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.
957 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.62 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.005
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.03 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.
1.62 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 sDThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.2 MB transferred, 83 requestsREVIEW
BImage Optimization3 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 Cost545ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://home.unicode.org/ | 328ms | 5ms | 3ms | 3rd |
| Unattributable | 129ms | 17ms | 0ms | 3rd |
| https://home.unicode.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 89ms | 62ms | 2ms | 3rd |
BJS Bundles59 scripts, 64 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-JP5GS8YZK5&cx=c&_slc=1 | 148 KB | 64 KB (43%) | ✓ | 3rd |
| https://home.unicode.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 33 KB | — | ✓ | 3rd |
| https://home.unicode.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1 | 5 KB | — | ✓ | 3rd |
| https://home.unicode.org/wp-content/themes/unicode/submenu.js?ver=1 | 1 KB | — | ✓ | 3rd |
| https://home.unicode.org/wp-content/themes/unicode/hero.js?1776802806&ver=1 | 1 KB | — | ✓ | 3rd |
| https://home.unicode.org/wp-content/plugins/easy-fancybox/vendor/purify.min.js?ver=6.9.4 | 9 KB | — | ✓ | 3rd |
| https://home.unicode.org/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.fancybox.min.js?ver=6.9.4 | 6 KB | — | ✓ | 3rd |
| https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/cssua.js?ver=2.1.28 | 2 KB | — | ✓ | 3rd |
| https://home.unicode.org/wp-content/plugins/fusion-builder/assets/js/min/general/fusion-animations.js?ver=3.13.2 | 1 KB | — | ✓ | 3rd |
| https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/general/awb-tabs-widget.js?ver=3.13.2 | 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
CPage Weight InventoryAction83 resources · 1.2 MB · 64 KB savings availableREVIEW
~63.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 83 resources | 1.2 MiB | ||||||
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (78 KB)PASS
Web fonts
3
78 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
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 ~7 KB and ~14 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 Waterfall83 requests over 1122msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
home.unicode.org home.unicode.org | Other | 328ms | 196 KB | — | $2/mo | Costly |
Unattributable Unattributable | Other | 129ms | 0 KB | — | $1/mo | Optional |
home.unicode.org home.unicode.org | Other | 89ms | 33 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- home.unicode.org adds 328ms and costs ~$2/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
home.unicode.org takes 328ms 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