Performance
· 17 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.
5.29 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.98 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
404 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.
5.50 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.
7.98 s
Page Load Progression
FJS Execution CostAction6669ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://writeablog.net/assets/js/jquery-1.12.4.min.js | 2831ms | 2354ms | 14ms | 1st |
| https://writeablog.net/ | 2807ms | 5ms | 1ms | 1st |
| Unattributable | 581ms | 7ms | 0ms | 3rd |
| https://writeablog.net/assets/js/jquery-ui.min.js | 298ms | 74ms | 28ms | 1st |
| https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516 | 88ms | 63ms | 4ms | 3rd |
| https://writeablog.net/assets/js/angular.min.js | 63ms | 21ms | 16ms | 1st |
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization4 images, 0 KB saveableREVIEW
BJS Bundles23 scripts, 88 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://writeablog.net/assets/js/jquery-ui.min.js | 66 KB | 59 KB (90%) | ✓ | 1st |
| https://writeablog.net/assets/js/angular.min.js | 48 KB | 28 KB (59%) | ✓ | 1st |
| https://writeablog.net/assets/js/wow.min.js | 3 KB | — | ✓ | 1st |
| https://writeablog.net/assets/js/bootstrap.min.js | 11 KB | — | ✓ | 1st |
| https://writeablog.net/assets/js/modernizr.custom.js | 4 KB | — | ✓ | 1st |
| https://writeablog.net/assets/js/app.js | 1 KB | — | ✓ | 1st |
| https://writeablog.net/assets/js/controllers.js | 1 KB | — | ✓ | 1st |
| https://writeablog.net/assets/js/owl.carousel.min.js | 12 KB | — | ✓ | 1st |
| https://writeablog.net/assets/js/notifyMe.js | 2 KB | — | ✓ | 1st |
| https://writeablog.net/assets/js/froogaloop2.min.js | 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
APage Weight Budget986 KB transferred, 56 requestsPASS
A+Third-Party Impact10% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (197 KB)PASS
Web fonts
6
197 KB total
Render-blocking
0
of 6
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 ~16 KB and ~32 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Page Weight Inventory56 resources · 986 KB · 88 KB savings availablePASS
~87.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 56 resources | 986.4 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall56 requests over 712msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 581ms | 0 KB | — | $8/mo | Costly |
static.cloudflareinsights.com static.cloudflareinsights.com | Other | 88ms | 11 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 581ms and costs ~$8/month
Unattributable takes 581ms 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