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https://ca.gov

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
2
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
84
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

1.18 s

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

2.06 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

33 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.059

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

1.93 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.

2.06 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
15
7 PASS 4 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (717.7 KiB of 717.8 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
11 images, 0 KB saveable
REVIEW
11 images, 0 KB saveable
Warning::
https://www.ca.gov/images/main-banner.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
11 images 104 KB
0 oversized -0 KB
4 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Bundles
Action
6 scripts, 218 KB unused
REVIEW
6 scripts, 218 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-TM1X...: 66 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PZG...: 64 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-69TD...: 64 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.ca.gov/js/cagov-custom.min.js?vjan26a: 24 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 218 KB
218 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-TM1XPW93HF&cx=c&gtm=4e64f0153 KB66 KB (43%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PZGPNNV124 KB64 KB (52%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-69TD0KNT0F&cx=c&gtm=4e64f0146 KB64 KB (44%)✓3rd
https://www.ca.gov/js/cagov-custom.min.js?vjan26a32 KB24 KB (77%)✓3rd
https://www.ca.gov/js/custom.min.js?vjan26a4 KB—✓3rd
https://alert.cdt.ca.gov/0 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

B
Page Weight Inventory
26 resources · 718 KB · 218 KB savings available
REVIEW
26 resources · 718 KB · 218 KB savings available
Info::
Within 1MB page-weight target
Got: 718 KB
Info::
~218 KB of savings available
Warning::
25 third-party resources (100% of weight)
26 resources · 717.8 KiB · 25 third-party Within 1MB page-weight target
JavaScript 64% · 459.7 KiB
Font 16% · 112.9 KiB
Image 16% · 112.7 KiB
CSS 3% · 24.6 KiB
Document 1% · 7.3 KiB
Other 0% · 594 B

~217.8 KiB of savings available

Remove unused JavaScript: 217.8 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Page Weight Budget
718 KB transferred, 26 requests
PASS
718 KB transferred, 26 requests
Info::
Page weighs 1.7 MB (718 KB transferred)
Info::
26 HTTP requests
Info::
Estimated 0.15 g CO2 per page load
718 KB / 2.4 MB budget
718 KB transferred
26 requests
0.15 g CO2 per page load
JavaScript 459.7 KiB 64%
Fonts 112.9 KiB 16%
Images 104.1 KiB 15%
CSS 24.6 KiB 3%
Other 8.7 KiB 1%
HTML 7.2 KiB 1%
Other 594 B 0%
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+
JS Execution Cost
362ms total JS execution
PASS
362ms total JS execution
Info::
https://www.ca.gov/: 92ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-TM1X...: 78ms CPU time
Info::
Unattributable: 74ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-69TD...: 63ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-PZG...: 55ms CPU time
Warning::
Third-party scripts: 362ms (100% of total)

Main Thread Breakdown

Script Evaluation 47% Other 18% Style & Layout 15% Script Parsing & Compilation 13% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://www.ca.gov/92ms3ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-TM1XPW93HF&cx=c&gtm=4e64f078ms61ms16ms3rd
Unattributable74ms21ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-69TD0KNT0F&cx=c&gtm=4e64f063ms41ms18ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PZGPNNV55ms42ms12ms3rd
A+
Font Loading
2 fonts (113 KB)
PASS
2 fonts (113 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

113 KB total

Render-blocking

0

of 2

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 FCP 1.2 s LCP 2.1 shttps://fonts.gstatic.com/s/publicsans/v18/ijwRs572Xtc6ZYQws9YVwnNGfJ7QwOk1.woff2ijwRs572Xtc6ZYQws9YVwnN... https://fonts.gstatic.com/s/publicsans/v18/ijwRs572Xtc6ZYQws9YVwnNGfJ7QwOk1.woff2 — 26.0 KiB — 17 ms — font-display: swaphttps://www.ca.gov/fonts/CaGov.woff2CaGov.woff2 https://www.ca.gov/fonts/CaGov.woff2 — 86.8 KiB — 528 ms — font-display: swap
ijwRs572Xtc6ZYQws9YVwnN... woff2 swap
Size 26 KB
Load time 17 ms
Start 764 ms
Risk FOUT — text flashes from fallback to web font
CaGov.woff2 woff2 swap
Size 87 KB
Load time 528 ms
Start 764 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+
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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
26 requests over 2934ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.2 s LCP 2.1 shttps://ca.gov// https://ca.gov/ — 301 — 146 B — 19 ms — h2https://www.ca.gov/www.ca.gov/ https://www.ca.gov/ — 200 — 7.2 KiB — 734 ms — h2https://fonts.gstatic.com/s/publicsans/v18/ijwRs572Xtc6ZYQws9YVwnNGfJ7QwOk1.woff2fonts.gstatic.com/s/publicsans/v18/... https://fonts.gstatic.com/s/publicsans/v18/ijwRs572Xtc6ZYQws9YVwnNGfJ7QwOk1.woff2 — 200 — 26.0 KiB — 17 ms — h3https://www.ca.gov/fonts/CaGov.woff2www.ca.gov/fonts/CaGov.woff2 https://www.ca.gov/fonts/CaGov.woff2 — 200 — 86.8 KiB — 528 ms — h2https://www.ca.gov/css/cagov-custom.min.css?vjan26awww.ca.gov/css/cagov-custom.min.css... https://www.ca.gov/css/cagov-custom.min.css?vjan26a — 200 — 24.6 KiB — 1.1 s — h2https://www.ca.gov/js/custom.min.js?vjan26awww.ca.gov/js/custom.min.js?vjan26a https://www.ca.gov/js/custom.min.js?vjan26a — 200 — 4.2 KiB — 911 ms — h2https://www.ca.gov/images/CAgov-logo.svg?v7F3Awww.ca.gov/images/CAgov-logo.svg?v7... https://www.ca.gov/images/CAgov-logo.svg?v7F3A — 200 — 1.8 KiB — 708 ms — h2https://www.ca.gov/js/cagov-custom.min.js?vjan26awww.ca.gov/js/cagov-custom.min.js?v... https://www.ca.gov/js/cagov-custom.min.js?vjan26a — 200 — 31.6 KiB — 446 ms — h2https://alert.cdt.ca.gov/alert.cdt.ca.gov/ https://alert.cdt.ca.gov/ — 200 — 289 B — 43 ms — h2data:image/svg+xml,<svg version="1.1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 498"><po…www.w3.org/2000/svg" viewBox="0 0 1... data:image/svg+xml,<svg version="1.1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 498"><po… — 200 — 0 B — 0 ms — datahttps://www.ca.gov/images/background-lines.svg?vAF3Gwww.ca.gov/images/background-lines.... https://www.ca.gov/images/background-lines.svg?vAF3G — 200 — 8.2 KiB — 178 ms — h2https://www.ca.gov/images/main-banner.svgwww.ca.gov/images/main-banner.svg https://www.ca.gov/images/main-banner.svg — 200 — 26.9 KiB — 232 ms — h2https://www.ca.gov/images/highlight-1.webpwww.ca.gov/images/highlight-1.webp https://www.ca.gov/images/highlight-1.webp — 200 — 9.8 KiB — 181 ms — h2https://www.ca.gov/images/highlight-2.webpwww.ca.gov/images/highlight-2.webp https://www.ca.gov/images/highlight-2.webp — 200 — 15.9 KiB — 887 ms — h2https://www.ca.gov/images/highlight-3.webpwww.ca.gov/images/highlight-3.webp https://www.ca.gov/images/highlight-3.webp — 200 — 23.8 KiB — 850 ms — h2https://www.ca.gov/images/ca-for-all-logo.webpwww.ca.gov/images/ca-for-all-logo.w... https://www.ca.gov/images/ca-for-all-logo.webp — 200 — 5.1 KiB — 901 ms — h2https://www.ca.gov/images/ca-state-seal.webpwww.ca.gov/images/ca-state-seal.web... https://www.ca.gov/images/ca-state-seal.webp — 200 — 5.1 KiB — 706 ms — h2https://www.ca.gov/images/ca-gov-seal.webpwww.ca.gov/images/ca-gov-seal.webp https://www.ca.gov/images/ca-gov-seal.webp — 200 — 5.8 KiB — 958 ms — h2https://www.ca.gov/images/cagov-logo-flag-gradient.svg?v7F3Awww.ca.gov/images/cagov-logo-flag-g... https://www.ca.gov/images/cagov-logo-flag-gradient.svg?v7F3A — 200 — 1.7 KiB — 719 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-PZGPNNVwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-PZGPNNV — 200 — 124.1 KiB — 29 ms — h2https://www.googletagmanager.com/gtag/js?id=G-TM1XPW93HF&cx=c&gtm=4e64f0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-TM1XPW93HF&cx=c&gtm=4e64f0 — 200 — 153.1 KiB — 37 ms — h2https://www.googletagmanager.com/gtag/js?id=G-69TD0KNT0F&cx=c&gtm=4e64f0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-69TD0KNT0F&cx=c&gtm=4e64f0 — 200 — 146.5 KiB — 20 ms — h2https://www.google-analytics.com/g/collect?v=2&tid=G-69TD0KNT0F&gtm=45je64f0v886148400z8830688936za20gzb830688936zd830688936&_p=1776361586092&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=16399294.1776361586&frm=0&pscdl=noapi&rcb=15&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266401~117512543&sid=1776361586&sct=1&seg=0&dl=https%3A%2F%2Fwww.ca.gov%2F&dt=California%20State%20Portal%20%7C%20CA.gov&_tu=QA&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=2244www.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-69TD0KNT0F&gtm=45je64f0v886148400z8830688936za20gzb830688936zd830688936&_p=1776361586092&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=16399294.1776361586&frm=0&pscdl=noapi&rcb=15&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266401~117512543&sid=1776361586&sct=1&seg=0&dl=https%3A%2F%2Fwww.ca.gov%2F&dt=California%20State%20Portal%20%7C%20CA.gov&_tu=QA&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=2244 — 204 — 546 B — 102 ms — h2https://www.google-analytics.com/g/collect?v=2&tid=G-TM1XPW93HF&gtm=45je64f0v889680573z8830688936za20gzb830688936zd830688936&_p=1776361586092&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=16399294.1776361586&frm=0&pscdl=noapi&rcb=16&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266401~117512543&sid=1776361586&sct=1&seg=0&dl=https%3A%2F%2Fwww.ca.gov%2F&dt=California%20State%20Portal%20%7C%20CA.gov&_tu=QA&en=page_view&_fv=1&_ss=1&tfd=2324www.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-TM1XPW93HF&gtm=45je64f0v889680573z8830688936za20gzb830688936zd830688936&_p=1776361586092&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=16399294.1776361586&frm=0&pscdl=noapi&rcb=16&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266401~117512543&sid=1776361586&sct=1&seg=0&dl=https%3A%2F%2Fwww.ca.gov%2F&dt=California%20State%20Portal%20%7C%20CA.gov&_tu=QA&en=page_view&_fv=1&_ss=1&tfd=2324 — 204 — 48 B — 29 ms — h2https://www.ca.gov/favicon.icowww.ca.gov/favicon.ico https://www.ca.gov/favicon.ico — 200 — 4.5 KiB — 230 ms — h2https://www.ca.gov/images/apple-touch-icon-57x57.pngwww.ca.gov/images/apple-touch-icon-... https://www.ca.gov/images/apple-touch-icon-57x57.png — 200 — 4.1 KiB — 179 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 362ms · 431KB · $5/mo
www.ca.gov
Other
Optional
Execution 92ms
Transfer 7 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 78ms
Transfer 153 KB
Unused 43%
Monthly Cost $1/mo
Unattributable
Other
Optional
Execution 74ms
Transfer 0 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 63ms
Transfer 146 KB
Unused 44%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 55ms
Transfer 124 KB
Unused 52%
Monthly Cost $1/mo

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

52% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

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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