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https://m.facebook.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
83
GRADE
B
FIX
4
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
76
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.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.56 s

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

2.84 s

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

110 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.

1.56 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.

2.85 s

Page Load Progression

563 ms
1.1 s
1.7 s
2.3 s
2.8 s
3.4 s
3.9 s
4.5 s
Checks
15
6 PASS 3 REVIEW 4 FIX
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 (2.0 MiB of 2.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
29 scripts, 801 KB unused
FIX
29 scripts, 801 KB unused
Warning::
https://static.xx.fbcdn.net/rsrc.php/v4iSJ94/yz/l/...: 161 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.xx.fbcdn.net/rsrc.php/v4iSVg4/yu/l/...: 114 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.xx.fbcdn.net/rsrc.php/v4iKxu4/ym/l/...: 83 KB unused (95%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.xx.fbcdn.net/rsrc.php/v4/yU/r/DcrX2...: 76 KB unused (100%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.xx.fbcdn.net/rsrc.php/v4izQ_4/y7/l/...: 72 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 801 KB
801 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.xx.fbcdn.net/rsrc.php/v4iSJ94/yz/l/en_GB-j/4tQwhPZghFanKt83K8bFOY8FRnWc_RghZQt77v8QrxHexAv_03sE6NmmF4EGzH400h4j4SE1-LXf27jazmKZjbThLMusfBKLXXDY0YjxOowOmBw1JtOGoHMq0Th14Xk8e9Sku4yAsukPWHDn88f8LPFIFZLBRhzS-4DyAC8lbkhBm8OT49U1YTT9NT_0Z9aRAvLoiQv4bLhpa--wr3g9q4pR78qLBHl-lElGzTHOl6Gkjq0OVeavkZc4HIHnCg4LyRJkkmesJZCcc2ZP1Mq8wypiAW_bfkF94AKekI-DNEnGBkPcwRUWAdmh5DEndjkC1LYw5WWi7I.js237 KB161 KB (68%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4iSVg4/yu/l/en_GB-j/JshSlPNui4y.js233 KB114 KB (49%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4iKxu4/ym/l/en_GB-j/ws7IXxtAyPQ.js87 KB83 KB (95%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4/yU/r/DcrX2w7W64E.js76 KB76 KB (100%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4izQ_4/y7/l/en_GB-j/AWX5t7ZgVWvzJ1cK8WBm1uWJukooR-9NveYAiEtFyMlqRi7mWBMSxEcAv3wM14GGu4PxbyW25xWkKVIPNHOqVL96B5bIoMrIaeQ_uK3aPyME2raTvLpEMiMqY.js97 KB72 KB (74%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4iQnF4/y7/l/en_GB-j/eXuNl-hBb1X.js101 KB56 KB (56%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4/yF/r/0gdcbeCC4AI.js57 KB53 KB (94%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4iDQn4/yH/l/en_GB-j/Yo3wuewMTur.js60 KB51 KB (85%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4/yV/r/ce-O1eEeZ9o.js73 KB38 KB (52%)✓3rd
https://static.xx.fbcdn.net/rsrc.php/v4iU7G4/yG/l/en_GB-j/l6avTjI3B2e.js50 KB37 KB (73%)✓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
38 resources · 2.0 MB · 801 KB savings available
FIX
38 resources · 2.0 MB · 801 KB savings available
Warning::
Page weight 981 KB over 1MB target
Got: 2.0 MB Expected: ≤ 1 MB
Info::
~801 KB of savings available
Warning::
37 third-party resources (100% of weight)
Info::
3 resources over 200KB
38 resources · 2.0 MiB · 37 third-party 981.3 KiB over 1MB target
JavaScript 61% · 1.2 MiB
CSS 15% · 301.5 KiB
Font 10% · 208.4 KiB
Image 10% · 193.6 KiB
Document 4% · 73.8 KiB

~801.4 KiB of savings available

Remove unused JavaScript: 801.4 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
C
Page Weight Budget
Action
2.0 MB transferred, 38 requests
REVIEW
2.0 MB transferred, 38 requests
Info::
Page weighs 7.2 MB (2.0 MB transferred)
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Info::
CSS is 302 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 302 KB
Info::
Fonts are 208 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 208 KB
Info::
38 HTTP requests
Info::
Estimated 0.41 g CO2 per page load
2.0 MB / 2.4 MB budget
2.0 MB transferred
38 requests
0.41 g CO2 per page load
JavaScript 1.2 MiB 61%
CSS 301.5 KiB 15%
Fonts 208.4 KiB 10%
Images 173.6 KiB 9%
HTML 73.7 KiB 4%
Other 20.1 KiB 1%
Other 623 B 0%
Other 224 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

B
JS Execution Cost
848ms total JS execution
REVIEW
848ms total JS execution
Warning::
https://static.xx.fbcdn.net/rsrc.php/v4/yV/r/ce-O1...: 436ms CPU time
Info::
https://static.xx.fbcdn.net/rsrc.php/v4iQnF4/y7/l/...: 164ms CPU time
Info::
https://www.facebook.com/?_rdr: 155ms CPU time
Info::
Unattributable: 93ms CPU time
Warning::
Third-party scripts: 848ms (100% of total)

Main Thread Breakdown

Script Evaluation 41% Other 24% Script Parsing & Compilation 19% Style & Layout 10% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://static.xx.fbcdn.net/rsrc.php/v4/yV/r/ce-O1eEeZ9o.js436ms388ms35ms3rd
https://static.xx.fbcdn.net/rsrc.php/v4iQnF4/y7/l/en_GB-j/eXuNl-hBb1X.js164ms6ms13ms3rd
https://www.facebook.com/?_rdr155ms9ms0ms3rd
Unattributable93ms6ms0ms3rd
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
Warning::
https://static.xx.fbcdn.net/rsrc.php/yB/r/83zWJdc6... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
1 images 174 KB
0 oversized -0 KB
0 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

A+
Font Loading
2 fonts (208 KB)
PASS
2 fonts (208 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

208 KB total

Render-blocking

0

of 2

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 2.5 s FCP 1.6 s LCP 2.8 shttps://static.xx.fbcdn.net/rsrc.php/yl/r/9AJbVCy4-G1.woff29AJbVCy4-G1.woff2 https://static.xx.fbcdn.net/rsrc.php/yl/r/9AJbVCy4-G1.woff2 — 29.4 KiB — 9 ms — font-display: swaphttps://static.xx.fbcdn.net/rsrc.php/yQ/r/-pkMfchyeAZ.woff2-pkMfchyeAZ.woff2 https://static.xx.fbcdn.net/rsrc.php/yQ/r/-pkMfchyeAZ.woff2 — 179.1 KiB — 26 ms — font-display: swap
9AJbVCy4-G1.woff2 woff2 swap
Size 29 KB
Load time 9 ms
Start 747 ms
Risk FOUT — text flashes from fallback to web font
-pkMfchyeAZ.woff2 woff2 swap
Size 179 KB
Load time 26 ms
Start 747 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 ~90 KB and ~180 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
38 requests over 2382ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.6 s LCP 2.8 shttps://m.facebook.com// https://m.facebook.com/ — 301 — 103 B — 170 ms — h3https://www.facebook.com/?_rdrwww.facebook.com/?_rdr https://www.facebook.com/?_rdr — 200 — 73.7 KiB — 540 ms — h3https://static.xx.fbcdn.net/rsrc.php/v5/yo/l/0,cross/Ub3N3UJ4z_hSRcPYBIrKwmoii7yv5XgLOT9DWDYPz6DhfgQe914iiBfONMKn3YhINqU49pVNahkCkvOJ4AbSr5wE.cssstatic.xx.fbcdn.net/rsrc.php/v5/yo/... https://static.xx.fbcdn.net/rsrc.php/v5/yo/l/0,cross/Ub3N3UJ4z_hSRcPYBIrKwmoii7yv5XgLOT9DWDYPz6DhfgQe914iiBfONMKn3YhINqU49pVNahkCkvOJ4AbSr5wE.css — 200 — 270.6 KiB — 40 ms — h3data:text/css; charset=utf-8,.vrhKlE1b.vrhKlE1b%7Bposition%3Aabsolute%7D.hekj.hekj%7Btop%3A3em%7D%0Adata:text/css; charset=utf-8,.vrhKl... data:text/css; charset=utf-8,.vrhKlE1b.vrhKlE1b%7Bposition%3Aabsolute%7D.hekj.hekj%7Btop%3A3em%7D%0A — 200 — 0 B — 0 ms — datadata: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,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,Oy8qRkJfUEtHX0RFTElNKi8KCihmdW5jdGlvbigpe2Z1bmN…data:application/x-javascript; char... data:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCihmdW5jdGlvbigpe2Z1bmN… — 200 — 0 B — 0 ms — datahttps://www.facebook.com/ajax/qm/?__a=1&__user=0&__comet_req=15&jazoest=21978www.facebook.com/ajax/qm/?__a=1&__u... https://www.facebook.com/ajax/qm/?__a=1&__user=0&__comet_req=15&jazoest=21978 — 200 — 224 B — 361 ms — h3data:text/javascript;base64,cmVxdWlyZUxhenkoWyJTZXJ2ZXJKU1BheWxvYWRMaXN0ZW5lciJdLGZ1bmN0aW9uKG0pe20…data:text/javascript;base64,cmVxdWl... data:text/javascript;base64,cmVxdWlyZUxhenkoWyJTZXJ2ZXJKU1BheWxvYWRMaXN0ZW5lciJdLGZ1bmN0aW9uKG0pe20… — 200 — 0 B — 0 ms — datahttps://static.xx.fbcdn.net/rsrc.php/yl/r/9AJbVCy4-G1.woff2static.xx.fbcdn.net/rsrc.php/yl/r/9... https://static.xx.fbcdn.net/rsrc.php/yl/r/9AJbVCy4-G1.woff2 — 200 — 29.4 KiB — 9 ms — h3https://static.xx.fbcdn.net/rsrc.php/yQ/r/-pkMfchyeAZ.woff2static.xx.fbcdn.net/rsrc.php/yQ/r/-... https://static.xx.fbcdn.net/rsrc.php/yQ/r/-pkMfchyeAZ.woff2 — 200 — 179.1 KiB — 26 ms — h3data:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCiJ1c2Ugc3RyaWN0Ijt2YXI…data:application/x-javascript; char... data:application/x-javascript; charset=utf-8;base64,Oy8qRkJfUEtHX0RFTElNKi8KCiJ1c2Ugc3RyaWN0Ijt2YXI… — 200 — 0 B — 0 ms — datahttps://static.xx.fbcdn.net/rsrc.php/v4/yV/r/ce-O1eEeZ9o.jsstatic.xx.fbcdn.net/rsrc.php/v4/yV/... https://static.xx.fbcdn.net/rsrc.php/v4/yV/r/ce-O1eEeZ9o.js — 200 — 72.6 KiB — 28 ms — h3https://static.xx.fbcdn.net/rsrc.php/v4iSJ94/yz/l/en_GB-j/4tQwhPZghFanKt83K8bFOY8FRnWc_RghZQt77v8QrxHexAv_03sE6NmmF4EGzH400h4j4SE1-LXf27jazmKZjbThLMusfBKLXXDY0YjxOowOmBw1JtOGoHMq0Th14Xk8e9Sku4yAsukPWHDn88f8LPFIFZLBRhzS-4DyAC8lbkhBm8OT49U1YTT9NT_0Z9aRAvLoiQv4bLhpa--wr3g9q4pR78qLBHl-lElGzTHOl6Gkjq0OVeavkZc4HIHnCg4LyRJkkmesJZCcc2ZP1Mq8wypiAW_bfkF94AKekI-DNEnGBkPcwRUWAdmh5DEndjkC1LYw5WWi7I.jsstatic.xx.fbcdn.net/rsrc.php/v4iSJ9... https://static.xx.fbcdn.net/rsrc.php/v4iSJ94/yz/l/en_GB-j/4tQwhPZghFanKt83K8bFOY8FRnWc_RghZQt77v8QrxHexAv_03sE6NmmF4EGzH400h4j4SE1-LXf27jazmKZjbThLMusfBKLXXDY0YjxOowOmBw1JtOGoHMq0Th14Xk8e9Sku4yAsukPWHDn88f8LPFIFZLBRhzS-4DyAC8lbkhBm8OT49U1YTT9NT_0Z9aRAvLoiQv4bLhpa--wr3g9q4pR78qLBHl-lElGzTHOl6Gkjq0OVeavkZc4HIHnCg4LyRJkkmesJZCcc2ZP1Mq8wypiAW_bfkF94AKekI-DNEnGBkPcwRUWAdmh5DEndjkC1LYw5WWi7I.js — 200 — 236.9 KiB — 37 ms — h3https://static.xx.fbcdn.net/rsrc.php/v4iSVg4/yu/l/en_GB-j/JshSlPNui4y.jsstatic.xx.fbcdn.net/rsrc.php/v4iSVg... 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h3https://static.xx.fbcdn.net/rsrc.php/y1/r/ay1hV6OlegS.icostatic.xx.fbcdn.net/rsrc.php/y1/r/a... https://static.xx.fbcdn.net/rsrc.php/y1/r/ay1hV6OlegS.ico — 200 — 20.0 KiB — 15 ms — h3https://www.facebook.com/ajax/bz?__a=1&__ccg=EXCELLENT&__comet_req=15&__hs=20564.HYP%3Acomet_loggedout_pkg.2.1...0&__hsi=7631286059523266458&__req=1&__rev=1037799039&__s=t9zrzr%3Av22zuk%3A6v38gf&__spin_b=trunk&__spin_r=1037799039&__spin_t=1776797245&__user=0&dpr=2&jazoest=21978&lsd=AdR9Fj0VWLKEQd7EJw0Q33o6748&ph=C3www.facebook.com/ajax/bz?__a=1&__cc... https://www.facebook.com/ajax/bz?__a=1&__ccg=EXCELLENT&__comet_req=15&__hs=20564.HYP%3Acomet_loggedout_pkg.2.1...0&__hsi=7631286059523266458&__req=1&__rev=1037799039&__s=t9zrzr%3Av22zuk%3A6v38gf&__spin_b=trunk&__spin_r=1037799039&__spin_t=1776797245&__user=0&dpr=2&jazoest=21978&lsd=AdR9Fj0VWLKEQd7EJw0Q33o6748&ph=C3 — 200 — 221 B — 206 ms — h3https://www.instagram.com/accounts/xuserid/www.instagram.com/accounts/xuserid/ https://www.instagram.com/accounts/xuserid/ — 200 — 175 B — 226 ms — h3https://static.xx.fbcdn.net/rsrc.php/yB/r/83zWJdc6PJI.webpstatic.xx.fbcdn.net/rsrc.php/yB/r/8... https://static.xx.fbcdn.net/rsrc.php/yB/r/83zWJdc6PJI.webp — 200 — 173.6 KiB — 18 ms — h3https://www.facebook.com/ajax/bz?__a=1&__ccg=EXCELLENT&__comet_req=15&__hs=20564.HYP%3Acomet_loggedout_pkg.2.1...0&__hsi=7631286059523266458&__req=2&__rev=1037799039&__s=t9zrzr%3Av22zuk%3A6v38gf&__spin_b=trunk&__spin_r=1037799039&__spin_t=1776797245&__user=0&dpr=2&jazoest=21978&lsd=AdR9Fj0VWLKEQd7EJw0Q33o6748&ph=C3&qpl_active_flow_ids=175125627%2C516759801www.facebook.com/ajax/bz?__a=1&__cc... https://www.facebook.com/ajax/bz?__a=1&__ccg=EXCELLENT&__comet_req=15&__hs=20564.HYP%3Acomet_loggedout_pkg.2.1...0&__hsi=7631286059523266458&__req=2&__rev=1037799039&__s=t9zrzr%3Av22zuk%3A6v38gf&__spin_b=trunk&__spin_r=1037799039&__spin_t=1776797245&__user=0&dpr=2&jazoest=21978&lsd=AdR9Fj0VWLKEQd7EJw0Q33o6748&ph=C3&qpl_active_flow_ids=175125627%2C516759801 — 200 — 227 B — 215 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 848ms · 247KB · $11/mo
static.xx.fbcdn.net
Other
Costly
Execution 436ms
Transfer 73 KB
Unused 52%
Monthly Cost $6/mo
static.xx.fbcdn.net
Other
Optional
Execution 164ms
Transfer 101 KB
Unused 56%
Monthly Cost $2/mo
www.facebook.com
Other
Optional
Execution 155ms
Transfer 74 KB
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 93ms
Transfer 0 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • static.xx.fbcdn.net adds 436ms and costs ~$6/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

static.xx.fbcdn.net takes 436ms 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

52% of static.xx.fbcdn.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

56% of static.xx.fbcdn.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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