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.
1.15 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.67 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
9 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.076
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.77 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.
3.19 s
Page Load Progression
FPage Weight BudgetAction2.8 MB transferred, 75 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
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
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS BundlesAction31 scripts, 494 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 242 KB (67%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-T8GN4FV | 167 KB | 68 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-MBKB5H5HCP&cx=c>m=4e64k0 | 164 KB | 65 KB (39%) | ✓ | 3rd |
| https://consent.eiu.com/Notice.8f529.js | 91 KB | 61 KB (68%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-877114695 | 144 KB | 58 KB (40%) | ✓ | 3rd |
| https://www.eiu.com/n/wp-content/plugins/woocommerce/assets/js/frontend/order-attribution.min.js?ver=10.4.3 | 1 KB | — | ✓ | 3rd |
| https://www.eiu.com/n/wp-content/plugins/woocommerce/assets/js/frontend/add-to-cart.min.js?ver=10.4.3 | 2 KB | — | ✓ | 3rd |
| https://www.eiu.com/n/wp-content/plugins/woocommerce-multi-currency/js/woocommerce-multi-currency-switcher.js?ver=2.3.2 | 2 KB | — | ✓ | 3rd |
| https://www.eiu.com/n/wp-content/plugins/woo-discount-rules/v2/Assets/Js/site_main.js?ver=2.6.13 | 2 KB | — | ✓ | 3rd |
| blob:https://www.eiu.com/e9790851-1672-4f7c-b184-d99f315d1459 | -0 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
FPage Weight InventoryAction75 resources · 2.8 MB · 494 KB savings availableFIX
~493.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 75 resources | 2.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization9 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
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 Cost652ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 136ms | 2ms | 0ms | 3rd |
| https://www.eiu.com/n/ | 125ms | 9ms | 2ms | 3rd |
| https://consent.eiu.com/Notice.8f529.js | 98ms | 76ms | 8ms | 3rd |
| https://consent.eiu.com/index.html?hasCsp=true&message_id=1457700&consentUUID=null&consent_origin=https%3A%2F%2Fconsent.eiu.com%2Fconsent%2Ftcfv2&preload_message=true&version=v1 | 88ms | 0ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-MBKB5H5HCP&cx=c>m=4e64k0 | 70ms | 58ms | 11ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-T8GN4FV | 68ms | 57ms | 10ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-877114695 | 66ms | 57ms | 9ms | 3rd |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading10 fonts (560 KB)PASS
Web fonts
10
560 KB total
Render-blocking
0
of 10
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
- 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 ~130 KB and ~260 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 Waterfall75 requests over 1635msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 136ms | 0 KB | — | £1/mo | Optional |
www.eiu.com www.eiu.com | Other | 125ms | 21 KB | — | £1/mo | Optional |
consent.eiu.com consent.eiu.com | Other | 98ms | 91 KB | 68% | £1/mo | Optional |
consent.eiu.com consent.eiu.com | Other | 88ms | 2 KB | — | £0/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 70ms | 164 KB | 39% | £0/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 68ms | 167 KB | 41% | £0/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 66ms | 144 KB | 40% | £0/mo | Optional |
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
68% of consent.eiu.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