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Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
79
GRADE
C
FIX
5
REVIEW
4
PASS
10
INFO
3

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.
89
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
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.

911 ms

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

3.11 s

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

600 ms

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

0.002

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

2.85 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.

3.11 s

Page Load Progression

488 ms
976 ms
1.5 s
2.0 s
2.4 s
2.9 s
3.4 s
3.9 s
Checks
22
10 PASS 4 REVIEW 5 FIX
F
Page Weight Budget
Action
2.7 MB transferred, 111 requests
FIX
2.7 MB transferred, 111 requests
Warning::
Page weighs 7.2 MB (2.7 MB transferred)
Warning::
JavaScript is 1.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.8 MB
Info::
Fonts are 255 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 255 KB
Warning::
111 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.56 g CO2 per page load
2.7 MB / 2.4 MB budget
2.7 MB transferred
111 requests
0.56 g CO2 per page load
JavaScript 1.8 MiB 68%
Other 459.7 KiB 17%
Fonts 254.6 KiB 9%
HTML 124.7 KiB 5%
Other 21.9 KiB 1%
Other 8.0 KiB 0%
Images 756 B 0%
CSS 665 B 0%
Other 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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

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 (2.7 MiB of 2.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2363ms total JS execution
FIX
2363ms total JS execution
Warning::
https://abs.twimg.com/responsive-web/client-web/on...: 968ms CPU time
Warning::
https://abs.twimg.com/responsive-web/client-web/ma...: 694ms CPU time
Info::
Unattributable: 209ms CPU time
Info::
https://x.com/: 135ms CPU time
Info::
https://abs.twimg.com/responsive-web/client-web/sh...: 124ms CPU time
Warning::
Third-party scripts: 2154ms (91% of total)

Main Thread Breakdown

Script Evaluation 71% Other 12% Script Parsing & Compilation 10%
ScriptTotalScriptingParse/CompileParty
https://abs.twimg.com/responsive-web/client-web/ondemand.castle.1ff15ffa.js968ms888ms21ms3rd
https://abs.twimg.com/responsive-web/client-web/main.4b8dc5fa.js694ms606ms38ms3rd
Unattributable209ms9ms0ms1st
https://x.com/135ms14ms17ms3rd
https://abs.twimg.com/responsive-web/client-web/shared~loader.Dock~bundle.AudioSpaceDetail~bundle.AudioSpaceDiscovery~bundle.AudioSpacebarScreen~bundle.Birdw.9e84b01a.js124ms111ms3ms3rd
https://abs.twimg.com/responsive-web/client-web/ondemand.s.15e81dda.js102ms84ms1ms3rd
https://abs.twimg.com/responsive-web/client-web/vendor.6f0bbb5a.js81ms15ms21ms3rd
https://abs.twimg.com/responsive-web/client-web/icons.0.b3882cba.js51ms49ms1ms3rd
F
JS Bundles
Action
86 scripts, 1.4 MB unused
FIX
86 scripts, 1.4 MB unused
Warning::
https://abs.twimg.com/responsive-web/client-web/ma...: 144 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://abs.twimg.com/responsive-web/client-web/sh...: 122 KB unused (92%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://abs.twimg.com/responsive-web/client-web/ve...: 86 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://abs.twimg.com/responsive-web/client-web/on...: 72 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://abs.twimg.com/responsive-web/client-web/mo...: 65 KB unused (92%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.4 MB
1443 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://abs.twimg.com/responsive-web/client-web/main.4b8dc5fa.js283 KB144 KB (51%)✓3rd
https://abs.twimg.com/responsive-web/client-web/shared~loader.Dock~bundle.ConnectTab~ondemand.XChat~bundle.DockPeek~bundle.LiveEvent~ondemand.ChatDrawer~load.4dc5a45a.js132 KB122 KB (92%)✓3rd
https://abs.twimg.com/responsive-web/client-web/vendor.6f0bbb5a.js188 KB86 KB (46%)✓3rd
https://abs.twimg.com/responsive-web/client-web/ondemand.castle.1ff15ffa.js212 KB72 KB (34%)✓3rd
https://abs.twimg.com/responsive-web/client-web/modules.common.4722c04a.js0 KB65 KB (92%)✓3rd
https://abs.twimg.com/responsive-web/client-web/modules.common.4722c04a.js21 KB65 KB (92%)✓3rd
https://accounts.google.com/gsi/client97 KB65 KB (68%)✓3rd
https://abs.twimg.com/responsive-web/client-web/shared~loader.Dock~bundle.AudioSpaceDetail~bundle.AudioSpaceDiscovery~bundle.AudioSpacebarScreen~bundle.Birdw.9e84b01a.js27 KB64 KB (66%)✓3rd
https://abs.twimg.com/responsive-web/client-web/shared~loader.Dock~bundle.AudioSpaceDetail~bundle.AudioSpaceDiscovery~bundle.AudioSpacebarScreen~bundle.Birdw.9e84b01a.js0 KB64 KB (66%)✓3rd
https://abs.twimg.com/responsive-web/client-web/shared~bundle.LoggedInMain~ondemand.HoverCard~loader.AudioDock~loader.Dock~loader.Typeahead~bundle.GrokDrawer.21bc47da.js25 KB59 KB (79%)✓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
111 resources · 2.7 MB · 1.4 MB savings available
FIX
111 resources · 2.7 MB · 1.4 MB savings available
Warning::
Page weight 2.7 MB exceeds 1 MB target by 1.7 MB
Got: 2.7 MB Expected: ≤ 1 MB
Info::
~1.4 MB of savings available
Warning::
110 third-party resources (100% of weight)
Info::
2 resources over 200KB
111 resources · 2.7 MiB · 110 third-party 1.7 MiB over 1MB target
JavaScript 84% · 2.3 MiB
Font 9% · 254.6 KiB
Document 5% · 133.0 KiB
Other 1% · 30.8 KiB
Image 0% · 5.3 KiB
CSS 0% · 665 B

~1.4 MiB of savings available

Remove unused JavaScript: 1.4 MiB
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
B
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
REVIEW
Main response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
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.
B
HTTP Caching
no-cache, private, must-revalidate, pre-check=0, post-check=0
REVIEW
no-cache, private, must-revalidate, pre-check=0, post-check=0
Info::
Cache-Control header is set
Got: no-cache, private, must-revalidate, pre-check=0, post-check=0
Info::
Last-Modified header present
Cache-Control

no-cache, private, must-revalidate, pre-check=0, post-check=0

DirectiveValueMeaning
no-cache—Cache but always revalidate first
private—Only browser cache, not CDN/proxy
must-revalidate—Must recheck with server after expiry
pre-check0
post-check0
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
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 1 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
5 fonts (255 KB)
PASS
5 fonts (255 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

255 KB total

Render-blocking

0

of 5

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 911 ms LCP 3.1 shttps://abs.twimg.com/responsive-web/client-web/Chirp-Regular.80fda27a.woff2Chirp-Regular.80fda27a.... https://abs.twimg.com/responsive-web/client-web/Chirp-Regular.80fda27a.woff2 — 44.0 KiB — 38 ms — font-display: swaphttps://abs.twimg.com/responsive-web/client-web/Chirp-Bold.ebb56aba.woff2Chirp-Bold.ebb56aba.woff2 https://abs.twimg.com/responsive-web/client-web/Chirp-Bold.ebb56aba.woff2 — 44.4 KiB — 44 ms — font-display: swaphttps://abs.twimg.com/responsive-web/client-web/Chirp-Medium.f8e2739a.woff2Chirp-Medium.f8e2739a.w... https://abs.twimg.com/responsive-web/client-web/Chirp-Medium.f8e2739a.woff2 — 43.9 KiB — 37 ms — font-display: swaphttps://abs.twimg.com/responsive-web/client-web/Geist-var.2587a0ca.woff2Geist-var.2587a0ca.woff2 https://abs.twimg.com/responsive-web/client-web/Geist-var.2587a0ca.woff2 — 68.4 KiB — 8 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesans/v62/4UaRrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iq2vgCIhM907w.woff24UaRrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v62/4UaRrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iq2vgCIhM907w.woff2 — 53.9 KiB — 22 ms — font-display: swap
Chirp-Regular.80fda27a.... woff2 swap
Size 44 KB
Load time 38 ms
Start 490 ms
Risk FOUT — text flashes from fallback to web font
Chirp-Bold.ebb56aba.woff2 woff2 swap
Size 44 KB
Load time 44 ms
Start 491 ms
Risk FOUT — text flashes from fallback to web font
Chirp-Medium.f8e2739a.w... woff2 swap
Size 44 KB
Load time 37 ms
Start 491 ms
Risk FOUT — text flashes from fallback to web font
Geist-var.2587a0ca.woff2 woff2 swap
Size 68 KB
Load time 8 ms
Start 2.2 s
Risk FOUT — text flashes from fallback to web font
4UaRrENHsxJlGDuGo1OIlJf... woff2 swap
Size 54 KB
Load time 22 ms
Start 3.8 s
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
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+
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-cache -- safe revalidate-on-request policy
PASS
Main HTML uses no-cache -- safe revalidate-on-request policy
Info::
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: no-cache, private, must-revalidate, pre-check=0, post-check=0
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept
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::
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
111 requests over 5390ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 911 ms LCP 3.1 shttps://twitter.com// https://twitter.com/ — 301 — 8.4 KiB — 230 ms — h2https://x.com/x.com/ https://x.com/ — 200 — 69.7 KiB — 632 ms — h2https://abs.twimg.com/responsive-web/client-web/Chirp-Regular.80fda27a.woff2abs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/Chirp-Regular.80fda27a.woff2 — 200 — 44.0 KiB — 38 ms — h2https://abs.twimg.com/responsive-web/client-web/Chirp-Bold.ebb56aba.woff2abs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/Chirp-Bold.ebb56aba.woff2 — 200 — 44.4 KiB — 44 ms — h2https://abs.twimg.com/responsive-web/client-web/Chirp-Medium.f8e2739a.woff2abs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/Chirp-Medium.f8e2739a.woff2 — 200 — 43.9 KiB — 37 ms — h2https://abs.twimg.com/responsive-web/client-web/vendor.6f0bbb5a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/vendor.6f0bbb5a.js — 200 — 187.7 KiB — 74 ms — h2https://abs.twimg.com/responsive-web/client-web/i18n/en.8f58303a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/i18n/en.8f58303a.js — 200 — 193.4 KiB — 85 ms — h2https://abs.twimg.com/responsive-web/client-web/main.4b8dc5fa.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/main.4b8dc5fa.js — 200 — 282.8 KiB — 93 ms — h2https://x.com/manifest.jsonx.com/manifest.json https://x.com/manifest.json — 200 — 8.0 KiB — 222 ms — h2https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutShell.4453c78a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutShell.4453c78a.js — 200 — 35.4 KiB — 6 ms — h2https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutRoutes.595ad6da.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutRoutes.595ad6da.js — 200 — 85.4 KiB — 9 ms — h2https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutHome.ca313cea.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutHome.ca313cea.js — 200 — 25.1 KiB — 4 ms — h2https://abs.twimg.com/emoji/v2/svg/26a0.svgabs.twimg.com/emoji/v2/svg/26a0.svg https://abs.twimg.com/emoji/v2/svg/26a0.svg — 200 — 756 B — 8 ms — h2https://x.com/cdn-cgi/challenge-platform/scripts/jsd/api.js?onload=jsdOnloadx.com/cdn-cgi/challenge-platform/sc... https://x.com/cdn-cgi/challenge-platform/scripts/jsd/api.js?onload=jsdOnload — 302 — 418 B — 360 ms — h2https://abs.twimg.com/responsive-web/client-web/shared~bundle.LoggedInApiFilters~bundle.PaymentShared~ondemand.PaymentsWebCore.e04e17ba.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/shared~bundle.LoggedInApiFilters~bundle.PaymentShared~ondemand.PaymentsWebCore.e04e17ba.js — 200 — 4.8 KiB — 6 ms — h2https://abs.twimg.com/responsive-web/client-web/bundle.LoggedInApiFilters.41d9c97a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/bundle.LoggedInApiFilters.41d9c97a.js — 200 — 18.8 KiB — 9 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.8.0ed675ba.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.8.0ed675ba.js — 200 — 10.4 KiB — 6 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.9.3a5fc8fa.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.9.3a5fc8fa.js — 200 — 11.0 KiB — 62 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.1.07e0919a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.1.07e0919a.js — 200 — 8.4 KiB — 61 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.22.9d36e6aa.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.22.9d36e6aa.js — 200 — 10.1 KiB — 61 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.15.99d62cda.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.15.99d62cda.js — 200 — 8.5 KiB — 57 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.7.8b74145a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.7.8b74145a.js — 200 — 11.6 KiB — 81 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.18.cc05e03a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.18.cc05e03a.js — 200 — 9.2 KiB — 58 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.5.dc7cb16a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.5.dc7cb16a.js — 200 — 7.9 KiB — 59 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.24.f9bb4c6a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.24.f9bb4c6a.js — 200 — 7.5 KiB — 62 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.13.f610e8ea.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.13.f610e8ea.js — 200 — 7.9 KiB — 64 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.25.4ef9445a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.25.4ef9445a.js — 200 — 8.6 KiB — 68 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.14.3a34db2a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.14.3a34db2a.js — 200 — 7.5 KiB — 76 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.4.35f0b98a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.4.35f0b98a.js — 200 — 8.3 KiB — 77 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.6.2fa72c6a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.6.2fa72c6a.js — 200 — 8.4 KiB — 77 ms — h2
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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
91% of JavaScript execution is third-party
First-party Third-party 2154ms · 768KB · €23/mo
abs.twimg.com
Other
Costly
Execution 968ms
Transfer 212 KB
Unused 34%
Monthly Cost €11/mo
abs.twimg.com
Other
Costly
Execution 694ms
Transfer 283 KB
Unused 51%
Monthly Cost €8/mo
x.com
Other
Optional
Execution 135ms
Transfer 70 KB
Monthly Cost €1/mo
abs.twimg.com
Other
Optional
Execution 124ms
Transfer 0 KB
Unused 66%
Monthly Cost €1/mo
abs.twimg.com
Other
Optional
Execution 102ms
Transfer 9 KB
Monthly Cost €1/mo
abs.twimg.com
Other
Optional
Execution 81ms
Transfer 188 KB
Unused 46%
Monthly Cost €1/mo
abs.twimg.com
Other
Optional
Execution 51ms
Transfer 7 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • abs.twimg.com adds 968ms and costs ~€11/month
  • abs.twimg.com adds 694ms and costs ~€8/month

91% 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

abs.twimg.com takes 968ms 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

abs.twimg.com takes 694ms 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

51% of abs.twimg.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

66% of abs.twimg.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

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 (2026-06-11 — 2026-07-08)

LCP (p75)

4183 ms

45% good

INP (p75)

334 ms

51% good

CLS (p75)

0.070

92% good

FCP (p75)

1087 ms

TTFB (p75)

768 ms

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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