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.
857 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.05 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
514 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.82 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.
6.30 s
Page Load Progression
375 ms 750 ms 1.1 s
1.5 s 1.9 s
2.2 s 2.6 s 3.0 sFPage Weight BudgetAction3.7 MB transferred, 193 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction4357ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.f5.com/_next/static/chunks/5005-fb93f13cb032b960.js?dpl=dpl_42ZhdrupKm1c1MNy1ynneW52JM8C | 1837ms | 636ms | 1ms | 3rd |
| https://skawa-easyling.cdn.easyling.com/client/63iw3vww/reporter/en-US.js | 508ms | 477ms | 19ms | 3rd |
| Unattributable | 456ms | 11ms | 0ms | 3rd |
| https://www.f5.com/ | 290ms | 6ms | 12ms | 3rd |
| https://www.f5.com/_next/static/chunks/1684-c2a4dfbf19bd03d1.js?dpl=dpl_42ZhdrupKm1c1MNy1ynneW52JM8C | 289ms | 236ms | 10ms | 3rd |
| https://www.f5.com/_next/static/chunks/549ca77c-9261eb57d3bef9bc.js?dpl=dpl_42ZhdrupKm1c1MNy1ynneW52JM8C | 231ms | 0ms | 230ms | 3rd |
| https://www.f5.com/_next/static/chunks/webpack-406f9bfd707c408c.js?dpl=dpl_42ZhdrupKm1c1MNy1ynneW52JM8C | 193ms | 193ms | 0ms | 3rd |
| https://mktg.tags.f5.com/main/prod/utag.sync.js | 113ms | 98ms | 6ms | 3rd |
| https://mktg.tags.f5.com/main/prod/utag.js | 106ms | 89ms | 6ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-89EY6SNB5Y&cx=c>m=4e64f0&bs=ctrl2 | 89ms | 71ms | 17ms | 3rd |
Showing top 10 of 13 scripts
FJS BundlesAction92 scripts, 1.9 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.f5.com/_next/static/chunks/549ca77c-9261eb57d3bef9bc.js?dpl=dpl_42ZhdrupKm1c1MNy1ynneW52JM8C | 1583 KB | 1536 KB (97%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-89EY6SNB5Y&cx=c>m=4e64f0&bs=ctrl2 | 156 KB | 63 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-5322751 | 130 KB | 58 KB (45%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-11283378&cx=c>m=4e64f0&bs=ctrl2 | 131 KB | 57 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-528895284&cx=c>m=4e64f0&bs=ctrl2 | 144 KB | 56 KB (39%) | ✓ | 3rd |
| https://www.f5.com/_next/static/chunks/8274-5040ec944eb9c798.js?dpl=dpl_42ZhdrupKm1c1MNy1ynneW52JM8C | 38 KB | 34 KB (90%) | ✓ | 3rd |
| https://www.f5.com/_next/static/chunks/3564-1cb1b7fade2873c4.js?dpl=dpl_42ZhdrupKm1c1MNy1ynneW52JM8C | 35 KB | 28 KB (81%) | ✓ | 3rd |
| https://mktg.tags.f5.com/main/prod/utag.sync.js | 55 KB | 26 KB (47%) | ✓ | 3rd |
| https://mktg.tags.f5.com/main/prod/utag.js | 50 KB | 25 KB (50%) | ✓ | 3rd |
| https://consent.trustarc.com/asset/notice.js/v/v1.7-1729 | 36 KB | 22 KB (62%) | ✓ | 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 InventoryAction193 resources · 3.7 MB · 1.9 MB savings availableFIX
~1.9 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 193 resources | 3.7 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization43 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading8 fonts (169 KB)PASS
Web fonts
8
169 KB total
Render-blocking
0
of 8
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 HintsNo optimization neededPASS
Network Waterfall193 requests over 43298msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.f5.com www.f5.com | Other | 1837ms | 8 KB | — | $32/mo | Costly |
skawa-easyling.cdn.easyling.com skawa-easyling.cdn.easyling.com | Other | 508ms | 0 KB | — | $9/mo | Costly |
Unattributable Unattributable | Other | 456ms | 0 KB | — | $8/mo | Costly |
www.f5.com www.f5.com | Other | 290ms | 98 KB | — | $5/mo | Costly |
www.f5.com www.f5.com | Other | 289ms | 46 KB | — | $5/mo | Costly |
www.f5.com www.f5.com | Other | 231ms | 1583 KB | 97% | $4/mo | Costly |
www.f5.com www.f5.com | Other | 193ms | 3 KB | — | $3/mo | Optional |
mktg.tags.f5.com mktg.tags.f5.com | Other | 113ms | 55 KB | 47% | $2/mo | Optional |
mktg.tags.f5.com mktg.tags.f5.com | Other | 106ms | 50 KB | 50% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 89ms | 156 KB | 41% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 89ms | 144 KB | 39% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 82ms | 130 KB | 45% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 76ms | 131 KB | 43% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.f5.com adds 1837ms and costs ~$32/month
- skawa-easyling.cdn.easyling.com adds 508ms and costs ~$9/month
- Unattributable adds 456ms and costs ~$8/month
- www.f5.com adds 290ms and costs ~$5/month
- www.f5.com adds 289ms and costs ~$5/month
- www.f5.com adds 231ms 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
www.f5.com takes 1837ms 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
skawa-easyling.cdn.easyling.com takes 508ms 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 456ms 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.f5.com takes 290ms 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.f5.com takes 289ms 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.f5.com takes 231ms 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
97% of www.f5.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
50% of mktg.tags.f5.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