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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
83
GRADE
B
FIX
5
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
85
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

1.21 s

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

2.29 s

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

2 ms

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

0.028

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

1.21 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.

2.29 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
D
Page Weight Budget
Action
2.3 MB transferred, 45 requests
FIX
2.3 MB transferred, 45 requests
Info::
Page weighs 5.7 MB (2.3 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 843 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 843 KB
Info::
CSS is 248 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 248 KB
Info::
45 HTTP requests
Info::
Estimated 0.49 g CO2 per page load
2.3 MB / 2.4 MB budget
2.3 MB transferred
45 requests
0.49 g CO2 per page load
Images 1.1 MiB 47%
JavaScript 842.7 KiB 35%
CSS 248.3 KiB 10%
Fonts 80.6 KiB 3%
Other 66.3 KiB 3%
HTML 35.8 KiB 1%
Other 7.2 KiB 0%
Other 671 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

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

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 (2.3 MiB of 2.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
29 scripts, 503 KB unused
FIX
29 scripts, 503 KB unused
Warning::
https://static.xx.fbcdn.net/rsrc.php/v4iiKm4/ym/l/...: 140 KB unused (82%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.xx.fbcdn.net/rsrc.php/v4iSVk4/yF/l/...: 106 KB unused (95%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.xx.fbcdn.net/rsrc.php/v4iLl54/yj/l/...: 60 KB unused (90%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.xx.fbcdn.net/rsrc.php/v4i-QG4/yX/l/...: 59 KB unused (92%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.xx.fbcdn.net/rsrc.php/v4id3L4/yu/l/...: 41 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 503 KB
503 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.xx.fbcdn.net/rsrc.php/v4iiKm4/ym/l/en_US-j/gDdg-mDQn2x.js171 KB140 KB (82%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4iSVk4/yF/l/en_US-j/e6sU11ZLGOT.js111 KB106 KB (95%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4iLl54/yj/l/en_US-j/-XU58s-lWx7.js67 KB60 KB (90%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4i-QG4/yX/l/en_US-j/m3qYAH78sgC.js65 KB59 KB (92%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4id3L4/yu/l/en_US-j/PSkT-swUq1r.js77 KB41 KB (54%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4ixe44/yM/l/en_US-j/zDA944MwI6s.js57 KB38 KB (67%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4/y6/r/n80KC3B7ON5.js93 KB37 KB (40%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4i-G04/yp/l/en_US-j/TdNUg8XiUtZ.js25 KB23 KB (93%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4inR74/yF/l/en_US-j/1Sdt-QRdGPb.js10 KB—✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4/yA/r/usZEX3p5yjF.js4 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

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
45 resources · 2.3 MB · 503 KB savings available
FIX
45 resources · 2.3 MB · 503 KB savings available
Warning::
Page weight 1.3 MB over 1MB target
Got: 2.3 MB Expected: ≤ 1 MB
Info::
~503 KB of savings available
Warning::
44 third-party resources (100% of weight)
Info::
2 resources over 200KB
45 resources · 2.3 MiB · 44 third-party 1.3 MiB over 1MB target
Image 49% · 1.2 MiB
JavaScript 35% · 849.9 KiB
CSS 10% · 248.3 KiB
Font 3% · 80.6 KiB
Document 1% · 35.9 KiB
Other 0% · 671 B

~503.2 KiB of savings available

Remove unused JavaScript: 503.2 KiB
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
Image Optimization
4 images, 0 KB saveable
REVIEW
4 images, 0 KB saveable
Warning::
https://scontent-xxc1-1.xx.fbcdn.net/v/t39.8562-6/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://scontent-xxc1-1.xx.fbcdn.net/v/t39.8562-6/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
4 images 1.1 MB
0 oversized -0 KB
4 legacy format
2 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

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+
JS Execution Cost
311ms total JS execution
PASS
311ms total JS execution
Info::
https://www.messenger.com/: 131ms CPU time
Info::
Unattributable: 96ms CPU time
Info::
https://static.xx.fbcdn.net/rsrc.php/v4/y6/r/n80KC...: 84ms CPU time
Warning::
Third-party scripts: 311ms (100% of total)

Main Thread Breakdown

Script Evaluation 40% Other 21% Script Parsing & Compilation 20% Style & Layout 10% Parse HTML & CSS 6%
ScriptTotalScriptingParse/CompileParty
https://www.messenger.com/131ms47ms7ms3rd
Unattributable96ms2ms0ms3rd
https://static.xx.fbcdn.net/rsrc.php/v4/y6/r/n80KC3B7ON5.js84ms58ms11ms3rd
A+
Font Loading
3 fonts (81 KB)
PASS
3 fonts (81 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

81 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 500 ms 1.0 s 1.5 s 2.0 s FCP 1.2 s LCP 2.3 shttps://static.xx.fbcdn.net/rsrc.php/yX/r/KLj_xKLeqTV.woff2KLj_xKLeqTV.woff2 https://static.xx.fbcdn.net/rsrc.php/yX/r/KLj_xKLeqTV.woff2 — 25.2 KiB — 10 ms — font-display: swaphttps://static.xx.fbcdn.net/rsrc.php/yZ/r/mBPexExW31x.woff2mBPexExW31x.woff2 https://static.xx.fbcdn.net/rsrc.php/yZ/r/mBPexExW31x.woff2 — 24.5 KiB — 10 ms — font-display: swaphttps://static.xx.fbcdn.net/rsrc.php/yT/r/HWVCvIuXDLN.woff2HWVCvIuXDLN.woff2 https://static.xx.fbcdn.net/rsrc.php/yT/r/HWVCvIuXDLN.woff2 — 30.9 KiB — 11 ms — font-display: swap
KLj_xKLeqTV.woff2 woff2 swap
Size 25 KB
Load time 10 ms
Start 442 ms
Risk FOUT — text flashes from fallback to web font
mBPexExW31x.woff2 woff2 swap
Size 25 KB
Load time 10 ms
Start 442 ms
Risk FOUT — text flashes from fallback to web font
HWVCvIuXDLN.woff2 woff2 swap
Size 31 KB
Load time 11 ms
Start 540 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
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
45 requests over 1659ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.2 s LCP 2.3 shttps://m.me// https://m.me/ — 302 — 126 B — 68 ms — h3https://www.messenger.com/www.messenger.com/ https://www.messenger.com/ — 200 — 35.8 KiB — 183 ms — h3https://static.xx.fbcdn.net/rsrc.php/v5/yX/l/0,cross/3JhLsOG053b.cssstatic.xx.fbcdn.net/rsrc.php/v5/yX/... https://static.xx.fbcdn.net/rsrc.php/v5/yX/l/0,cross/3JhLsOG053b.css — 200 — 9.3 KiB — 20 ms — h3https://static.xx.fbcdn.net/rsrc.php/v5/yJ/l/0,cross/-JjobdlPhwa.cssstatic.xx.fbcdn.net/rsrc.php/v5/yJ/... https://static.xx.fbcdn.net/rsrc.php/v5/yJ/l/0,cross/-JjobdlPhwa.css — 200 — 4.6 KiB — 15 ms — h3https://static.xx.fbcdn.net/rsrc.php/v5/yA/l/0,cross/rFjJad0W6Wz.cssstatic.xx.fbcdn.net/rsrc.php/v5/yA/... https://static.xx.fbcdn.net/rsrc.php/v5/yA/l/0,cross/rFjJad0W6Wz.css — 200 — 2.9 KiB — 21 ms — h3https://static.xx.fbcdn.net/rsrc.php/v5/yB/l/0,cross/Ub3N3UJ4z_h.cssstatic.xx.fbcdn.net/rsrc.php/v5/yB/... https://static.xx.fbcdn.net/rsrc.php/v5/yB/l/0,cross/Ub3N3UJ4z_h.css — 200 — 230.8 KiB — 42 ms — h3https://static.xx.fbcdn.net/rsrc.php/v4/y6/r/n80KC3B7ON5.jsstatic.xx.fbcdn.net/rsrc.php/v4/y6/... https://static.xx.fbcdn.net/rsrc.php/v4/y6/r/n80KC3B7ON5.js — 200 — 92.9 KiB — 46 ms — h3https://scontent-xxc1-1.xx.fbcdn.net/v/t39.8562-6/475210330_598195142840489_9172482348551739153_n.png?_nc_cat=1&ccb=1-7&_nc_sid=f537c7&_nc_ohc=BK9F4jeE3_AQ7kNvwHsMA8L&_nc_oc=Adq9FRDiLDBmUSTkuipHUGcMuWInITQpVCjqmi1ziLk7IVOhs1iK0RJi6t81wqXwihlHZQKg29kEjj7UD28zPefh&_nc_zt=14&_nc_ht=scontent-xxc1-1.xx&_nc_gid=q7-FGvqdX_BuTajC9zjm7Q&_nc_ss=7a389&oh=00_Af0n-G2FmPGNVnBYgcjlcZrdzHYykWueBRFY7L59grLMig&oe=69ED91D8scontent-xxc1-1.xx.fbcdn.net/v/t39.... https://scontent-xxc1-1.xx.fbcdn.net/v/t39.8562-6/475210330_598195142840489_9172482348551739153_n.png?_nc_cat=1&ccb=1-7&_nc_sid=f537c7&_nc_ohc=BK9F4jeE3_AQ7kNvwHsMA8L&_nc_oc=Adq9FRDiLDBmUSTkuipHUGcMuWInITQpVCjqmi1ziLk7IVOhs1iK0RJi6t81wqXwihlHZQKg29kEjj7UD28zPefh&_nc_zt=14&_nc_ht=scontent-xxc1-1.xx&_nc_gid=q7-FGvqdX_BuTajC9zjm7Q&_nc_ss=7a389&oh=00_Af0n-G2FmPGNVnBYgcjlcZrdzHYykWueBRFY7L59grLMig&oe=69ED91D8 — 200 — 2.0 KiB — 40 ms — h3https://scontent-xxc1-1.xx.fbcdn.net/v/t39.8562-6/474725753_1358504298471525_8447910813089343782_n.png?_nc_cat=106&ccb=1-7&_nc_sid=f537c7&_nc_ohc=qPXa5eb8Gw8Q7kNvwH_lsOh&_nc_oc=AdqacSjkZZ_FEMDVbaxmOmNAsnObNuFfqUFH8nRydw2P_FOGpIWA6RpC0SLMBuuU80ifRltrUgx6B446v_mJXO0C&_nc_zt=14&_nc_ht=scontent-xxc1-1.xx&_nc_gid=q7-FGvqdX_BuTajC9zjm7Q&_nc_ss=7a389&oh=00_Af239lfLehoB5VvSSxXmEUNJH8NVCVyrHZxPCuy5-nlzOQ&oe=69ED9B56scontent-xxc1-1.xx.fbcdn.net/v/t39.... https://scontent-xxc1-1.xx.fbcdn.net/v/t39.8562-6/474725753_1358504298471525_8447910813089343782_n.png?_nc_cat=106&ccb=1-7&_nc_sid=f537c7&_nc_ohc=qPXa5eb8Gw8Q7kNvwH_lsOh&_nc_oc=AdqacSjkZZ_FEMDVbaxmOmNAsnObNuFfqUFH8nRydw2P_FOGpIWA6RpC0SLMBuuU80ifRltrUgx6B446v_mJXO0C&_nc_zt=14&_nc_ht=scontent-xxc1-1.xx&_nc_gid=q7-FGvqdX_BuTajC9zjm7Q&_nc_ss=7a389&oh=00_Af239lfLehoB5VvSSxXmEUNJH8NVCVyrHZxPCuy5-nlzOQ&oe=69ED9B56 — 200 — 1.1 MiB — 97 ms — h3https://scontent-xxc1-1.xx.fbcdn.net/v/t39.8562-6/474824981_899577288719610_6588160745649017665_n.png?_nc_cat=1&ccb=1-7&_nc_sid=f537c7&_nc_ohc=VbWZ3ueKhjUQ7kNvwHn1MTH&_nc_oc=AdqR4l0bOaojkc_7HNFlT6-3WUVNJfWvbak3pgIwVeURMweHW-OxqB7gSDrfgyY00a0_h1R1kblrV8OlMJwTckZm&_nc_zt=14&_nc_ht=scontent-xxc1-1.xx&_nc_gid=q7-FGvqdX_BuTajC9zjm7Q&_nc_ss=7a389&oh=00_Af3YaTTQQmgKLi1LLrPPCX7vNizaSMCJKN172EbRYbLhlw&oe=69ED9C9Fscontent-xxc1-1.xx.fbcdn.net/v/t39.... https://scontent-xxc1-1.xx.fbcdn.net/v/t39.8562-6/474824981_899577288719610_6588160745649017665_n.png?_nc_cat=1&ccb=1-7&_nc_sid=f537c7&_nc_ohc=VbWZ3ueKhjUQ7kNvwHn1MTH&_nc_oc=AdqR4l0bOaojkc_7HNFlT6-3WUVNJfWvbak3pgIwVeURMweHW-OxqB7gSDrfgyY00a0_h1R1kblrV8OlMJwTckZm&_nc_zt=14&_nc_ht=scontent-xxc1-1.xx&_nc_gid=q7-FGvqdX_BuTajC9zjm7Q&_nc_ss=7a389&oh=00_Af3YaTTQQmgKLi1LLrPPCX7vNizaSMCJKN172EbRYbLhlw&oe=69ED9C9F — 200 — 4.0 KiB — 12 ms — h3https://static.xx.fbcdn.net/rsrc.php/v4/y0/r/t7lGWEPy_6C.jsstatic.xx.fbcdn.net/rsrc.php/v4/y0/... https://static.xx.fbcdn.net/rsrc.php/v4/y0/r/t7lGWEPy_6C.js — 200 — 10.9 KiB — 7 ms — h3https://static.xx.fbcdn.net/rsrc.php/v4i7M54/yH/l/en_US-j/9yB_6lODTmy.jsstatic.xx.fbcdn.net/rsrc.php/v4i7M5... https://static.xx.fbcdn.net/rsrc.php/v4i7M54/yH/l/en_US-j/9yB_6lODTmy.js — 200 — 32.8 KiB — 9 ms — h3https://static.xx.fbcdn.net/rsrc.php/v4/yf/r/DKlJbcVkdvf.jsstatic.xx.fbcdn.net/rsrc.php/v4/yf/... https://static.xx.fbcdn.net/rsrc.php/v4/yf/r/DKlJbcVkdvf.js — 200 — 3.3 KiB — 7 ms — h3https://static.xx.fbcdn.net/rsrc.php/v4/yG/r/W7UWgXsIXui.jsstatic.xx.fbcdn.net/rsrc.php/v4/yG/... https://static.xx.fbcdn.net/rsrc.php/v4/yG/r/W7UWgXsIXui.js — 200 — 19.3 KiB — 13 ms — h3https://static.xx.fbcdn.net/rsrc.php/v4id3L4/yu/l/en_US-j/PSkT-swUq1r.jsstatic.xx.fbcdn.net/rsrc.php/v4id3L... https://static.xx.fbcdn.net/rsrc.php/v4id3L4/yu/l/en_US-j/PSkT-swUq1r.js — 200 — 76.8 KiB — 14 ms — h3https://static.xx.fbcdn.net/rsrc.php/v4/yc/r/rpfMLL96Fwl.jsstatic.xx.fbcdn.net/rsrc.php/v4/yc/... https://static.xx.fbcdn.net/rsrc.php/v4/yc/r/rpfMLL96Fwl.js — 200 — 9.2 KiB — 11 ms — h3https://static.xx.fbcdn.net/rsrc.php/v5/yN/l/0,cross/Iwh7nm4-vTj.cssstatic.xx.fbcdn.net/rsrc.php/v5/yN/... https://static.xx.fbcdn.net/rsrc.php/v5/yN/l/0,cross/Iwh7nm4-vTj.css — 200 — 819 B — 11 ms — h3https://www.messenger.com/data/manifest/?is_workplace_mobile_pwa_dogfooding=0www.messenger.com/data/manifest/?is... https://www.messenger.com/data/manifest/?is_workplace_mobile_pwa_dogfooding=0 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https://www.messenger.com/ajax/bootloader-endpoint/?modules=MWForgotPasswordDialog.react&__aaid=0&__user=0&__a=1&__req=2&__hs=20564.BP%3Amessengerdotcom_pkg.2.0...0&dpr=2&__ccg=EXCELLENT&__rev=1037799039&__s=zul2c4%3Ac4o0tl%3A4mw8pw&__hsi=7631289654749839540&__dyn=7xe6E5aQ1PyUbFp41twpUnwgU6C7UW1DxW0SU1nEhw2nVE4W099wooa87i0n24o5-16wf50Fw4Hw9O0M82TwVw9O0Ho2ewnE0Caaw4kwbS1Lw60wr83ew4kwtU7m0O80Gm0YE&__hsdp=g92i1b3p0j0&__hblp=0mE6q8F7wa21iwn83vwwptkyy4u1pxi&__spin_r=1037799039&__spin_b=trunk&__spin_t=1776798082&__jssesw=1 — 200 — 3.6 KiB — 77 ms — h3https://static.xx.fbcdn.net/rsrc.php/v4/yA/r/WaQSXVdZmgs.jsstatic.xx.fbcdn.net/rsrc.php/v4/yA/... https://static.xx.fbcdn.net/rsrc.php/v4/yA/r/WaQSXVdZmgs.js — 200 — 1.9 KiB — 53 ms — h3https://www.messenger.com/ajax/bootloader-endpoint/?modules=BaseTooltip.react%2CMDSTooltipImpl.react&__aaid=0&__user=0&__a=1&__req=3&__hs=20564.BP%3Amessengerdotcom_pkg.2.0...0&dpr=2&__ccg=EXCELLENT&__rev=1037799039&__s=zul2c4%3Ac4o0tl%3A4mw8pw&__hsi=7631289654749839540&__dyn=7xe6E5aQ1PyUbFp41twpUnwgU6C7UW1DxW0SU1nEhw2nVE4W099wooa87i0n24o5-16wf50Fw4Hw9O0M82TwVw9O0Ho2ewnE0Caaw4kwbS1Lw60wr83ew4kwtU7m0O80Gm0YE&__hsdp=g92i1b3p0j0&__hblp=0mE6q8F7wa21iwn83vwwptkyy4u1pxi&__spin_r=1037799039&__spin_b=trunk&__spin_t=1776798082&__jssesw=1www.messenger.com/ajax/bootloader-e... https://www.messenger.com/ajax/bootloader-endpoint/?modules=BaseTooltip.react%2CMDSTooltipImpl.react&__aaid=0&__user=0&__a=1&__req=3&__hs=20564.BP%3Amessengerdotcom_pkg.2.0...0&dpr=2&__ccg=EXCELLENT&__rev=1037799039&__s=zul2c4%3Ac4o0tl%3A4mw8pw&__hsi=7631289654749839540&__dyn=7xe6E5aQ1PyUbFp41twpUnwgU6C7UW1DxW0SU1nEhw2nVE4W099wooa87i0n24o5-16wf50Fw4Hw9O0M82TwVw9O0Ho2ewnE0Caaw4kwbS1Lw60wr83ew4kwtU7m0O80Gm0YE&__hsdp=g92i1b3p0j0&__hblp=0mE6q8F7wa21iwn83vwwptkyy4u1pxi&__spin_r=1037799039&__spin_b=trunk&__spin_t=1776798082&__jssesw=1 — 200 — 3.1 KiB — 119 ms — h3https://static.xx.fbcdn.net/rsrc.php/yO/r/qa11ER6rke_.icostatic.xx.fbcdn.net/rsrc.php/yO/r/q... https://static.xx.fbcdn.net/rsrc.php/yO/r/qa11ER6rke_.ico — 200 — 66.2 KiB — 36 ms — h3https://www.messenger.com/ajax/bz?__a=1&__aaid=0&__ccg=EXCELLENT&__dyn=7xe6E5aQ1PyUbFp41twpUnwgU6C7UW1DxW0SU1nEhw2nVE4W099wooa87i0n24o5-16wf50Fw4Hw9O0M82TwVw9O0Ho2ewnE0Caaw4kwbS1Lw60wr83ew4kwtU7m0O80Gm0YE&__hs=20564.BP%3Amessengerdotcom_pkg.2.0...0&__hsi=7631289654749839540&__jssesw=1&__req=4&__rev=1037799039&__s=zul2c4%3Ac4o0tl%3A4mw8pw&__spin_b=trunk&__spin_r=1037799039&__spin_t=1776798082&__user=0&dpr=2&jazoest=22220&lsd=AdQjTl4Me3HpPMZtBqHDb1pY35Mwww.messenger.com/ajax/bz?__a=1&__a... https://www.messenger.com/ajax/bz?__a=1&__aaid=0&__ccg=EXCELLENT&__dyn=7xe6E5aQ1PyUbFp41twpUnwgU6C7UW1DxW0SU1nEhw2nVE4W099wooa87i0n24o5-16wf50Fw4Hw9O0M82TwVw9O0Ho2ewnE0Caaw4kwbS1Lw60wr83ew4kwtU7m0O80Gm0YE&__hs=20564.BP%3Amessengerdotcom_pkg.2.0...0&__hsi=7631289654749839540&__jssesw=1&__req=4&__rev=1037799039&__s=zul2c4%3Ac4o0tl%3A4mw8pw&__spin_b=trunk&__spin_r=1037799039&__spin_t=1776798082&__user=0&dpr=2&jazoest=22220&lsd=AdQjTl4Me3HpPMZtBqHDb1pY35M — 200 — 218 B — 72 ms — h3
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 311ms · 129KB · $4/mo
www.messenger.com
Other
Optional
Execution 131ms
Transfer 36 KB
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 96ms
Transfer 0 KB
Monthly Cost $1/mo
static.xx.fbcdn.net
Other
Optional
Execution 84ms
Transfer 93 KB
Unused 40%
Monthly Cost $1/mo

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

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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