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.
2.93 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
5.65 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.32 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.102
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.02 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.
12.44 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction7515ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://themuse-renderer.vercel.app/_next/static/chunks/4079-f47e719e5c7c38a5.js?dpl=dpl_E8YCzWew3D3mWkgSDYwPuH6R55gf | 4313ms | 3386ms | 22ms | 3rd |
| https://www.themuse.com/ | 544ms | 30ms | 19ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-P3K3QB | 535ms | 434ms | 77ms | 3rd |
| Unattributable | 532ms | 40ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HVJ4FGFQTL&cx=c&_slc=1 | 387ms | 321ms | 60ms | 3rd |
| https://themuse-renderer.vercel.app/_next/static/chunks/13-cdc5f09203cc5880.js?dpl=dpl_E8YCzWew3D3mWkgSDYwPuH6R55gf | 312ms | 272ms | 38ms | 3rd |
| https://themuse-renderer.vercel.app/_next/static/chunks/7eeef67d-82a5c25b638cfadd.js?dpl=dpl_E8YCzWew3D3mWkgSDYwPuH6R55gf | 293ms | 238ms | 21ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-699818781&cx=c>m=4e64k0 | 267ms | 215ms | 50ms | 3rd |
| https://themuse-renderer.vercel.app/_next/static/chunks/1409-e58039b54f182182.js?dpl=dpl_E8YCzWew3D3mWkgSDYwPuH6R55gf | 128ms | 9ms | 32ms | 3rd |
| https://snap.licdn.com/li.lms-analytics/insight.min.js | 77ms | 63ms | 7ms | 3rd |
Showing top 10 of 12 scripts
DJS BundlesAction31 scripts, 324 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-P3K3QB | 170 KB | 66 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HVJ4FGFQTL&cx=c&_slc=1 | 149 KB | 61 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-699818781&cx=c>m=4e64k0 | 138 KB | 60 KB (43%) | ✓ | 3rd |
| https://themuse-renderer.vercel.app/_next/static/chunks/13-cdc5f09203cc5880.js?dpl=dpl_E8YCzWew3D3mWkgSDYwPuH6R55gf | 84 KB | 44 KB (53%) | ✓ | 3rd |
| https://themuse-renderer.vercel.app/_next/static/chunks/1985-9c33629eb11e616b.js?dpl=dpl_E8YCzWew3D3mWkgSDYwPuH6R55gf | 54 KB | 40 KB (75%) | ✓ | 3rd |
| https://themuse-renderer.vercel.app/_next/static/chunks/1409-e58039b54f182182.js?dpl=dpl_E8YCzWew3D3mWkgSDYwPuH6R55gf | 62 KB | 27 KB (43%) | ✓ | 3rd |
| https://themuse-renderer.vercel.app/_next/static/chunks/5144-1d4b3a21bb1ac71e.js?dpl=dpl_E8YCzWew3D3mWkgSDYwPuH6R55gf | 58 KB | 25 KB (44%) | ✓ | 3rd |
| https://themuse-renderer.vercel.app/_next/static/chunks/9362-6174298785229294.js?dpl=dpl_E8YCzWew3D3mWkgSDYwPuH6R55gf | 11 KB | — | ✓ | 3rd |
| https://themuse-renderer.vercel.app/_next/static/chunks/1060-b52eea41634e81a2.js?dpl=dpl_E8YCzWew3D3mWkgSDYwPuH6R55gf | 5 KB | — | ✓ | 3rd |
| https://themuse-renderer.vercel.app/_next/static/chunks/4103-0113b625b23f227c.js?dpl=dpl_E8YCzWew3D3mWkgSDYwPuH6R55gf | 4 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
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
DPage Weight InventoryAction84 resources · 1.3 MB · 324 KB savings availableFIX
~324.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 84 resources | 1.3 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.3 MB transferred, 84 requestsREVIEW
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
A+Text CompressionAll text resources are compressedPASS
AImage Optimization15 images, 0 KB saveablePASS
A+Font Loading3 fonts (62 KB)PASS
Web fonts
3
62 KB total
Render-blocking
0
of 3
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 Hints13 hints, 0 missing preconnectsPASS
Current Resource Hints
13 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 Waterfall84 requests over 2699msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
themuse-renderer.vercel.app themuse-renderer.vercel.app | Other | 4313ms | 45 KB | — | €69/mo | Costly |
www.themuse.com www.themuse.com | Other | 544ms | 28 KB | — | €9/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 535ms | 170 KB | 39% | €9/mo | Costly |
Unattributable Unattributable | Other | 532ms | 0 KB | — | €9/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 387ms | 149 KB | 41% | €6/mo | Costly |
themuse-renderer.vercel.app themuse-renderer.vercel.app | Other | 312ms | 84 KB | 53% | €5/mo | Costly |
themuse-renderer.vercel.app themuse-renderer.vercel.app | Other | 293ms | 55 KB | — | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 267ms | 138 KB | 43% | €4/mo | Costly |
themuse-renderer.vercel.app themuse-renderer.vercel.app | Other | 128ms | 62 KB | 43% | €2/mo | Optional |
LinkedIn Insight snap.licdn.com | Advertising | 77ms | 19 KB | — | €1/mo | Optional |
Google Analytics www.google-analytics.com | Analytics | 72ms | 21 KB | — | €1/mo | Optional |
static.cloudflareinsights.com static.cloudflareinsights.com | Other | 54ms | 11 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- themuse-renderer.vercel.app adds 4313ms and costs ~€69/month
- www.themuse.com adds 544ms and costs ~€9/month
- Google Tag Manager adds 535ms and costs ~€9/month
- Unattributable adds 532ms and costs ~€9/month
- Google Tag Manager adds 387ms and costs ~€6/month
- themuse-renderer.vercel.app adds 312ms and costs ~€5/month
- themuse-renderer.vercel.app adds 293ms and costs ~€5/month
- Google Tag Manager adds 267ms and costs ~€4/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
themuse-renderer.vercel.app takes 4313ms 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
www.themuse.com takes 544ms 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 535ms 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 532ms 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 387ms 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
themuse-renderer.vercel.app takes 312ms 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
53% of themuse-renderer.vercel.app'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
themuse-renderer.vercel.app takes 293ms 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 267ms 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