Performance
· 15 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.
1.39 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.54 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
19 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.003
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.39 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.
3.72 s
Page Load Progression
FPage Weight BudgetAction4.8 MB transferred, 51 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction51 resources · 4.8 MB · 229 KB savings availableFIX
~229.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 51 resources | 4.8 MiB | ||||||
CImage OptimizationAction16 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
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
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
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 Execution Cost584ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://about.gitea.com/ | 162ms | 9ms | 0ms | 3rd |
| Unattributable | 105ms | 17ms | 0ms | 3rd |
| https://about.gitea.com/_nuxt/index.84b60db4.js | 103ms | 65ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-16517062921&cx=c>m=4e64h1 | 89ms | 77ms | 12ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-FN940L7CL7 | 74ms | 60ms | 13ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KW5NFLQL | 51ms | 41ms | 10ms | 3rd |
CJS BundlesAction21 scripts, 229 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-FN940L7CL7 | 173 KB | 69 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KW5NFLQL | 145 KB | 66 KB (45%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-16517062921&cx=c>m=4e64h1 | 147 KB | 57 KB (39%) | ✓ | 3rd |
| https://about.gitea.com/_nuxt/entry.3765936f.js | 80 KB | 38 KB (48%) | ✓ | 3rd |
| https://about.gitea.com/_nuxt/_plugin-vue_export-helper.c27b6911.js | 0 KB | — | ✓ | 3rd |
| https://about.gitea.com/_nuxt/nuxt-link.65e0e755.js | 2 KB | — | ✓ | 3rd |
| https://about.gitea.com/_nuxt/Newsletter.e292cc55.js | 11 KB | — | ✓ | 3rd |
| https://about.gitea.com/_nuxt/cookie.6a18c7a2.js | 4 KB | — | ✓ | 3rd |
| https://about.gitea.com/_nuxt/asyncData.15a86364.js | 5 KB | — | ✓ | 3rd |
| https://about.gitea.com/_nuxt/use-tree-walker.92dce54b.js | 1 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingmax-age=0, private, must-revalidate, no-transformREVIEW
max-age=0, private, must-revalidate, no-transform
| Directive | Value | Meaning |
|---|---|---|
| max-age | 0 | Cache for 0 seconds |
| private | — | Only browser cache, not CDN/proxy |
| must-revalidate | — | Must recheck with server after expiry |
| no-transform | — |
A+Text CompressionAll text resources are compressedPASS
A+Font LoadingNo web fonts (system fonts)PASS
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall51 requests over 3741msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
about.gitea.com about.gitea.com | Other | 162ms | 28 KB | — | €2/mo | Optional |
Unattributable Unattributable | Other | 105ms | 0 KB | — | €1/mo | Optional |
about.gitea.com about.gitea.com | Other | 103ms | 10 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 89ms | 147 KB | 39% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 74ms | 173 KB | 40% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 51ms | 145 KB | 45% | €1/mo | Optional |
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