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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
5
REVIEW
1
PASS
9
INFO
2

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

Mobile Desktop
52
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.
96
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.

9.51 s

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

13.31 s

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

238 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.

9.51 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.

13.34 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
17
9 PASS 1 REVIEW 5 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 (1.7 MiB of 1.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5795ms total JS execution
FIX
5795ms total JS execution
Warning::
https://abs.twimg.com/responsive-web/client-web/ma...: 3049ms CPU time
Warning::
https://abs.twimg.com/responsive-web/client-web/ve...: 1452ms CPU time
Warning::
Unattributable: 639ms CPU time
Info::
https://x.com/: 245ms CPU time
Info::
https://abs.twimg.com/responsive-web/client-web/sh...: 190ms CPU time
Warning::
Third-party scripts: 5795ms (100% of total)

Main Thread Breakdown

Script Evaluation 74% Other 11% Script Parsing & Compilation 9%
ScriptTotalScriptingParse/CompileParty
https://abs.twimg.com/responsive-web/client-web/main.52d81e4a.js3049ms2801ms94ms3rd
https://abs.twimg.com/responsive-web/client-web/vendor.7ef16aaa.js1452ms1186ms127ms3rd
Unattributable639ms32ms0ms3rd
https://x.com/245ms37ms105ms3rd
https://abs.twimg.com/responsive-web/client-web/shared~bundle.Routes~bundle.LoggedOutShell~ondemand.HoverCard~bundle.Delegate~bundle.TwitterBlue~ondemand.Com.39f4feca.js190ms170ms17ms3rd
https://abs.twimg.com/responsive-web/client-web/ondemand.s.a759306a.js162ms156ms1ms3rd
https://abs.twimg.com/responsive-web/client-web/modules.audio.184d9faa.js58ms36ms21ms3rd
F
JS Bundles
Action
50 scripts, 502 KB unused
FIX
50 scripts, 502 KB unused
Warning::
https://abs.twimg.com/responsive-web/client-web/ma...: 148 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://abs.twimg.com/responsive-web/client-web/ve...: 103 KB unused (30%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://abs.twimg.com/responsive-web/client-web/mo...: 75 KB unused (99%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://accounts.google.com/gsi/client: 69 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://abs.twimg.com/responsive-web/client-web/i1...: 42 KB unused (23%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 502 KB
502 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://abs.twimg.com/responsive-web/client-web/main.52d81e4a.js287 KB148 KB (52%)✓3rd
https://abs.twimg.com/responsive-web/client-web/vendor.7ef16aaa.js346 KB103 KB (30%)✓3rd
https://abs.twimg.com/responsive-web/client-web/modules.audio.184d9faa.js76 KB75 KB (99%)✓3rd
https://accounts.google.com/gsi/client96 KB69 KB (72%)✓3rd
https://abs.twimg.com/responsive-web/client-web/i18n/en.f19ad19a.js180 KB42 KB (23%)✓3rd
https://abs.twimg.com/responsive-web/client-web/loader.AppModules.219d882a.js33 KB24 KB (73%)✓3rd
https://abs.twimg.com/responsive-web/client-web/modules.common.469fbc7a.js21 KB21 KB (98%)✓3rd
https://abs.twimg.com/responsive-web/client-web/shared~bundle.AudioSpaceDetail~bundle.AudioSpaceDiscovery~bundle.AudioSpacebarScreen~bundle.Birdwatch~bundle..2150637a.js23 KB20 KB (90%)✓3rd
https://abs.twimg.com/responsive-web/client-web/icons.6.6693286a.js6 KB—✓3rd
https://abs.twimg.com/responsive-web/client-web/icons.28.6b0fceaa.js7 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
70 resources · 1.7 MB · 502 KB savings available
FIX
70 resources · 1.7 MB · 502 KB savings available
Warning::
Page weight 695 KB over 1MB target
Got: 1.7 MB Expected: ≤ 1 MB
Info::
~502 KB of savings available
Warning::
69 third-party resources (100% of weight)
Info::
2 resources over 200KB
70 resources · 1.7 MiB · 69 third-party 695.1 KiB over 1MB target
JavaScript 84% · 1.4 MiB
Font 10% · 171.2 KiB
Document 4% · 73.4 KiB
Other 1% · 17.9 KiB
Image 0% · 5.6 KiB
CSS 0% · 642 B

~501.8 KiB of savings available

Remove unused JavaScript: 501.8 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: no-cache, no-store, must-revalidate, pre-check=0, post-check=0
Info::
Last-Modified header present
Cache-Control

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

DirectiveValueMeaning
no-cache—Cache but always revalidate first
no-store—Never cache this response
must-revalidate—Must recheck with server after expiry
pre-check0
post-check0
C
Page Weight Budget
Action
1.7 MB transferred, 70 requests
REVIEW
1.7 MB transferred, 70 requests
Info::
Page weighs 5.3 MB (1.7 MB transferred)
Warning::
JavaScript is 1.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.4 MB
Info::
70 HTTP requests
Info::
Estimated 0.35 g CO2 per page load
1.7 MB / 2.4 MB budget
1.7 MB transferred
70 requests
0.35 g CO2 per page load
JavaScript 1.4 MiB 84%
Fonts 171.2 KiB 10%
HTML 65.5 KiB 4%
Other 12.7 KiB 1%
Other 10.0 KiB 1%
Other 7.9 KiB 0%
Images 753 B 0%
CSS 642 B 0%
Other 0 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

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
4 fonts (171 KB)
PASS
4 fonts (171 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

171 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 9.5 s LCP 13.3 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 — 43.9 KiB — 153 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 — 44.2 KiB — 153 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 — 44.0 KiB — 154 ms — font-display: swaphttps://abs.twimg.com/fonts/v1/chirp-extended-heavy-web.woff2chirp-extended-heavy-we... https://abs.twimg.com/fonts/v1/chirp-extended-heavy-web.woff2 — 39.1 KiB — 32 ms — font-display: swap
Chirp-Regular.80fda27a.... woff2 swap
Size 44 KB
Load time 153 ms
Start 385 ms
Risk FOUT — text flashes from fallback to web font
Chirp-Bold.ebb56aba.woff2 woff2 swap
Size 44 KB
Load time 153 ms
Start 386 ms
Risk FOUT — text flashes from fallback to web font
Chirp-Medium.f8e2739a.w... woff2 swap
Size 44 KB
Load time 154 ms
Start 386 ms
Risk FOUT — text flashes from fallback to web font
chirp-extended-heavy-we... woff2 swap
Size 39 KB
Load time 32 ms
Start 1.9 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
21 hints, 0 missing preconnects
PASS
21 hints, 0 missing preconnects
Info::
Page uses 21 resource hint(s)

Current Resource Hints

preconnect
6
preload
9
dns-prefetch
6
prefetch
—

21 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
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
70 requests over 2228ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 9.5 s LCP 13.3 shttps://twitter.com// https://twitter.com/ — 301 — 7.9 KiB — 179 ms — h2https://x.com/x.com/ https://x.com/ — 200 — 65.5 KiB — 351 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 — 43.9 KiB — 153 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 — 44.2 KiB — 153 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 — 44.0 KiB — 154 ms — h2https://abs.twimg.com/responsive-web/client-web/vendor.7ef16aaa.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/vendor.7ef16aaa.js — 200 — 346.3 KiB — 172 ms — h2https://abs.twimg.com/responsive-web/client-web/i18n/en.f19ad19a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/i18n/en.f19ad19a.js — 200 — 180.3 KiB — 174 ms — h2https://abs.twimg.com/responsive-web/client-web/main.52d81e4a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/main.52d81e4a.js — 200 — 287.1 KiB — 182 ms — h2https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutShell.d6e583ca.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutShell.d6e583ca.js — 200 — 20.1 KiB — 178 ms — h2https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutRoutes.5381a15a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutRoutes.5381a15a.js — 200 — 6.9 KiB — 178 ms — h2https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutHome.888e533a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutHome.888e533a.js — 200 — 7.1 KiB — 177 ms — h2https://x.com/manifest.jsonx.com/manifest.json https://x.com/manifest.json — 200 — 7.9 KiB — 147 ms — h2https://abs-0.twimg.com/emoji/v2/svg/26a0.svgabs-0.twimg.com/emoji/v2/svg/26a0.s... https://abs-0.twimg.com/emoji/v2/svg/26a0.svg — 200 — 753 B — 76 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.8.fa9011ea.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.8.fa9011ea.js — 200 — 9.1 KiB — 44 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.15.b08c9c9a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.15.b08c9c9a.js — 200 — 6.6 KiB — 31 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.9.d0d9163a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.9.d0d9163a.js — 200 — 8.6 KiB — 39 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.22.a1035d5a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.22.a1035d5a.js — 200 — 8.6 KiB — 34 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.18.ead3a9da.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.18.ead3a9da.js — 200 — 7.3 KiB — 50 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.7.cac73cea.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.7.cac73cea.js — 200 — 8.3 KiB — 31 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.1.d09dd5aa.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.1.d09dd5aa.js — 200 — 5.7 KiB — 56 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.5.214c465a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.5.214c465a.js — 200 — 6.7 KiB — 63 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.24.9ebc84fa.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.24.9ebc84fa.js — 200 — 6.0 KiB — 68 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.4.a032591a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.4.a032591a.js — 200 — 7.1 KiB — 51 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.14.a210b5fa.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.14.a210b5fa.js — 200 — 6.0 KiB — 53 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.13.027fab8a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.13.027fab8a.js — 200 — 5.8 KiB — 64 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.25.b2e7018a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.25.b2e7018a.js — 200 — 5.7 KiB — 54 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.19.e81232ba.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.19.e81232ba.js — 200 — 7.4 KiB — 57 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.6.6693286a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.6.6693286a.js — 200 — 6.5 KiB — 75 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.3.45196c7a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.3.45196c7a.js — 200 — 7.1 KiB — 104 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.21.7be58aca.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.21.7be58aca.js — 200 — 5.4 KiB — 71 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 9.5 s LCP 13.3 shttps://twitter.com// https://twitter.com/ — 301 — 7.9 KiB — 179 ms — h2https://x.com/x.com/ https://x.com/ — 200 — 65.5 KiB — 351 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 — 43.9 KiB — 153 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 — 44.2 KiB — 153 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 — 44.0 KiB — 154 ms — h2https://abs.twimg.com/responsive-web/client-web/vendor.7ef16aaa.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/vendor.7ef16aaa.js — 200 — 346.3 KiB — 172 ms — h2https://abs.twimg.com/responsive-web/client-web/i18n/en.f19ad19a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/i18n/en.f19ad19a.js — 200 — 180.3 KiB — 174 ms — h2https://abs.twimg.com/responsive-web/client-web/main.52d81e4a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/main.52d81e4a.js — 200 — 287.1 KiB — 182 ms — h2https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutShell.d6e583ca.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutShell.d6e583ca.js — 200 — 20.1 KiB — 178 ms — h2https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutRoutes.5381a15a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutRoutes.5381a15a.js — 200 — 6.9 KiB — 178 ms — h2https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutHome.888e533a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/bundle.LoggedOutHome.888e533a.js — 200 — 7.1 KiB — 177 ms — h2https://x.com/manifest.jsonx.com/manifest.json https://x.com/manifest.json — 200 — 7.9 KiB — 147 ms — h2https://abs-0.twimg.com/emoji/v2/svg/26a0.svgabs-0.twimg.com/emoji/v2/svg/26a0.s... https://abs-0.twimg.com/emoji/v2/svg/26a0.svg — 200 — 753 B — 76 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.8.fa9011ea.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.8.fa9011ea.js — 200 — 9.1 KiB — 44 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.15.b08c9c9a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.15.b08c9c9a.js — 200 — 6.6 KiB — 31 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.9.d0d9163a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.9.d0d9163a.js — 200 — 8.6 KiB — 39 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.22.a1035d5a.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.22.a1035d5a.js — 200 — 8.6 KiB — 34 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.18.ead3a9da.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.18.ead3a9da.js — 200 — 7.3 KiB — 50 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.7.cac73cea.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.7.cac73cea.js — 200 — 8.3 KiB — 31 ms — h2https://abs.twimg.com/responsive-web/client-web/icons.1.d09dd5aa.jsabs.twimg.com/responsive-web/client... https://abs.twimg.com/responsive-web/client-web/icons.1.d09dd5aa.js — 200 — 5.7 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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
100% of JavaScript execution is third-party
First-party Third-party 5795ms · 827KB · €63/mo
abs.twimg.com
Other
Costly
Execution 3049ms
Transfer 287 KB
Unused 52%
Monthly Cost €33/mo
abs.twimg.com
Other
Costly
Execution 1452ms
Transfer 346 KB
Unused 30%
Monthly Cost €16/mo
Unattributable
Other
Costly
Execution 639ms
Transfer 0 KB
Monthly Cost €7/mo
x.com
Other
Costly
Execution 245ms
Transfer 65 KB
Monthly Cost €3/mo
abs.twimg.com
Other
Optional
Execution 190ms
Transfer 41 KB
Monthly Cost €2/mo
abs.twimg.com
Other
Optional
Execution 162ms
Transfer 10 KB
Monthly Cost €2/mo
abs.twimg.com
Other
Optional
Execution 58ms
Transfer 76 KB
Unused 99%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • abs.twimg.com adds 3049ms and costs ~€33/month
  • abs.twimg.com adds 1452ms and costs ~€16/month
  • Unattributable adds 639ms and costs ~€7/month
  • x.com adds 245ms and costs ~€3/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

abs.twimg.com takes 3049ms 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 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

abs.twimg.com takes 1452ms 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

Unattributable takes 639ms 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

x.com takes 245ms 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

99% 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

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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