Performance
· 17 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.
7.40 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.89 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
3.25 s
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.
8.73 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.
17.47 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 sDPage Weight BudgetAction2.5 MB transferred, 178 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 ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction11513ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://assets.twitch.tv/assets/56004-66d68a0eb8ef5ca75bfc.js | 5006ms | 4268ms | 87ms | 3rd |
| https://passport.twitch.tv/149e9513-01fa-4fb0-aad4-566afd725d1b/2d206a39-8ed7-437e-a3be-862e0f06eea3/ips.js?ga__15_abel=03zhGLEKLkPdbsLDvaQzBJ7iA7G4BIMvWIBeUbV8uEbhp1kkmiMwZslPp9wbfw8Wq4XWlwSwnmYyPtuXiS4xS2RN78aLKSXukviyUUxxqwPTT5eJY4T4ZhskWBIcfiLgIHIwCBnyl3ltaGpWJQUBVt5b0ZDPEE99MofkbE1UUfIO2DuFAI&x-kpsdk-v=j-1.2.308&x-kpsdk-im=AAKfv-LUKnC2alWYr37obbZKo_nrFIgEg-D8bCcxZCu0EiZnuO-VkOQNCE6kzwFagJvM39f1pxTJSQFTz6dQ4z2s9n0 | 2080ms | 1922ms | 38ms | 3rd |
| https://gql.twitch.tv/149e9513-01fa-4fb0-aad4-566afd725d1b/2d206a39-8ed7-437e-a3be-862e0f06eea3/ips.js?KP_UIDZ_1=03nlYN7yCKDw3vhIHewVsXJ89pI136mug68j3cp8czUzcIM9HrVEVH3x8GPrYDNdeYHGwt16bDEmuTgI5L9W66c8Lk8DvHYp0Z02M7mGxzXKhe9zH65hAgvgMI7hadPBG4L1oboQR7BmQOGuW7kj0frKteDZNjXqVKZf2lSgE5InqSO3C4&x-kpsdk-v=j-1.2.308&x-kpsdk-im=AAK0U1SbE_b2N32kq3hGCoVlw6HMYxUCyaaOPAG9P4qYtOi-KF7Lgg9hasN9Oanrx4jB1aZgV8EOVpnoLc0ZbgWNXVQ | 1567ms | 1449ms | 30ms | 3rd |
| Unattributable | 981ms | 224ms | 1ms | 3rd |
| https://k.twitchcdn.net/149e9513-01fa-4fb0-aad4-566afd725d1b/2d206a39-8ed7-437e-a3be-862e0f06eea3/p.js | 620ms | 600ms | 10ms | 3rd |
| https://assets.twitch.tv/assets/mweb-main-32d4a565e220a3fecec8.js | 575ms | 573ms | 2ms | 3rd |
| https://m.twitch.tv/?desktop-redirect=true | 480ms | 47ms | 20ms | 3rd |
| https://assets.twitch.tv/assets/61278-4da8de161f510eb7019d.js | 114ms | 26ms | 2ms | 3rd |
| https://assets.twitch.tv/assets/72001-074b1cab8ba14fbcbf6d.js | 90ms | 52ms | 38ms | 3rd |
DPage Weight InventoryAction178 resources · 2.5 MB · 137 KB savings availableFIX
~137.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 178 resources | 2.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization91 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BJS Bundles51 scripts, 137 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://assets.twitch.tv/assets/56004-66d68a0eb8ef5ca75bfc.js | 241 KB | 80 KB (33%) | ✓ | 3rd |
| https://assets.twitch.tv/assets/flags-ff62b41fa1a6ed5b8694.js | 60 KB | 29 KB (66%) | ✓ | 3rd |
| https://assets.twitch.tv/assets/72001-074b1cab8ba14fbcbf6d.js | 94 KB | 28 KB (30%) | ✓ | 3rd |
| https://assets.twitch.tv/config/settings.a8eaa962ef1237224bf3f7dc71ac64b0.js | 21 KB | — | ✓ | 3rd |
| https://assets.twitch.tv/eppo/api/flag-config/v1/config?sdkName=js-sdk-client&sdkVersion=3.1.2&apiKey=3mv-BKCSZJDyZrwfqK86har6u13NgxRh.ZWg9bTRsZHJnLmUuZXBwby5jbG91ZCZjcz1tNGxkcmc&callback=__setEppoConfig | 18 KB | — | ✓ | 3rd |
| https://assets.twitch.tv/assets/polyfills-94011fd2288c5f27d2d0.js | 18 KB | — | ✓ | 3rd |
| https://assets.twitch.tv/assets/49084-26d4d7974931a87b31fe.js | 10 KB | — | ✓ | 3rd |
| https://assets.twitch.tv/assets/75451-eb34b4e976d4577f47ea.js | 1 KB | — | ✓ | 3rd |
| https://assets.twitch.tv/assets/71259-3bcd239c1a3eccc7843e.js | 8 KB | — | ✓ | 3rd |
| https://assets.twitch.tv/assets/79004-37889c4d802094cfb1f6.js | 7 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (120 KB)PASS
Web fonts
4
120 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 Hints11 hints, 0 missing preconnectsPASS
Current Resource Hints
11 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall178 requests over 4997msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
assets.twitch.tv assets.twitch.tv | Other | 5006ms | 241 KB | 33% | $66/mo | Costly |
passport.twitch.tv passport.twitch.tv | Other | 2080ms | 253 KB | — | $28/mo | Costly |
gql.twitch.tv gql.twitch.tv | Other | 1567ms | 245 KB | — | $21/mo | Costly |
Unattributable Unattributable | Other | 981ms | 0 KB | — | $13/mo | Costly |
k.twitchcdn.net k.twitchcdn.net | Other | 620ms | 58 KB | — | $8/mo | Costly |
assets.twitch.tv assets.twitch.tv | Other | 575ms | 10 KB | — | $8/mo | Costly |
m.twitch.tv m.twitch.tv | Other | 480ms | 68 KB | — | $6/mo | Costly |
assets.twitch.tv assets.twitch.tv | Other | 114ms | 7 KB | — | $2/mo | Optional |
assets.twitch.tv assets.twitch.tv | Other | 90ms | 94 KB | 30% | $1/mo | Optional |
These scripts may cost more than they're worth
- assets.twitch.tv adds 5006ms and costs ~$66/month
- passport.twitch.tv adds 2080ms and costs ~$28/month
- gql.twitch.tv adds 1567ms and costs ~$21/month
- Unattributable adds 981ms and costs ~$13/month
- k.twitchcdn.net adds 620ms and costs ~$8/month
- assets.twitch.tv adds 575ms and costs ~$8/month
- m.twitch.tv adds 480ms and costs ~$6/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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
assets.twitch.tv takes 5006ms 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
passport.twitch.tv takes 2080ms 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
gql.twitch.tv takes 1567ms 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
Unattributable takes 981ms 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
k.twitchcdn.net takes 620ms 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
assets.twitch.tv takes 575ms 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
m.twitch.tv takes 480ms 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