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.
619 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
896 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.64 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.056
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.28 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.
8.89 s
Page Load Progression
1.3 s
2.6 s 3.9 s
5.2 s
6.5 s
7.8 s
9.1 s
10.4 sFPage Weight BudgetAction6.5 MB transferred, 275 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
FJS Execution CostAction6352ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://suno.com/_next/static/chunks/2c19ff3af3e5ae22.js | 2790ms | 2562ms | 29ms | 1st |
| https://suno.com/_next/static/chunks/7353e24091975271.js | 806ms | 385ms | 6ms | 1st |
| Unattributable | 771ms | 128ms | 0ms | 3rd |
| https://suno.com/ | 311ms | 12ms | 8ms | 1st |
| https://suno.com/9i3s/ | 231ms | 202ms | 21ms | 1st |
| https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js | 213ms | 157ms | 21ms | 3rd |
| https://suno.com/9i3s/gtd?id=AW-G-7B0KEDD7XP&cx=c>m=4e64k1 | 135ms | 101ms | 15ms | 1st |
| https://suno.com/9i3s/?id=G-7B0KEDD7XP&cx=c>m=4e64k1 | 130ms | 105ms | 23ms | 1st |
| https://js.stripe.com/dahlia/stripe.js | 119ms | 75ms | 43ms | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js | 116ms | 93ms | 20ms | 3rd |
Showing top 10 of 20 scripts
FJS BundlesAction136 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 | 255 KB | 185 KB (73%) | ✓ | 3rd |
| https://suno.com/9i3s/?id=AW-16548013531&cx=c>m=4e64k1 | 183 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 | 118 KB | 84 KB (72%) | ✓ | 3rd |
| https://suno.com/9i3s/gtd?id=AW-G-7B0KEDD7XP&cx=c>m=4e64k1 | 140 KB | 74 KB (53%) | ✓ | 1st |
| 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 |
| https://accounts.google.com/gsi/client | 96 KB | 68 KB (71%) | ✓ | 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 InventoryAction275 resources · 6.5 MB · 2.0 MB savings availableFIX
~2.0 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 275 resources | 6.5 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 Impact48% third-party, 0 ms blockingREVIEW
BImage Optimization42 images, 0 KB saveableREVIEW
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (180 KB)PASS
Web fonts
3
180 KB total
Render-blocking
0
of 3
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
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 ~54 KB and ~108 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall275 requests over 9914msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 771ms | 0 KB | — | €13/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 213ms | 128 KB | 54% | €4/mo | Essential |
Stripe js.stripe.com | Payment | 119ms | 255 KB | 73% | €2/mo | Essential |
analytics.tiktok.com analytics.tiktok.com | Other | 116ms | 110 KB | 50% | €2/mo | Optional |
Microsoft Clarity scripts.clarity.ms | Session Replay | 111ms | 26 KB | — | €2/mo | Optional |
auth.suno.com auth.suno.com | Other | 79ms | 118 KB | 72% | €1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 79ms | 45 KB | — | €1/mo | Optional |
auth.suno.com auth.suno.com | Other | 67ms | 43 KB | — | €1/mo | Optional |
auth.suno.com auth.suno.com | Other | 66ms | 84 KB | 67% | €1/mo | Optional |
analytics.tiktok.com analytics.tiktok.com | Other | 57ms | 40 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 56ms | 162 KB | 64% | €1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 56ms | 97 KB | 34% | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 771ms and costs ~€13/month
Unattributable takes 771ms 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
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
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
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