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.
1.04 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.60 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
8 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.
1.17 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.
3.10 s
Page Load Progression
FPage Weight BudgetAction2.9 MB transferred, 298 requestsFIX
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
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction298 resources · 2.9 MB · 297 KB savings availableFIX
~296.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 298 resources | 2.9 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization241 images, 0 KB saveableREVIEW
CJS Execution CostAction1376ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 857ms | 22ms | 0ms | 3rd |
| https://www.comptia.org/en-eu/ | 160ms | 2ms | 2ms | 3rd |
| https://www.comptia.org/_next/static/chunks/117-8f652c678b855060.js | 144ms | 125ms | 10ms | 3rd |
| https://www.comptia.org/metrics/?id=GTM-M647LGC7 | 90ms | 67ms | 11ms | 3rd |
| https://cdn.optimizely.com/js/26330300728.js | 66ms | 54ms | 8ms | 3rd |
| https://www.comptia.org/metrics/?id=G-Z1ZV6990VN&cx=c>m=4e64k0 | 59ms | 43ms | 14ms | 3rd |
CJS BundlesAction23 scripts, 297 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.comptia.org/metrics/?id=G-Z1ZV6990VN&cx=c>m=4e64k0 | 186 KB | 74 KB (40%) | ✓ | 3rd |
| https://www.comptia.org/metrics/?id=AW-761327116&cx=c>m=4e64k0 | 151 KB | 70 KB (46%) | ✓ | 3rd |
| https://www.comptia.org/metrics/?id=GTM-M647LGC7 | 182 KB | 68 KB (37%) | ✓ | 3rd |
| https://cdn.optimizely.com/js/26330300728.js | 110 KB | 44 KB (40%) | ✓ | 3rd |
| https://www.comptia.org/_next/static/chunks/481-6ed8db471396a010.js | 47 KB | 41 KB (94%) | ✓ | 3rd |
| https://www.comptia.org/_next/static/chunks/897-0279cc2b75b706b9.js | 24 KB | — | ✓ | 3rd |
| https://www.comptia.org/_next/static/chunks/webpack-a6ee78a2c30335ab.js | 5 KB | — | ✓ | 3rd |
| https://www.comptia.org/_next/static/chunks/117-8f652c678b855060.js | 36 KB | — | ✓ | 3rd |
| https://www.comptia.org/_next/static/chunks/main-app-2dcde4753ea0d175.js | 4 KB | — | ✓ | 3rd |
| https://www.comptia.org/_next/static/chunks/3-f9ec505e18393b17.js | 6 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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading1 fonts (448 KB)PASS
Web fonts
1
448 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- 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 ~359 KB and ~718 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 Waterfall298 requests over 2969msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 857ms | 0 KB | — | €15/mo | Costly |
www.comptia.org www.comptia.org | Other | 160ms | 38 KB | — | €3/mo | Optional |
www.comptia.org www.comptia.org | Other | 144ms | 36 KB | — | €2/mo | Optional |
www.comptia.org www.comptia.org | Other | 90ms | 182 KB | 37% | €2/mo | Optional |
Optimizely cdn.optimizely.com | A/B Testing | 66ms | 110 KB | 40% | €1/mo | Optional |
www.comptia.org www.comptia.org | Other | 59ms | 186 KB | 40% | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 857ms and costs ~€15/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
Unattributable takes 857ms 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