Performance
· 23 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.
701 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.37 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.055
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.38 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.
2.00 s
Page Load Progression
FPage Weight BudgetAction2.9 MB transferred, 132 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
DPage Weight InventoryAction132 resources · 2.9 MB · 142 KB savings availableFIX
~141.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 132 resources | 2.9 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BThird-Party Impact50% third-party, 0 ms blockingREVIEW
BImage Optimization19 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BJS Execution Cost630ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://appeal.org.uk/ | 212ms | 2ms | 2ms | 1st |
| https://appeal.org.uk/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 168ms | 124ms | 2ms | 1st |
| Unattributable | 159ms | 3ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=GT-NBJ83N68 | 91ms | 71ms | 12ms | 3rd |
BJS Bundles56 scripts, 142 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=GT-NBJ83N68 | 163 KB | 68 KB (42%) | ✓ | 3rd |
| https://appeal.org.uk/wp-content/plugins/3d-flipbook-dflip-lite/assets/js/dflip.min.js?ver=2.4.30 | 62 KB | 51 KB (83%) | ✓ | 1st |
| https://appeal.org.uk/wp-content/plugins/real-time-auto-find-and-replace/assets/js/rtafar.app.min.js?ver=1.9.3 | 30 KB | 22 KB (75%) | ✓ | 1st |
| https://embed-cdn.spotifycdn.com/_next/static/chunks/8494-228b98ef7673b262.js | 4 KB | — | ✓ | 3rd |
| https://embed-cdn.spotifycdn.com/_next/static/chunks/5039.a54f1bd47316601a.js | 0 KB | — | ✓ | 3rd |
| https://appeal.org.uk/wp-content/plugins/bb-plugin/js/libs/jquery.imagesloaded.min.js?ver=2.10.0.6 | 2 KB | — | ✓ | 1st |
| https://appeal.org.uk/wp-content/plugins/bb-plugin/js/libs/jquery.infinitescroll.min.js?ver=2.10.0.6 | 12 KB | — | ✓ | 1st |
| https://appeal.org.uk/wp-content/uploads/bb-plugin/cache/10-layout.js?ver=b65d18580798f6ee219eb240ce22c6a9 | 10 KB | — | ✓ | 1st |
| https://appeal.org.uk/wp-content/plugins/real-time-auto-find-and-replace/assets/js/rtafar.local.js?ver=1.9.3 | 0 KB | — | ✓ | 1st |
| https://appeal.org.uk/wp-content/plugins/bb-plugin/js/libs/jquery.fitvids.min.js?ver=1.2 | 1 KB | — | ✓ | 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BCompression AlgorithmMain response uses gzip; brotli would be ~20% smallerREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
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 Loading7 fonts (481 KB)PASS
Web fonts
7
481 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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 ~136 KB and ~272 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Network Waterfall132 requests over 5776msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 91ms | 163 KB | 42% | £1/mo | Optional |
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-06-25 — 2026-07-22)
LCP (p75)
1298 ms
90% good
INP (p75)
71 ms
96% good
CLS (p75)
0.070
82% good
FCP (p75)
1203 ms
TTFB (p75)
827 ms
Image Optimization13 images, 515 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
13
Total Size
515 KB