spin_b=trunk&__spin_t=1790179138/ajax/bootloader-endpoint/?nb_modul... https://web.whatsapp.com/ajax/bootloader-endpoint/?nb_modules=WAWebToastManagerImpl%2CWDSLoadRobotoVariableFont&__user=0&__a=1&__req=1&__hs=20719.HYP%3Awhatsapp_comet_pkg.2.1...0&dpr=2&__ccg=UNKNOWN&__rev=1048249751&__s=ez0nrv%3Alqcniw%3Akh9md7&__hsi=7688760851884650728&__dyn=7xeUjG1mxu1syUqxemm0NonwgU2owSAwHwNw9G2S0lW4o0B-q1ew6ywaq0yE462m0nS4oaEd814E9k2C0iK0D8vw8OfK0JUeo9U37wmE2exu16wa-0raazo11E2ZwrU6C0hq1ICwbGcwgEbo5G2Be6o7u0_8460CE2zwv82Nwxwso2mwRy8fi0&__csr=g4Pib111zOT5hAH9qaJFRisttH3s4kYYaYjkgyMFd9EJvrLlaR8iAGRn8BhKq8iaiRuRhqDBpqVcPKqLWr_tehAAKjWmAlq8AAZKtmlaQu-dxi3248aUc88E118Kla0zo01DXm0-Q015Ixy07FxNRB7w2prw8-U6Ex408yK0kd4xG3i58giwRAwDxqcwNw&__hsdp=gbY8gy8ApMm72A66GIVrQfpBasoe4PgiOaOa4WVkJavppd4odomy9QLCpC8AAQFBhWQmCy5TuLEypGBuF5zpGG9F1am3byXhAV4A58a9GnBSEigTykUoKq9Dxa4pEqUICXzESqiumGwnEOpxJ7xadybCx92p4eAwUwAyEiglway1dyrwDz-0ZoO10Ugy85-3C58K2eEtwjU4y684W1OwiJ4wjEoy8kwiU4S&__hblp=0tC0CGAgPxhBoO9x2eE4BkYgbqWZRbrdq9kMea-DAelMxR4YnsROhakgxandb4tH7lA8c95dFmAeFrBwCeheOljJF7i_G4GGutnlmJmGzO5BSnjyQt9XExFQicoZfgKd-CgZd5n8EGr8uSGg5ScCopQu4ES8Kq4A9AgWi3y2iax91aE2EwjoCU9UB4UmwdWcwge48y1vwVxibwzG7omjgoxC18xy262O1OwiJ4wip8oy8kxQ9y9Q9yhdwTw&__sjsp=gbY8gy8ApMm72Ah1eu4Z1-&__comet_req=17&__spin_r=1048249751&__spin_b=trunk&__spin_t=1790179138 — 200 — 801 B — 158 ms — h3https://static.whatsapp.net/rsrc.php/v4/yo/r/7EDKZola6eR.jsstatic.whatsapp.net/rsrc.php/v4/yo/... https://static.whatsapp.net/rsrc.php/v4/yo/r/7EDKZola6eR.js — 200 — 37.1 KiB — 26 ms — h3https://web.whatsapp.com/favicon/1x/favicon/v4//favicon/1x/favicon/v4/ https://web.whatsapp.com/favicon/1x/favicon/v4/ — 200 — 392 B — 40 ms — h3https://static.whatsapp.net/btmanifest/1048249751/whatsapp/mainstatic.whatsapp.net/btmanifest/1048... https://static.whatsapp.net/btmanifest/1048249751/whatsapp/main — 200 — 168.7 KiB — 28 ms — h3https://static.whatsapp.net/rsrc.php/v4/yf/r/9BUnR6WFKwO.jsstatic.whatsapp.net/rsrc.php/v4/yf/... https://static.whatsapp.net/rsrc.php/v4/yf/r/9BUnR6WFKwO.js — 200 — 151.0 KiB — 28 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://web.whatsapp.com/favicon/1x/favicon/v4//favicon/1x/favicon/v4/ https://web.whatsapp.com/favicon/1x/favicon/v4/ — 200 — 0 B — 5 ms — h3https://web.whatsapp.com/ajax/bz?__a=1&__ccg=UNKNOWN&__comet_req=17&__hs=20719.HYP%3Awhatsapp_comet_pkg.2.1...0&__hsi=7688760851884650728&__req=2&__rev=1048249751&__s=ez0nrv%3Alqcniw%3Akh9md7&__spin_b=trunk&__spin_r=1048249751&__spin_t=1790179138&__user=0&dpr=2&jazoest=21990&lsd=sq9HsKLeeorXAsGKfHXHPp&ph=C3/ajax/bz?__a=1&__ccg=UNKNOWN&__come... https://web.whatsapp.com/ajax/bz?__a=1&__ccg=UNKNOWN&__comet_req=17&__hs=20719.HYP%3Awhatsapp_comet_pkg.2.1...0&__hsi=7688760851884650728&__req=2&__rev=1048249751&__s=ez0nrv%3Alqcniw%3Akh9md7&__spin_b=trunk&__spin_r=1048249751&__spin_t=1790179138&__user=0&dpr=2&jazoest=21990&lsd=sq9HsKLeeorXAsGKfHXHPp&ph=C3 — 200 — 224 B — 153 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
80% of JavaScript execution is third-party
First-party Third-party 1744ms · 3920KB · $23/mo
static.whatsapp.net
Other
Costly
Execution 799ms
Transfer 77 KB
Unused 45%
Monthly Cost $11/mo
static.whatsapp.net
Other
Costly
Execution 546ms
Transfer 835 KB
Unused 70%
Monthly Cost $7/mo
static.whatsapp.net
Other
Optional
Execution 155ms
Transfer 1362 KB
Unused 90%
Monthly Cost $2/mo
static.whatsapp.net
Other
Optional
Execution 131ms
Transfer 731 KB
Unused 89%
Monthly Cost $2/mo
static.whatsapp.net
Other
Optional
Execution 59ms
Transfer 405 KB
Unused 89%
Monthly Cost $1/mo
static.whatsapp.net
Other
Optional
Execution 54ms
Transfer 510 KB
Unused 76%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • static.whatsapp.net adds 799ms and costs ~$11/month
  • static.whatsapp.net adds 546ms and costs ~$7/month

80% 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.

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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 799ms 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 546ms 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

70% 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

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

76% 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

Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-08-25 — 2026-09-21)

LCP (p75)

14486 ms

21% good

INP (p75)

626 ms

25% good

CLS (p75)

0.050

84% good

FCP (p75)

1757 ms

TTFB (p75)

797 ms

Image Optimization
1 images, 5 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

1

Total Size

5 KB

1 missing alt text 1 missing dimensions
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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