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.
1.38 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.26 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
318 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.379
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.64 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.
4.74 s
Page Load Progression
FPage Weight BudgetAction4.0 MB transferred, 110 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
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
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
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 ImpactAction63% third-party, 0 ms blockingFIX
DJS Execution CostAction2295ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://myanimelist.net/static/assets/js/pc/all-96bd52aeae.js | 449ms | 158ms | 51ms | 1st |
| https://myanimelist.net/ | 318ms | 4ms | 2ms | 1st |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 302ms | 252ms | 31ms | 3rd |
| https://cmp.inmobi.com/tcfv2/cmp2.js?referer=myanimelist.net | 258ms | 169ms | 19ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-26FEP9527K&cx=c>m=4e64h1h1 | 250ms | 230ms | 19ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WL4QW3G | 212ms | 194ms | 14ms | 3rd |
| Unattributable | 205ms | 2ms | 0ms | 3rd |
| https://cmp.inmobi.com/tcfv2/61/cmp2ui-en.js | 159ms | 94ms | 19ms | 3rd |
| https://myanimelist.net/static/assets/js/pc/header-aeab8bb434.js | 142ms | 112ms | 10ms | 1st |
FJS BundlesAction14 scripts, 1.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://myanimelist.net/static/assets/js/pc/all-96bd52aeae.js | 376 KB | 253 KB (67%) | ✓ | 1st |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 177 KB (49%) | ✓ | 3rd |
| https://cmp.inmobi.com/tcfv2/cmp2.js?referer=myanimelist.net | 134 KB | 66 KB (50%) | ✓ | 3rd |
| https://cmp.inmobi.com/tcfv2/61/cmp2ui-en.js | 125 KB | 60 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-26FEP9527K&cx=c>m=4e64h1h1 | 174 KB | 60 KB (34%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WL4QW3G | 138 KB | 59 KB (43%) | ✓ | 3rd |
| https://myanimelist.net/static/assets/js/pc/header-aeab8bb434.js | 93 KB | 55 KB (59%) | ✓ | 1st |
| https://myanimelist.net/js/quantcast_choice.js?v=1776808828 | 3 KB | — | ✓ | 1st |
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 InventoryAction110 resources · 4.0 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 110 resources | 4.0 MiB | ||||||
CImage OptimizationAction67 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingno-cacheREVIEW
no-cache
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (497 KB)PASS
Web fonts
3
497 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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)
Fixing the unchecked items could save ~231 KB and ~462 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall110 requests over 3718msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.gstatic.com www.gstatic.com | Other | 302ms | 0 KB | 49% | ¥418/mo | Costly |
cmp.inmobi.com cmp.inmobi.com | Other | 258ms | 134 KB | 50% | ¥356/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 250ms | 174 KB | 34% | ¥345/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 212ms | 138 KB | 43% | ¥293/mo | Costly |
Unattributable Unattributable | Other | 205ms | 0 KB | — | ¥284/mo | Costly |
cmp.inmobi.com cmp.inmobi.com | Other | 159ms | 125 KB | 48% | ¥220/mo | Costly |
These scripts may cost more than they're worth
- www.gstatic.com adds 302ms and costs ~¥418/month
- cmp.inmobi.com adds 258ms and costs ~¥356/month
- Google Tag Manager adds 250ms and costs ~¥345/month
- Google Tag Manager adds 212ms and costs ~¥293/month
- Unattributable adds 205ms and costs ~¥284/month
- cmp.inmobi.com adds 159ms and costs ~¥220/month
60% 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
www.gstatic.com takes 302ms 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
cmp.inmobi.com takes 258ms 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
Google Tag Manager takes 250ms 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
Google Tag Manager takes 212ms 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 205ms 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
cmp.inmobi.com takes 159ms 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