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.
2.25 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
15.55 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
9.28 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.019
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
12.40 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.
39.32 s
Page Load Progression
1.1 s
2.1 s
3.2 s
4.2 s
5.3 s
6.3 s
7.4 s
8.4 sFPage Weight BudgetAction5.9 MB transferred, 256 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
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
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
FJS Execution CostAction21603ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://suno.com/_next/static/chunks/2c19ff3af3e5ae22.js | 8386ms | 7732ms | 172ms | 1st |
| Unattributable | 2773ms | 835ms | 0ms | 3rd |
| https://suno.com/ | 2025ms | 49ms | 26ms | 1st |
| https://suno.com/_next/static/chunks/7353e24091975271.js | 1887ms | 876ms | 9ms | 1st |
| https://suno.com/9i3s/ | 826ms | 696ms | 108ms | 1st |
| https://suno.com/9i3s/gtd?id=AW-G-7B0KEDD7XP&cx=c>m=4e64k1 | 583ms | 440ms | 68ms | 1st |
| https://suno.com/9i3s/?id=G-7B0KEDD7XP&cx=c>m=4e64k1 | 579ms | 437ms | 135ms | 1st |
| https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js | 542ms | 371ms | 92ms | 3rd |
| https://scripts.clarity.ms/0.8.59/clarity.js | 402ms | 342ms | 25ms | 3rd |
| https://js.stripe.com/dahlia/stripe.js | 394ms | 242ms | 151ms | 3rd |
Showing top 10 of 30 scripts
FJS BundlesAction130 scripts, 2.0 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://suno.com/_next/static/chunks/9f17fe07bafbc956.js | 449 KB | 343 KB (76%) | ✓ | 1st |
| https://js.stripe.com/dahlia/stripe.js | 221 KB | 161 KB (73%) | ✓ | 3rd |
| https://suno.com/9i3s/?id=AW-16548013531&cx=c>m=4e64k1 | 184 KB | 121 KB (66%) | ✓ | 1st |
| https://suno.com/_next/static/chunks/5301e38c354df19f.js | 118 KB | 107 KB (91%) | ✓ | 1st |
| https://www.googletagmanager.com/gtm.js?id=GTM-NQ9L4VGG | 162 KB | 104 KB (64%) | ✓ | 3rd |
| https://auth.suno.com/npm/@clerk/clerk-js@5.117.0/dist/ui-common_clerk.browser_434d46_5.117.0.js | 117 KB | 84 KB (72%) | ✓ | 3rd |
| https://suno.com/9i3s/gtd?id=AW-G-7B0KEDD7XP&cx=c>m=4e64k1 | 140 KB | 73 KB (52%) | ✓ | 1st |
| https://accounts.google.com/gsi/client | 96 KB | 71 KB (75%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js | 128 KB | 70 KB (54%) | ✓ | 3rd |
| https://suno.com/_next/static/chunks/2c19ff3af3e5ae22.js | 172 KB | 68 KB (40%) | ✓ | 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 InventoryAction256 resources · 5.9 MB · 2.0 MB savings availableFIX
~2.0 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 256 resources | 5.9 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
private, no-cache, no-store, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
BThird-Party Impact43% third-party, 0 ms blockingREVIEW
BImage Optimization42 images, 0 KB saveableREVIEW
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (245 KB)PASS
Web fonts
4
245 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
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 ~74 KB and ~148 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints5 hints, 0 missing preconnectsPASS
Current Resource Hints
5 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources 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 Waterfall256 requests over 8089msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 2773ms | 0 KB | — | €48/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 542ms | 128 KB | 54% | €9/mo | Essential |
Microsoft Clarity scripts.clarity.ms | Session Replay | 402ms | 26 KB | — | €7/mo | Costly |
Stripe js.stripe.com | Payment | 394ms | 221 KB | 73% | €7/mo | Essential |
analytics.tiktok.com analytics.tiktok.com | Other | 363ms | 110 KB | 49% | €6/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 250ms | 45 KB | — | €4/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 245ms | 97 KB | 34% | €4/mo | Costly |
auth.suno.com auth.suno.com | Other | 239ms | 84 KB | 67% | €4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 192ms | 162 KB | 64% | €3/mo | Optional |
goto.suno.com goto.suno.com | Other | 175ms | 21 KB | — | €3/mo | Optional |
auth.suno.com auth.suno.com | Other | 174ms | 117 KB | 72% | €3/mo | Optional |
auth.suno.com auth.suno.com | Other | 134ms | 43 KB | — | €2/mo | Optional |
accounts.google.com accounts.google.com | Other | 107ms | 96 KB | 75% | €2/mo | Optional |
auth.suno.com auth.suno.com | Other | 104ms | 3 KB | — | €2/mo | Optional |
d2hrivdxn8ekm8.cloudfront.net d2hrivdxn8ekm8.cloudfront.net | Other | 92ms | 15 KB | — | €2/mo | Optional |
Twitter/X Pixel static.ads-twitter.com | Advertising | 92ms | 13 KB | — | €2/mo | Optional |
Bing UET bat.bing.com | Advertising | 86ms | 16 KB | — | €2/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 83ms | 9 KB | — | €1/mo | Essential |
analytics.tiktok.com analytics.tiktok.com | Other | 78ms | 40 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 2773ms and costs ~€48/month
- Microsoft Clarity adds 402ms and costs ~€7/month
- analytics.tiktok.com adds 363ms and costs ~€6/month
- Facebook Pixel adds 250ms and costs ~€4/month
- Facebook Pixel adds 245ms and costs ~€4/month
- auth.suno.com adds 239ms and costs ~€4/month
Unattributable takes 2773ms 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
54% of OneTrust'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
Microsoft Clarity takes 402ms 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
73% of Stripe'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
analytics.tiktok.com takes 363ms 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
Facebook Pixel 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
Facebook Pixel takes 245ms 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
auth.suno.com takes 239ms 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
67% of auth.suno.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
64% of Google Tag Manager'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
72% of auth.suno.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
75% of accounts.google.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