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https://www.iololi.com

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
1
REVIEW
6
PASS
16
INFO
3

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
93
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
85
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.31 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.76 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.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.46 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.

2.76 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 s
Checks
26
16 PASS 6 REVIEW 1 FIX
D
Third-Party Impact
Action
80% third-party, 0 ms blocking
FIX
80% third-party, 0 ms blocking
Warning::
Third-party code accounts for 80% of page weight (167.9 KiB of 210.6 KiB)
Info::
Third-party blocking time is low (0 ms)
20%
80%
First-party Third-party
C
JS Execution Cost
Action
1400ms total JS execution
REVIEW
1400ms total JS execution
Warning::
https://static-global.iololi.com/wp-content/themes...: 658ms CPU time
Warning::
https://www.iololi.com/: 572ms CPU time
Info::
Unattributable: 170ms CPU time
Info::
Third-party scripts: 658ms (47% of total)

Main Thread Breakdown

Other 49% Style & Layout 28% Script Evaluation 13% Rendering 6% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://static-global.iololi.com/wp-content/themes/Origami/js/mouse.js658ms147ms1ms3rd
https://www.iololi.com/572ms10ms2ms1st
Unattributable170ms7ms0ms1st
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
B
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
REVIEW
Main response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
public, max-age=0, no-cache, no-transform
REVIEW
public, max-age=0, no-cache, no-transform
Info::
Cache-Control header is set
Got: public, max-age=0, no-cache, no-transform
Info::
Last-Modified header present
Cache-Control

public, max-age=0, no-cache, no-transform

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
no-cache—Cache but always revalidate first
no-transform—
A+
Page Weight Budget
211 KB transferred, 17 requests
PASS
211 KB transferred, 17 requests
Info::
Page weighs 466 KB (211 KB transferred)
Info::
17 HTTP requests
Info::
Estimated 0.04 g CO2 per page load
211 KB / 2.4 MB budget
211 KB transferred
17 requests
0.04 g CO2 per page load
Fonts 75.9 KiB 36%
JavaScript 46.0 KiB 22%
CSS 43.2 KiB 21%
Images 34.9 KiB 17%
HTML 9.4 KiB 4%
Other 1.1 KiB 1%
0 2.4 MB 4.9 MB
Under budget
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Image Optimization
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 35 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
1 fonts (76 KB)
PASS
1 fonts (76 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

76 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.3 s LCP 2.8 shttps://static-global.iololi.com/wp-content/themes/Origami/fonts/fontawesome-webfont.woff2?v=4.7.0fontawesome-webfont.woff2 https://static-global.iololi.com/wp-content/themes/Origami/fonts/fontawesome-webfont.woff2?v=4.7.0 — 75.9 KiB — 296 ms — font-display: swap
fontawesome-webfont.woff2 woff2 swap
Size 76 KB
Load time 296 ms
Start 493 ms
Risk FOUT — text flashes from fallback to web font
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)
A
JS Bundles
4 scripts, 0 KB unused
PASS
4 scripts, 0 KB unused
Warning::
https://static-global.iololi.com/wp-content/themes...: unminified — 5 KB could be saved
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static-global.iololi.com/wp-content/themes/Origami/js/qrcode.min.js20 KB—✓3rd
https://static-global.iololi.com/wp-content/themes/Origami/js/SMValidator.min.js5 KB—✓3rd
https://static-global.iololi.com/wp-content/themes/Origami/js/mouse.js2 KB—✓3rd
https://static-global.iololi.com/wp-content/themes/Origami/js/main.js19 KB—✗3rd
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
—
preload
1
dns-prefetch
—
prefetch
—

1 resource hints configured

A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML uses no-cache -- safe revalidate-on-request policy
PASS
Main HTML uses no-cache -- safe revalidate-on-request policy
Info::
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: public, max-age=0, no-cache, no-transform
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
A
Page Weight Inventory
17 resources · 211 KB · 0 KB savings available
PASS
17 resources · 211 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 211 KB
Warning::
13 third-party resources (80% of weight)
17 resources · 210.6 KiB · 13 third-party Within 1MB page-weight target
Font 36% · 75.9 KiB
JavaScript 22% · 46.0 KiB
CSS 21% · 43.2 KiB
Image 17% · 35.4 KiB
Document 5% · 10.0 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
4 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
A
CSS Performance Depth
1 CSS depth issue(s) detected
PASS
1 CSS depth issue(s) detected
Warning::
6 render-blocking stylesheet(s) -- recommended: <=3
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Network Waterfall
17 requests over 2107ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.3 s LCP 2.8 shttps://www.iololi.com// https://www.iololi.com/ — 200 — 9.4 KiB — 508 ms — h2https://static-global.iololi.com/wp-content/themes/Origami/fonts/fontawesome-webfont.woff2?v=4.7.0static-global.iololi.com/wp-content... https://static-global.iololi.com/wp-content/themes/Origami/fonts/fontawesome-webfont.woff2?v=4.7.0 — 200 — 75.9 KiB — 296 ms — h2https://static-global.iololi.com/wp-content/themes/Origami/css/spectre.min.cssstatic-global.iololi.com/wp-content... https://static-global.iololi.com/wp-content/themes/Origami/css/spectre.min.css — 200 — 12.3 KiB — 144 ms — h2https://static-global.iololi.com/wp-content/themes/Origami/css/spectre-exp.min.cssstatic-global.iololi.com/wp-content... https://static-global.iololi.com/wp-content/themes/Origami/css/spectre-exp.min.css — 200 — 4.9 KiB — 149 ms — h2https://static-global.iololi.com/wp-content/themes/Origami/css/spectre-icons.min.cssstatic-global.iololi.com/wp-content... https://static-global.iololi.com/wp-content/themes/Origami/css/spectre-icons.min.css — 200 — 2.2 KiB — 158 ms — h2https://static-global.iololi.com/wp-content/themes/Origami/style.cssstatic-global.iololi.com/wp-content... https://static-global.iololi.com/wp-content/themes/Origami/style.css — 200 — 15.3 KiB — 158 ms — h2https://static-global.iololi.com/wp-content/themes/Origami/css/font-awesome.min.cssstatic-global.iololi.com/wp-content... https://static-global.iololi.com/wp-content/themes/Origami/css/font-awesome.min.css — 200 — 7.9 KiB — 396 ms — h2https://static-global.iololi.com/wp-content/themes/Origami/css/mouse.cssstatic-global.iololi.com/wp-content... https://static-global.iololi.com/wp-content/themes/Origami/css/mouse.css — 200 — 655 B — 140 ms — h2https://www.iololi.com/wp-content/uploads/2026/07/favicon.webp/wp-content/uploads/2026/07/favicon... https://www.iololi.com/wp-content/uploads/2026/07/favicon.webp — 200 — 1.7 KiB — 197 ms — h2https://cravatar.cn/avatar/b6c1bb40f2a7310b5e05ded6d3f89ed18349090d8bb83f06a5efff5045e51dee?s=96&d=mm&r=gcravatar.cn/avatar/b6c1bb40f2a7310b... https://cravatar.cn/avatar/b6c1bb40f2a7310b5e05ded6d3f89ed18349090d8bb83f06a5efff5045e51dee?s=96&d=mm&r=g — 301 — 568 B — 87 ms — h3https://www.iololi.com/wp-content/themes/Origami/image/origami.png/wp-content/themes/Origami/image/or... https://www.iololi.com/wp-content/themes/Origami/image/origami.png — 200 — 31.0 KiB — 274 ms — h2https://cn.cravatar.com/avatar/b6c1bb40f2a7310b5e05ded6d3f89ed18349090d8bb83f06a5efff5045e51dee?s=96&d=mm&r=gcn.cravatar.com/avatar/b6c1bb40f2a7... https://cn.cravatar.com/avatar/b6c1bb40f2a7310b5e05ded6d3f89ed18349090d8bb83f06a5efff5045e51dee?s=96&d=mm&r=g — 200 — 2.2 KiB — 402 ms — h2https://static-global.iololi.com/wp-content/themes/Origami/js/qrcode.min.jsstatic-global.iololi.com/wp-content... https://static-global.iololi.com/wp-content/themes/Origami/js/qrcode.min.js — 200 — 19.8 KiB — 321 ms — h2https://static-global.iololi.com/wp-content/themes/Origami/js/SMValidator.min.jsstatic-global.iololi.com/wp-content... https://static-global.iololi.com/wp-content/themes/Origami/js/SMValidator.min.js — 200 — 4.7 KiB — 32 ms — h3https://static-global.iololi.com/wp-content/themes/Origami/js/mouse.jsstatic-global.iololi.com/wp-content... https://static-global.iololi.com/wp-content/themes/Origami/js/mouse.js — 200 — 2.1 KiB — 145 ms — h3https://static-global.iololi.com/wp-content/themes/Origami/js/main.jsstatic-global.iololi.com/wp-content... https://static-global.iololi.com/wp-content/themes/Origami/js/main.js — 200 — 19.5 KiB — 447 ms — h3https://www.iololi.com/wp-content/uploads/2026/07/cropped-favicon-32x32.webp/wp-content/uploads/2026/07/cropped... https://www.iololi.com/wp-content/uploads/2026/07/cropped-favicon-32x32.webp — 200 — 560 B — 160 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
47% of JavaScript execution is third-party
First-party Third-party 658ms · 2KB · ¥32/mo
static-global.iololi.com
Other
Costly
Execution 658ms
Transfer 2 KB
Monthly Cost ¥32/mo

These scripts may cost more than they're worth

  • static-global.iololi.com adds 658ms and costs ~¥32/month

47% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

static-global.iololi.com takes 658ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

Image Optimization
3 images, 32 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

3

Total Size

32 KB

2 missing alt text 3 missing dimensions 2 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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