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.
4.09 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.14 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.73 s
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.
6.92 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.
12.16 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction4621ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.illinois.gov/libs/dam/components/scene7/common/clientlibs/i18n.min.729cff467445a61264e4f0ffb2261059.js | 1928ms | 1926ms | 2ms | 3rd |
| https://assets.adobedtm.com/c318d2739692/7710421a8ac1/launch-eae2ed0f1b30.min.js | 689ms | 602ms | 49ms | 3rd |
| https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-site.min.ceba2c9b1777d50985335592166ed10d.js | 650ms | 444ms | 159ms | 3rd |
| https://www.illinois.gov/ | 527ms | 27ms | 5ms | 3rd |
| Unattributable | 322ms | 8ms | 0ms | 3rd |
| https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-base.min.86db31df3dd7bfdefe6a299153edd583.js | 160ms | 112ms | 17ms | 3rd |
| https://cdn.weglot.us/weglot.min.js | 147ms | 117ms | 29ms | 3rd |
| https://siteimproveanalytics.com/js/siteanalyze_6284073.js | 126ms | 65ms | 60ms | 3rd |
| https://www.illinois.gov/etc.clientlibs/clientlibs/granite/jquery.min.f9e8e8c279baf6a1a278042afe4f395a.js | 73ms | 55ms | 13ms | 3rd |
DJS BundlesAction15 scripts, 428 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-site.min.ceba2c9b1777d50985335592166ed10d.js | 321 KB | 241 KB (75%) | ✓ | 3rd |
| https://siteimproveanalytics.com/js/siteanalyze_6284073.js | 111 KB | 84 KB (76%) | ✓ | 3rd |
| https://assets.adobedtm.com/c318d2739692/7710421a8ac1/launch-eae2ed0f1b30.min.js | 98 KB | 45 KB (46%) | ✓ | 3rd |
| https://cdn.weglot.us/weglot.min.js | 71 KB | 34 KB (48%) | ✓ | 3rd |
| https://www.illinois.gov/etc.clientlibs/clientlibs/granite/jquery.min.f9e8e8c279baf6a1a278042afe4f395a.js | 36 KB | 24 KB (66%) | ✓ | 3rd |
| https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-base.min.86db31df3dd7bfdefe6a299153edd583.js | 26 KB | — | ✗ | 3rd |
| https://www.illinois.gov/libs/dam/components/scene7/common/clientlibs/i18n.min.729cff467445a61264e4f0ffb2261059.js | 3 KB | — | ✓ | 3rd |
| https://www.illinois.gov/libs/dam/components/scene7/dynamicmedia/clientlibs/dynamicmedia.min.e2b0f51383fb1e3c8201cf865e03b07b.js | 2 KB | — | ✓ | 3rd |
| https://assets.adobedtm.com/extensions/EPbf7b42aa08bc4f10879b1484195e80d1/AppMeasurement.min.js | 12 KB | — | ✓ | 3rd |
| https://assets.adobedtm.com/extensions/EPbf7b42aa08bc4f10879b1484195e80d1/AppMeasurement_Module_ActivityMap.min.js | 2 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 InventoryAction58 resources · 1.4 MB · 428 KB savings availableFIX
~427.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 58 resources | 1.4 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.4 MB transferred, 58 requestsREVIEW
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
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
CImage OptimizationAction19 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
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
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (306 KB)PASS
Web fonts
2
306 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~153 KB and ~306 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints6 hints, 0 missing preconnectsPASS
Current Resource Hints
6 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall58 requests over 5266msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.illinois.gov www.illinois.gov | Other | 1928ms | 3 KB | — | $26/mo | Costly |
assets.adobedtm.com assets.adobedtm.com | Other | 689ms | 98 KB | 46% | $9/mo | Costly |
www.illinois.gov www.illinois.gov | Other | 650ms | 321 KB | 75% | $9/mo | Costly |
www.illinois.gov www.illinois.gov | Other | 527ms | 1 KB | — | $7/mo | Costly |
Unattributable Unattributable | Other | 322ms | 0 KB | — | $4/mo | Costly |
www.illinois.gov www.illinois.gov | Other | 160ms | 26 KB | — | $2/mo | Optional |
cdn.weglot.us cdn.weglot.us | Other | 147ms | 71 KB | 48% | $2/mo | Optional |
siteimproveanalytics.com siteimproveanalytics.com | Other | 126ms | 111 KB | 76% | $2/mo | Optional |
www.illinois.gov www.illinois.gov | Other | 73ms | 36 KB | 66% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.illinois.gov adds 1928ms and costs ~$26/month
- assets.adobedtm.com adds 689ms and costs ~$9/month
- www.illinois.gov adds 650ms and costs ~$9/month
- www.illinois.gov adds 527ms and costs ~$7/month
- Unattributable adds 322ms and costs ~$4/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
www.illinois.gov takes 1928ms 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
assets.adobedtm.com takes 689ms 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
www.illinois.gov takes 650ms 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
75% of www.illinois.gov'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
www.illinois.gov takes 527ms 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
Unattributable takes 322ms 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
76% of siteimproveanalytics.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
66% of www.illinois.gov'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