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https://illinois.gov

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
74
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.
77
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.

1.21 s

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

1.89 s

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

274 ms

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

0.011

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

2.04 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.

3.09 s

Page Load Progression

495 ms
990 ms
1.5 s
2.0 s
2.5 s
3.0 s
3.5 s
4.0 s
Checks
15
5 PASS 3 REVIEW 5 FIX
D
Page Weight Budget
Action
2.3 MB transferred, 65 requests
FIX
2.3 MB transferred, 65 requests
Info::
Page weighs 4.7 MB (2.3 MB transferred)
Warning::
Images are 1.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.2 MB
Warning::
JavaScript is 698 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 698 KB
Info::
Fonts are 306 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 306 KB
Info::
65 HTTP requests
Info::
Estimated 0.49 g CO2 per page load
2.3 MB / 2.4 MB budget
2.3 MB transferred
65 requests
0.49 g CO2 per page load
Images 1.2 MiB 52%
JavaScript 698.4 KiB 29%
Fonts 305.9 KiB 13%
CSS 105.2 KiB 4%
HTML 15.7 KiB 1%
Other 6.5 KiB 0%
Other 2.5 KiB 0%
Other 1.6 KiB 0%
0 2.4 MB 4.9 MB
Approaching limit

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

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.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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 (2.3 MiB of 2.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
15 scripts, 428 KB unused
FIX
15 scripts, 428 KB unused
Warning::
https://www.illinois.gov/etc.clientlibs/soi/client...: 241 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://siteimproveanalytics.com/js/siteanalyze_62...: 84 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.adobedtm.com/c318d2739692/7710421a8...: 46 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.weglot.us/weglot.min.js: 34 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.illinois.gov/etc.clientlibs/clientlibs...: 24 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 428 KB
428 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-site.min.ceba2c9b1777d50985335592166ed10d.js321 KB241 KB (75%)✓3rd
https://siteimproveanalytics.com/js/siteanalyze_6284073.js111 KB84 KB (76%)✓3rd
https://assets.adobedtm.com/c318d2739692/7710421a8ac1/launch-eae2ed0f1b30.min.js98 KB46 KB (47%)✓3rd
https://cdn.weglot.us/weglot.min.js71 KB34 KB (48%)✓3rd
https://www.illinois.gov/etc.clientlibs/clientlibs/granite/jquery.min.f9e8e8c279baf6a1a278042afe4f395a.js36 KB24 KB (66%)✓3rd
https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-base.min.86db31df3dd7bfdefe6a299153edd583.js26 KB—✗3rd
https://www.illinois.gov/libs/dam/components/scene7/common/clientlibs/i18n.min.729cff467445a61264e4f0ffb2261059.js2 KB—✓3rd
https://www.illinois.gov/libs/dam/components/scene7/dynamicmedia/clientlibs/dynamicmedia.min.e2b0f51383fb1e3c8201cf865e03b07b.js2 KB—✓3rd
https://www.illinois.gov/etc.clientlibs/clientlibs/granite/utils.min.899004cc02c33efc1f6694b1aee587fd.js3 KB—✓3rd
https://assets.adobedtm.com/extensions/EPbf7b42aa08bc4f10879b1484195e80d1/AppMeasurement.min.js12 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

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

F
Page Weight Inventory
Action
65 resources · 2.3 MB · 428 KB savings available
FIX
65 resources · 2.3 MB · 428 KB savings available
Warning::
Page weight 1.3 MB over 1MB target
Got: 2.3 MB Expected: ≤ 1 MB
Info::
~428 KB of savings available
Warning::
64 third-party resources (100% of weight)
Info::
3 resources over 200KB
65 resources · 2.3 MiB · 64 third-party 1.3 MiB over 1MB target
Image 52% · 1.2 MiB
JavaScript 29% · 699.0 KiB
Font 13% · 305.9 KiB
CSS 4% · 105.2 KiB
Document 1% · 15.8 KiB
Other 0% · 9.1 KiB

~428.0 KiB of savings available

Remove unused JavaScript: 428.0 KiB
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.

C
Image Optimization
Action
25 images, 0 KB saveable
REVIEW
25 images, 0 KB saveable
Warning::
https://s7d1.scene7.com/is/image/isp/services_ides... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s7d1.scene7.com/is/image/isp/services_sos_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s7d1.scene7.com/is/image/isp/services_dceo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s7d1.scene7.com/is/image/isp/services_find... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s7d1.scene7.com/is/image/isp/card2-home-de... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s7d1.scene7.com/is/image/isp/services_idfp... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s7d1.scene7.com/is/image/isp/services_idot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.illinois.gov/content/dam/soi/en/web/il... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.illinois.gov/content/dam/soi/en/web/gl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.illinois.gov/content/dam/soi/en/web/il... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.illinois.gov/content/dam/soi/en/web/il... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
25 images 1.2 MB
0 oversized -0 KB
24 legacy format
11 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

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

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

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

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

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

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

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

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

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

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

B
JS Execution Cost
847ms total JS execution
REVIEW
847ms total JS execution
Warning::
https://www.illinois.gov/libs/dam/components/scene...: 254ms CPU time
Info::
https://www.illinois.gov/etc.clientlibs/soi/client...: 222ms CPU time
Info::
https://www.illinois.gov/: 138ms CPU time
Info::
Unattributable: 124ms CPU time
Info::
https://assets.adobedtm.com/c318d2739692/7710421a8...: 109ms CPU time
Warning::
Third-party scripts: 847ms (100% of total)

Main Thread Breakdown

Script Evaluation 61% Other 15% Style & Layout 9% Script Parsing & Compilation 8% Parse HTML & CSS 3% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://www.illinois.gov/libs/dam/components/scene7/common/clientlibs/i18n.min.729cff467445a61264e4f0ffb2261059.js254ms254ms0ms3rd
https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-site.min.ceba2c9b1777d50985335592166ed10d.js222ms164ms40ms3rd
https://www.illinois.gov/138ms4ms1ms3rd
Unattributable124ms2ms0ms3rd
https://assets.adobedtm.com/c318d2739692/7710421a8ac1/launch-eae2ed0f1b30.min.js109ms91ms12ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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+
Font Loading
2 fonts (306 KB)
PASS
2 fonts (306 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

306 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 FCP 1.2 s LCP 1.9 shttps://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-fontawesome/resources/fonts/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-fontawesome/resources/fonts/webfonts/fa-solid-900.woff2 — 137.1 KiB — 44 ms — font-display: swaphttps://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-fontawesome/resources/fonts/webfonts/fa-regular-400.woff2fa-regular-400.woff2 https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-fontawesome/resources/fonts/webfonts/fa-regular-400.woff2 — 168.8 KiB — 31 ms — font-display: swap
fa-solid-900.woff2 woff2 swap
Size 137 KB
Load time 44 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fa-regular-400.woff2 woff2 swap
Size 169 KB
Load time 31 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
  • 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 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
65 requests over 3890ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.2 s LCP 1.9 shttps://illinois.gov// https://illinois.gov/ — 301 — 132 B — 889 ms — h2https://www.illinois.gov/www.illinois.gov/ https://www.illinois.gov/ — 200 — 12.5 KiB — 266 ms — h2https://assets.adobedtm.com/c318d2739692/7710421a8ac1/launch-eae2ed0f1b30.min.jsassets.adobedtm.com/c318d2739692/77... https://assets.adobedtm.com/c318d2739692/7710421a8ac1/launch-eae2ed0f1b30.min.js — 200 — 97.8 KiB — 85 ms — h2https://www.illinois.gov/etc.clientlibs/soi/components/content/v1/column-control/clientlibs.min.2ab879f828ba72e740aa98f5e369863a.csswww.illinois.gov/etc.clientlibs/soi... https://www.illinois.gov/etc.clientlibs/soi/components/content/v1/column-control/clientlibs.min.2ab879f828ba72e740aa98f5e369863a.css — 200 — 618 B — 20 ms — h2https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-base.min.c3650e3f6e621da09287c84cdbb73bc4.csswww.illinois.gov/etc.clientlibs/soi... https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-base.min.c3650e3f6e621da09287c84cdbb73bc4.css — 200 — 40.1 KiB — 39 ms — h2https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-site.min.700065f4ce2a624061bc703131cef776.csswww.illinois.gov/etc.clientlibs/soi... https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-site.min.700065f4ce2a624061bc703131cef776.css — 200 — 54.6 KiB — 50 ms — h2https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-theme-1.min.370e6718906fc9e7d4960168d7507e83.csswww.illinois.gov/etc.clientlibs/soi... https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-theme-1.min.370e6718906fc9e7d4960168d7507e83.css — 200 — 3.1 KiB — 43 ms — h2https://www.illinois.gov/content/dam/soi/en/web/illinois/resources/css/custom.csswww.illinois.gov/content/dam/soi/en... https://www.illinois.gov/content/dam/soi/en/web/illinois/resources/css/custom.css — 200 — 1.8 KiB — 44 ms — h2https://www.illinois.gov/content/dam/soi/en/web/illinois/images/logos/illinois_gov.pngwww.illinois.gov/content/dam/soi/en... https://www.illinois.gov/content/dam/soi/en/web/illinois/images/logos/illinois_gov.png — 200 — 12.8 KiB — 47 ms — h2https://www.illinois.gov/libs/dam/components/scene7/dynamicmedia/clientlibs/dynamicmedia.min.a97e0418f0d0d6fe2eea57c7dc5e8804.csswww.illinois.gov/libs/dam/component... https://www.illinois.gov/libs/dam/components/scene7/dynamicmedia/clientlibs/dynamicmedia.min.a97e0418f0d0d6fe2eea57c7dc5e8804.css — 200 — 442 B — 48 ms — h2https://www.illinois.gov/www.illinois.gov/ https://www.illinois.gov/ — 200 — 24 B — 22 ms — h3https://www.illinois.gov/libs/dam/components/scene7/common/clientlibs/viewer.min.78cc99cb08222001ca2bdf214cc2727b.jswww.illinois.gov/libs/dam/component... https://www.illinois.gov/libs/dam/components/scene7/common/clientlibs/viewer.min.78cc99cb08222001ca2bdf214cc2727b.js — 200 — 575 B — 80 ms — h3https://www.illinois.gov/etc.clientlibs/clientlibs/granite/jquery.min.f9e8e8c279baf6a1a278042afe4f395a.jswww.illinois.gov/etc.clientlibs/cli... https://www.illinois.gov/etc.clientlibs/clientlibs/granite/jquery.min.f9e8e8c279baf6a1a278042afe4f395a.js — 200 — 35.7 KiB — 59 ms — h3https://www.illinois.gov/etc.clientlibs/clientlibs/granite/utils.min.899004cc02c33efc1f6694b1aee587fd.jswww.illinois.gov/etc.clientlibs/cli... https://www.illinois.gov/etc.clientlibs/clientlibs/granite/utils.min.899004cc02c33efc1f6694b1aee587fd.js — 200 — 3.5 KiB — 53 ms — h3https://www.illinois.gov/libs/dam/components/scene7/dynamicmedia/clientlibs/dynamicmedia.min.e2b0f51383fb1e3c8201cf865e03b07b.jswww.illinois.gov/libs/dam/component... https://www.illinois.gov/libs/dam/components/scene7/dynamicmedia/clientlibs/dynamicmedia.min.e2b0f51383fb1e3c8201cf865e03b07b.js — 200 — 1.7 KiB — 51 ms — h3https://www.illinois.gov/libs/dam/components/scene7/common/clientlibs/i18n.min.729cff467445a61264e4f0ffb2261059.jswww.illinois.gov/libs/dam/component... https://www.illinois.gov/libs/dam/components/scene7/common/clientlibs/i18n.min.729cff467445a61264e4f0ffb2261059.js — 200 — 2.2 KiB — 78 ms — h3https://s7d1.scene7.com/is/image/isp/card2-home-destkop-2x?ts=1626825447224&$TeaserComponent$s7d1.scene7.com/is/image/isp/card2-... https://s7d1.scene7.com/is/image/isp/card2-home-destkop-2x?ts=1626825447224&$TeaserComponent$ — 200 — 41.2 KiB — 65 ms — h2https://www.illinois.gov/content/dam/soi/en/web/global/images/icons/bluesky-white-icon-transparent.pngwww.illinois.gov/content/dam/soi/en... https://www.illinois.gov/content/dam/soi/en/web/global/images/icons/bluesky-white-icon-transparent.png — 200 — 4.8 KiB — 77 ms — h3https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-base.min.86db31df3dd7bfdefe6a299153edd583.jswww.illinois.gov/etc.clientlibs/soi... https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-base.min.86db31df3dd7bfdefe6a299153edd583.js — 200 — 25.6 KiB — 57 ms — h3https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-site.min.ceba2c9b1777d50985335592166ed10d.jswww.illinois.gov/etc.clientlibs/soi... https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-site.min.ceba2c9b1777d50985335592166ed10d.js — 200 — 320.5 KiB — 80 ms — h3https://s7d1.scene7.com/is/image/isp/home-hero-desktop-2x?ts=1626825447214&$ContainerDesktop$&wid=1440&stretchs7d1.scene7.com/is/image/isp/home-h... https://s7d1.scene7.com/is/image/isp/home-hero-desktop-2x?ts=1626825447214&$ContainerDesktop$&wid=1440&stretch — 200 — 220.1 KiB — 63 ms — h2https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-fontawesome/resources/fonts/webfonts/fa-solid-900.woff2www.illinois.gov/etc.clientlibs/soi... https://www.illinois.gov/etc.clientlibs/soi/clientlibs/clientlib-fontawesome/resources/fonts/webfonts/fa-solid-900.woff2 — 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h2https://smetrics.illinois.gov/b/ss/isppublishprod/1/JS-2.23.0-LDQM/s99737257877865?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2021%3A54%3A37%202%200&sdid=2267C585A77DEBF8-7A9085D634F4856F&mid=29069641852304940900319448572146148677&aamlh=3&ce=UTF-8&pageName=illinois%3Ahome&g=https%3A%2F%2Fwww.illinois.gov%2F&c.&apl=4.0&inList=3.0&getPageLoadTime=3.0&ecid.&mid=29069641852304940900319448572146148677&pageDomain=www.illinois.gov&vapiVersion=5.5.0&aamVersion=not%20set&atVersion=at.js%202.10.2&icsmcvid=server%20side%20mid&mcidcto=successful%20response&aamidcto=successful%20response&mcorgid=D%3Dmcorgid&.ecid&.c&h.&architecture=x86&bitness=64&platformVersion=10.15.7&.h&cc=USD&ch=illinois&server=dispatcher2usgovwest1-28580712&events=event1&aamb=j8Odv6LonN4r3an7LhD3WZrU1bUpAkFkkiY1ncBR96t2PTI&c1=www.illinois.gov&v1=www.illinois.gov&c2=https%3A%2F%2Fwww.illinois.gov%2F&v2=https%3A%2F%2Fwww.illinois.gov%2F&v3=Illinois&v4=27.5.0%7Cproduction%7C2023-05-22T19%3A17%3A09Z%7C2023-02-22T20%3A37%3A26Z%7Ctrue&c7=D%3Dmid&v7=D%3Dmid&v10=D%3DpageName&c11=%2F&v11=%2F&c14=illinois&v14=illinois&c15=Desktop&v15=Desktop&c16=prod%7Cpublish&v16=prod%7Cpublish&v17=2026-04-01t18%3A25%3A02z%7C6.5.21.0&c18=anonymous&v18=anonymous&v19=true&v20=04%2F21%2F2026&v21=04%2F16%2F2026&v35=illinois-home-page&s=800x600&c=24&j=1.6&v=N&k=Y&bw=1350&bh=940&mcorgid=36CF020D5D9EE7D70A495ECF%40AdobeOrg&AQE=1smetrics.illinois.gov/b/ss/isppubli... https://smetrics.illinois.gov/b/ss/isppublishprod/1/JS-2.23.0-LDQM/s99737257877865?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2021%3A54%3A37%202%200&sdid=2267C585A77DEBF8-7A9085D634F4856F&mid=29069641852304940900319448572146148677&aamlh=3&ce=UTF-8&pageName=illinois%3Ahome&g=https%3A%2F%2Fwww.illinois.gov%2F&c.&apl=4.0&inList=3.0&getPageLoadTime=3.0&ecid.&mid=29069641852304940900319448572146148677&pageDomain=www.illinois.gov&vapiVersion=5.5.0&aamVersion=not%20set&atVersion=at.js%202.10.2&icsmcvid=server%20side%20mid&mcidcto=successful%20response&aamidcto=successful%20response&mcorgid=D%3Dmcorgid&.ecid&.c&h.&architecture=x86&bitness=64&platformVersion=10.15.7&.h&cc=USD&ch=illinois&server=dispatcher2usgovwest1-28580712&events=event1&aamb=j8Odv6LonN4r3an7LhD3WZrU1bUpAkFkkiY1ncBR96t2PTI&c1=www.illinois.gov&v1=www.illinois.gov&c2=https%3A%2F%2Fwww.illinois.gov%2F&v2=https%3A%2F%2Fwww.illinois.gov%2F&v3=Illinois&v4=27.5.0%7Cproduction%7C2023-05-22T19%3A17%3A09Z%7C2023-02-22T20%3A37%3A26Z%7Ctrue&c7=D%3Dmid&v7=D%3Dmid&v10=D%3DpageName&c11=%2F&v11=%2F&c14=illinois&v14=illinois&c15=Desktop&v15=Desktop&c16=prod%7Cpublish&v16=prod%7Cpublish&v17=2026-04-01t18%3A25%3A02z%7C6.5.21.0&c18=anonymous&v18=anonymous&v19=true&v20=04%2F21%2F2026&v21=04%2F16%2F2026&v35=illinois-home-page&s=800x600&c=24&j=1.6&v=N&k=Y&bw=1350&bh=940&mcorgid=36CF020D5D9EE7D70A495ECF%40AdobeOrg&AQE=1 — 200 — 305 B — 10 ms — h2https://www.youtube.com/iframe_apiwww.youtube.com/iframe_api https://www.youtube.com/iframe_api — 200 — 3.5 KiB — 23 ms — h2https://www.illinois.gov/content/dam/soi/en/web/illinois/images/logos/il-favicon.icowww.illinois.gov/content/dam/soi/en... https://www.illinois.gov/content/dam/soi/en/web/illinois/images/logos/il-favicon.ico — 200 — 689 B — 22 ms — h3https://www.youtube.com/s/player/218d9d92/www-widgetapi.vflset/www-widgetapi.jswww.youtube.com/s/player/218d9d92/w... https://www.youtube.com/s/player/218d9d92/www-widgetapi.vflset/www-widgetapi.js — 200 — 10.6 KiB — 5 ms — h2https://cdn.weglot.us/weglot.min.jscdn.weglot.us/weglot.min.js https://cdn.weglot.us/weglot.min.js — 200 — 71.3 KiB — 34 ms — h2https://cdn.weglot.us/projects-settings/44d6dbf28ab4c6140765b2bab9f70ea86.jsoncdn.weglot.us/projects-settings/44d... https://cdn.weglot.us/projects-settings/44d6dbf28ab4c6140765b2bab9f70ea86.json — 200 — 1.1 KiB — 20 ms — h3https://www.illinois.gov/content/dam/soi/en/web/illinois/iisnewsimages/rollupimages/dol/idollogo.jpgwww.illinois.gov/content/dam/soi/en... https://www.illinois.gov/content/dam/soi/en/web/illinois/iisnewsimages/rollupimages/dol/idollogo.jpg — 200 — 704.6 KiB — 1.0 s — h3https://www.illinois.gov/content/dam/soi/en/web/illinois/iisnewsimages/rollupimages/dor/dorlogosm.gifwww.illinois.gov/content/dam/soi/en... https://www.illinois.gov/content/dam/soi/en/web/illinois/iisnewsimages/rollupimages/dor/dorlogosm.gif — 200 — 5.8 KiB — 493 ms — h3https://www.illinois.gov/content/dam/soi/en/web/illinois/iisnewsimages/rollupimages/dnr/dnrlogo.jpgwww.illinois.gov/content/dam/soi/en... https://www.illinois.gov/content/dam/soi/en/web/illinois/iisnewsimages/rollupimages/dnr/dnrlogo.jpg — 200 — 9.0 KiB — 176 ms — h3https://cdn.weglot.us/weglot.min.css?v=11cdn.weglot.us/weglot.min.css?v=11 https://cdn.weglot.us/weglot.min.css?v=11 — 200 — 4.5 KiB — 11 ms — h2data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ…data:image/svg+xml;base64,PHN2ZyB4b... data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ… — 200 — 0 B — 0 ms — datahttps://cdn.weglot.us/projects-settings/44d6dbf28ab4c6140765b2bab9f70ea86.jsoncdn.weglot.us/projects-settings/44d... https://cdn.weglot.us/projects-settings/44d6dbf28ab4c6140765b2bab9f70ea86.json — 200 — 454 B — 10 ms — h3
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 847ms · 421KB · $11/mo
www.illinois.gov
Other
Costly
Execution 254ms
Transfer 2 KB
Monthly Cost $3/mo
www.illinois.gov
Other
Costly
Execution 222ms
Transfer 321 KB
Unused 75%
Monthly Cost $3/mo
www.illinois.gov
Other
Optional
Execution 138ms
Transfer 0 KB
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 124ms
Transfer 0 KB
Monthly Cost $2/mo
assets.adobedtm.com
Other
Optional
Execution 109ms
Transfer 98 KB
Unused 47%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.illinois.gov adds 254ms and costs ~$3/month
  • www.illinois.gov adds 222ms and costs ~$3/month

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

www.illinois.gov takes 254ms 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

www.illinois.gov takes 222ms 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

75% of www.illinois.gov'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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