Performance
· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
768 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
937 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
258 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.
1.43 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.
2.58 s
Page Load Progression
DPage Weight BudgetAction2.2 MB transferred, 466 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction99% third-party, 0 ms blockingFIX
DJS Execution CostAction2228ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 731ms | 143ms | 0ms | 1st |
| https://abs.twimg.com/x-web/x-web/assets/sentry-filter-BRSlKfNZ.js | 574ms | 436ms | 2ms | 3rd |
| https://abs.twimg.com/x-web/x-web/assets/castle.umd-CqfXAxRg.js | 396ms | 381ms | 1ms | 3rd |
| https://x.com/ | 391ms | 181ms | 1ms | 1st |
| https://abs.twimg.com/x-web/x-web/assets/xhr-DJsfpfui.js | 84ms | 74ms | 0ms | 3rd |
| https://abs.twimg.com/x-web/x-web/assets/install-sentry-tracing-Bl6XxJ8o.js | 51ms | 50ms | 0ms | 3rd |
FJS BundlesAction442 scripts, 539 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://abs.twimg.com/x-web/x-web/assets/castle.umd-CqfXAxRg.js | 217 KB | 129 KB (59%) | ✓ | 3rd |
| https://abs.twimg.com/x-web/x-web/assets/src-DPzyIjFy.js | 178 KB | 119 KB (67%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 97 KB | 69 KB (72%) | ✓ | 3rd |
| https://abs.twimg.com/x-web/x-web/assets/sentry-filter-BRSlKfNZ.js | 132 KB | 52 KB (39%) | ✓ | 3rd |
| https://abs.twimg.com/x-web/x-web/assets/chunk-BO2N2NFS-CqKiw6ka.js | 119 KB | 47 KB (74%) | ✓ | 3rd |
| https://abs.twimg.com/x-web/x-web/assets/relay-runtime-DyaKXP7l.js | 49 KB | 38 KB (79%) | ✓ | 3rd |
| https://abs.twimg.com/x-web/x-web/assets/proxy-D4h0P7V4.js | 39 KB | 34 KB (89%) | ✓ | 3rd |
| https://abs.twimg.com/x-web/x-web/assets/tweet-results-BHXEh2xg.js | 51 KB | 30 KB (60%) | ✓ | 3rd |
| https://abs.twimg.com/x-web/x-web/assets/icon-topic-travel-DevaWD5w.js | 22 KB | 21 KB (98%) | ✓ | 3rd |
| https://abs.twimg.com/x-web/x-web/assets/use-swr-mgpzvfmo-rnPwBYvO.js | 5 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction466 resources · 2.2 MB · 539 KB savings availableFIX
~538.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 466 resources | 2.2 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-cache, no-store, max-age=0
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
| max-age | 0 | Cache for 0 seconds |
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BCompression AlgorithmMain response uses gzip; brotli would be ~20% smallerREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization3 images, 0 KB saveablePASS
A+Font Loading4 fonts (138 KB)PASS
Web fonts
4
138 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall466 requests over 4994msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
abs.twimg.com abs.twimg.com | Other | 574ms | 132 KB | 39% | €6/mo | Costly |
abs.twimg.com abs.twimg.com | Other | 396ms | 217 KB | 59% | €4/mo | Costly |
abs.twimg.com abs.twimg.com | Other | 84ms | 6 KB | — | €1/mo | Optional |
abs.twimg.com abs.twimg.com | Other | 51ms | 18 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- abs.twimg.com adds 574ms and costs ~€6/month
- abs.twimg.com adds 396ms and costs ~€4/month
50% of JavaScript execution time comes from third-party scripts.
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾ ▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
abs.twimg.com takes 574ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
abs.twimg.com takes 396ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
59% of abs.twimg.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-07-12 — 2026-08-08)
LCP (p75)
6742 ms
22% good
INP (p75)
391 ms
42% good
CLS (p75)
0.090
83% good
FCP (p75)
1092 ms
TTFB (p75)
755 ms