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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
44
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
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.

3.82 s

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

5.72 s

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

1.15 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.

5.60 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.

19.84 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
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
2.9 MB transferred, 141 requests
FIX
2.9 MB transferred, 141 requests
Warning::
Page weighs 10.5 MB (2.9 MB transferred)
Warning::
JavaScript is 2.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.1 MB
Info::
CSS is 264 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 264 KB
Info::
Fonts are 242 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 242 KB
Warning::
141 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.60 g CO2 per page load
2.9 MB / 2.4 MB budget
2.9 MB transferred
141 requests
0.60 g CO2 per page load
JavaScript 2.1 MiB 74%
CSS 264.4 KiB 9%
Fonts 242.4 KiB 8%
Images 172.5 KiB 6%
HTML 40.1 KiB 1%
Other 34.1 KiB 1%
Other 3.9 KiB 0%
Other 2.9 KiB 0%
0 2.4 MB 4.9 MB
Over budget

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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

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 (2.9 MiB of 2.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5867ms total JS execution
FIX
5867ms total JS execution
Warning::
https://fast.wistia.com/assets/external/E-v1.js: 1930ms CPU time
Warning::
https://www.ul.com/: 954ms CPU time
Warning::
Unattributable: 789ms CPU time
Warning::
https://www.ul.com/profiles/custom/ul_base_profile...: 751ms CPU time
Warning::
https://acsbapp.com/apps/app/dist/js/app.js: 503ms CPU time
Warning::
Third-party scripts: 5867ms (100% of total)

Main Thread Breakdown

Script Evaluation 57% Other 18% Style & Layout 11% Script Parsing & Compilation 8%
ScriptTotalScriptingParse/CompileParty
https://fast.wistia.com/assets/external/E-v1.js1930ms1595ms72ms3rd
https://www.ul.com/954ms42ms2ms3rd
Unattributable789ms71ms0ms3rd
https://www.ul.com/profiles/custom/ul_base_profile/themes/custom/ul_base_theme/build/scripts/app.built.js?v=10.6.2751ms551ms189ms3rd
https://acsbapp.com/apps/app/dist/js/app.js503ms374ms87ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PBJ84RQ293ms246ms43ms3rd
https://fast.wistia.com/assets/external/engines/hls_video.js@379dc59f3883ecbd8a4ec99277538cfd8c619ee8288ms210ms2ms3rd
https://www.ul.com/profiles/custom/ul_base_profile/themes/custom/ul_base_theme/libraries/jquery-3.7.1.min.js?v=3.7.1166ms132ms8ms3rd
https://www.ul.com/modules/custom/ul_material3/lib/beer-custom/beer.min.js?tdab90139ms124ms0ms3rd
https://consent.trustarc.com/notice?domain=ulsolutionsweb.com&c=teconsent&js=nj&noticeType=bb&text=true&gtm=155ms44ms3ms3rd
D
JS Bundles
Action
96 scripts, 446 KB unused
FIX
96 scripts, 446 KB unused
Warning::
https://fast.wistia.com/assets/external/engines/hl...: 122 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://acsbapp.com/apps/app/dist/js/app.js: 114 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PBJ...: 81 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://fast.wistia.com/assets/external/E-v1.js: 64 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.trustarc.com/asset/notice.js/v/v1....: 22 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 446 KB
446 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://fast.wistia.com/assets/external/engines/hls_video.js@379dc59f3883ecbd8a4ec99277538cfd8c619ee8159 KB122 KB (77%)✓3rd
https://acsbapp.com/apps/app/dist/js/app.js222 KB114 KB (53%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PBJ84RQ186 KB81 KB (44%)✓3rd
https://fast.wistia.com/assets/external/E-v1.js162 KB64 KB (44%)✓3rd
https://consent.trustarc.com/asset/notice.js/v/v1.7-172936 KB22 KB (60%)✓3rd
https://browser.sentry-cdn.com/9.6.1/bundle.min.js25 KB21 KB (86%)✓3rd
https://static.addtoany.com/menu/modules/core.ydpp7jcu.js26 KB21 KB (82%)✓3rd
https://www.ul.com/core/misc/announce.js?v=10.6.22 KB—✓3rd
https://www.ul.com/core/assets/vendor/jquery.ui/ui/widgets/resizable-min.js?v=10.6.27 KB—✓3rd
https://www.ul.com/core/misc/drupal.js?v=10.6.27 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
141 resources · 2.9 MB · 446 KB savings available
FIX
141 resources · 2.9 MB · 446 KB savings available
Warning::
Page weight 1.9 MB over 1MB target
Got: 2.9 MB Expected: ≤ 1 MB
Info::
~446 KB of savings available
Warning::
140 third-party resources (100% of weight)
Info::
3 resources over 200KB
141 resources · 2.9 MiB · 140 third-party 1.9 MiB over 1MB target
JavaScript 74% · 2.1 MiB
CSS 9% · 264.4 KiB
Font 8% · 242.4 KiB
Image 6% · 177.0 KiB
Document 1% · 42.0 KiB
Other 1% · 34.4 KiB

~446.0 KiB of savings available

Remove unused JavaScript: 446.0 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
14 images, 0 KB saveable
REVIEW
14 images, 0 KB saveable
Warning::
https://consent.trustarc.com/get?name=white_close_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ul.com/themes/custom/ul-com-theme/img/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
14 images 172 KB
0 oversized -0 KB
5 legacy format
2 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

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
7 fonts (242 KB)
PASS
7 fonts (242 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

242 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.8 s LCP 5.7 shttps://www.ul.com/profiles/custom/ul_enterprise_profile/themes/custom/ul_enterprise_theme/build/fonts/Poppins/Poppins-Regular.woff2Poppins-Regular.woff2 https://www.ul.com/profiles/custom/ul_enterprise_profile/themes/custom/ul_enterprise_theme/build/fonts/Poppins/Poppins-Regular.woff2 — 50.3 KiB — 6 ms — font-display: swaphttps://www.ul.com/profiles/custom/ul_enterprise_profile/themes/custom/ul_enterprise_theme/build/fonts/icomoon/icomoon.woff2icomoon.woff2 https://www.ul.com/profiles/custom/ul_enterprise_profile/themes/custom/ul_enterprise_theme/build/fonts/icomoon/icomoon.woff2 — 9.8 KiB — 7 ms — font-display: swaphttps://www.ul.com/profiles/custom/ul_enterprise_profile/themes/custom/ul_enterprise_theme/build/fonts/Poppins/Poppins-SemiBold.woff2Poppins-SemiBold.woff2 https://www.ul.com/profiles/custom/ul_enterprise_profile/themes/custom/ul_enterprise_theme/build/fonts/Poppins/Poppins-SemiBold.woff2 — 50.2 KiB — 17 ms — font-display: swaphttps://www.ul.com/profiles/custom/ul_enterprise_profile/themes/custom/ul_enterprise_theme/build/fonts/Poppins/Poppins-Light.woff2Poppins-Light.woff2 https://www.ul.com/profiles/custom/ul_enterprise_profile/themes/custom/ul_enterprise_theme/build/fonts/Poppins/Poppins-Light.woff2 — 50.1 KiB — 16 ms — font-display: swaphttps://www.ul.com/profiles/custom/ul_base_profile/themes/custom/ul_base_theme/build/fonts/Poppins/Poppins-Regular.woff2Poppins-Regular.woff2 https://www.ul.com/profiles/custom/ul_base_profile/themes/custom/ul_base_theme/build/fonts/Poppins/Poppins-Regular.woff2 — 50.3 KiB — 8 ms — font-display: swaphttps://www.ul.com/profiles/custom/ul_enterprise_profile/themes/custom/ul_enterprise_theme/build/fonts/OpenSans/OpenSans-Regular.woff2OpenSans-Regular.woff2 https://www.ul.com/profiles/custom/ul_enterprise_profile/themes/custom/ul_enterprise_theme/build/fonts/OpenSans/OpenSans-Regular.woff2 — 30.2 KiB — 6 ms — font-display: swapdata:application/x-font-woff;charset=utf-8;base64,d09GMk9UVE8AAAaMAAwAAAAACgAAAAZBAAMD1wAAAAAAAAAAA…x-font-woff;charset=utf... data:application/x-font-woff;charset=utf-8;base64,d09GMk9UVE8AAAaMAAwAAAAACgAAAAZBAAMD1wAAAAAAAAAAA… — 1.6 KiB — 16 ms — font-display: swap
Poppins-Regular.woff2 woff2 swap
Size 50 KB
Load time 6 ms
Start 240 ms
Risk FOUT — text flashes from fallback to web font
icomoon.woff2 woff2 swap
Size 10 KB
Load time 7 ms
Start 240 ms
Risk FOUT — text flashes from fallback to web font
Poppins-SemiBold.woff2 woff2 swap
Size 50 KB
Load time 17 ms
Start 326 ms
Risk FOUT — text flashes from fallback to web font
Poppins-Light.woff2 woff2 swap
Size 50 KB
Load time 16 ms
Start 326 ms
Risk FOUT — text flashes from fallback to web font
Poppins-Regular.woff2 woff2 swap
Size 50 KB
Load time 8 ms
Start 363 ms
Risk FOUT — text flashes from fallback to web font
OpenSans-Regular.woff2 woff2 swap
Size 30 KB
Load time 6 ms
Start 412 ms
Risk FOUT — text flashes from fallback to web font
x-font-woff;charset=utf... woff swap
Size 2 KB
Load time 16 ms
Start 908 ms
Risk FOUT — text flashes from fallback to web font
  • 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)
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
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
Network Waterfall
141 requests over 6536ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.8 s LCP 5.7 shttps://ul.com// https://ul.com/ — 301 — 203 B — 11 ms — h2https://www.ul.com/www.ul.com/ https://www.ul.com/ — 200 — 38.3 KiB — 13 ms — h2https://www.ul.com/sites/default/files/css/css_OKXzcFlaXFE_Wx84xPYnCST6VH9LZzy3_vBLFoyT7v8.css?delta=0&language=en&theme=ul_com_theme&include=eJxtUFGWgyAMvBDCxx7IFzEqbQBfEtq6p19Q-9rd7Q8kM5PJAIyjZkibg7OwE-ekxhOIbG4AwWcdUQRmFOMzoxu5rEAWLvA4gJQ5AoVvNPhQCun6lJytiTgGcFMgRbYeVg05mRUYZoZ1kaf8hdiS1jJQkAVHI1PvF1A3Ux6AjGQfgPrds2_24qaaG-4oOaL1Oa45YX3IB-F_yOqCEY1sohiPRxfq293vzLv3H-bI04luhNIRa-Pr-pMu1NXmpBtVMyGvHD4ZhDQ3SQS-omb3Kg-0DtbcX3uYrhrHPCKDdjeo-ED4W1VIOl9Ec2y4QN0_ZfYt0ltnGbVw2r-h6ZTrCLB3b7W9SOUHcwt4F7eftu4uhD-aX-Cywww.ul.com/sites/default/files/css/... https://www.ul.com/sites/default/files/css/css_OKXzcFlaXFE_Wx84xPYnCST6VH9LZzy3_vBLFoyT7v8.css?delta=0&language=en&theme=ul_com_theme&include=eJxtUFGWgyAMvBDCxx7IFzEqbQBfEtq6p19Q-9rd7Q8kM5PJAIyjZkibg7OwE-ekxhOIbG4AwWcdUQRmFOMzoxu5rEAWLvA4gJQ5AoVvNPhQCun6lJytiTgGcFMgRbYeVg05mRUYZoZ1kaf8hdiS1jJQkAVHI1PvF1A3Ux6AjGQfgPrds2_24qaaG-4oOaL1Oa45YX3IB-F_yOqCEY1sohiPRxfq293vzLv3H-bI04luhNIRa-Pr-pMu1NXmpBtVMyGvHD4ZhDQ3SQS-omb3Kg-0DtbcX3uYrhrHPCKDdjeo-ED4W1VIOl9Ec2y4QN0_ZfYt0ltnGbVw2r-h6ZTrCLB3b7W9SOUHcwt4F7eftu4uhD-aX-Cy — 200 — 12.2 KiB — 46 ms — h2https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.6.0/css/all.min.csscdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.6.0/css/all.min.css — 200 — 18.9 KiB — 105 ms — h3https://www.ul.com/sites/default/files/css/css__Kfp3sTJ3xE_QtdC275n6UkaIH8QO11ydFFYj7J4bKk.css?delta=2&language=en&theme=ul_com_theme&include=eJxtUFGWgyAMvBDCxx7IFzEqbQBfEtq6p19Q-9rd7Q8kM5PJAIyjZkibg7OwE-ekxhOIbG4AwWcdUQRmFOMzoxu5rEAWLvA4gJQ5AoVvNPhQCun6lJytiTgGcFMgRbYeVg05mRUYZoZ1kaf8hdiS1jJQkAVHI1PvF1A3Ux6AjGQfgPrds2_24qaaG-4oOaL1Oa45YX3IB-F_yOqCEY1sohiPRxfq293vzLv3H-bI04luhNIRa-Pr-pMu1NXmpBtVMyGvHD4ZhDQ3SQS-omb3Kg-0DtbcX3uYrhrHPCKDdjeo-ED4W1VIOl9Ec2y4QN0_ZfYt0ltnGbVw2r-h6ZTrCLB3b7W9SOUHcwt4F7eftu4uhD-aX-Cywww.ul.com/sites/default/files/css/... https://www.ul.com/sites/default/files/css/css__Kfp3sTJ3xE_QtdC275n6UkaIH8QO11ydFFYj7J4bKk.css?delta=2&language=en&theme=ul_com_theme&include=eJxtUFGWgyAMvBDCxx7IFzEqbQBfEtq6p19Q-9rd7Q8kM5PJAIyjZkibg7OwE-ekxhOIbG4AwWcdUQRmFOMzoxu5rEAWLvA4gJQ5AoVvNPhQCun6lJytiTgGcFMgRbYeVg05mRUYZoZ1kaf8hdiS1jJQkAVHI1PvF1A3Ux6AjGQfgPrds2_24qaaG-4oOaL1Oa45YX3IB-F_yOqCEY1sohiPRxfq293vzLv3H-bI04luhNIRa-Pr-pMu1NXmpBtVMyGvHD4ZhDQ3SQS-omb3Kg-0DtbcX3uYrhrHPCKDdjeo-ED4W1VIOl9Ec2y4QN0_ZfYt0ltnGbVw2r-h6ZTrCLB3b7W9SOUHcwt4F7eftu4uhD-aX-Cy — 200 — 28.7 KiB — 51 ms — h2https://www.ul.com/sites/default/files/css/css_4PArO1oMAKRxeqUi1TfcT3MD3Ia48CNTpI8e1VQ26po.css?delta=3&language=en&theme=ul_com_theme&include=eJxtUFGWgyAMvBDCxx7IFzEqbQBfEtq6p19Q-9rd7Q8kM5PJAIyjZkibg7OwE-ekxhOIbG4AwWcdUQRmFOMzoxu5rEAWLvA4gJQ5AoVvNPhQCun6lJytiTgGcFMgRbYeVg05mRUYZoZ1kaf8hdiS1jJQkAVHI1PvF1A3Ux6AjGQfgPrds2_24qaaG-4oOaL1Oa45YX3IB-F_yOqCEY1sohiPRxfq293vzLv3H-bI04luhNIRa-Pr-pMu1NXmpBtVMyGvHD4ZhDQ3SQS-omb3Kg-0DtbcX3uYrhrHPCKDdjeo-ED4W1VIOl9Ec2y4QN0_ZfYt0ltnGbVw2r-h6ZTrCLB3b7W9SOUHcwt4F7eftu4uhD-aX-Cywww.ul.com/sites/default/files/css/... 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https://fast.wistia.com/assets/external/engines/hls_video.js@379dc59f3883ecbd8a4ec99277538cfd8c619ee8 — 200 — 158.9 KiB — 11 ms — h2https://www.ul.com/themes/custom/ul-com-theme/favicon.icowww.ul.com/themes/custom/ul-com-the... https://www.ul.com/themes/custom/ul-com-theme/favicon.ico — 200 — 3.7 KiB — 11 ms — h2https://fast.wistia.com/assets/images/blank.giffast.wistia.com/assets/images/blank... https://fast.wistia.com/assets/images/blank.gif — 200 — 1.4 KiB — 2 ms — h2https://fast.wistia.com/embed/medias/1hlg5eyj20.m3u8fast.wistia.com/embed/medias/1hlg5e... https://fast.wistia.com/embed/medias/1hlg5eyj20.m3u8 — 200 — 2.0 KiB — 2 ms — h2https://distillery.wistia.com/xdistillery.wistia.com/x https://distillery.wistia.com/x — 204 — 293 B — 174 ms — h2https://pipedream.wistia.com/mput?topic=metricspipedream.wistia.com/mput?topic=met... https://pipedream.wistia.com/mput?topic=metrics — 200 — 333 B — 148 ms — h2https://pipedream.wistia.com/mput?topic=metricspipedream.wistia.com/mput?topic=met... https://pipedream.wistia.com/mput?topic=metrics — 200 — 332 B — 109 ms — h2https://fast.wistia.com/assets/external/allIntegrations.js@379dc59f3883ecbd8a4ec99277538cfd8c619ee8fast.wistia.com/assets/external/all... https://fast.wistia.com/assets/external/allIntegrations.js@379dc59f3883ecbd8a4ec99277538cfd8c619ee8 — 200 — 16.1 KiB — 3 ms — h2https://pipedream.wistia.com/mput?topic=metricspipedream.wistia.com/mput?topic=met... https://pipedream.wistia.com/mput?topic=metrics — 500 — 357 B — 626 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/js/bootstrap.min.js?_=1776813585575ulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/js/bootstrap.min.js?_=1776813585575 — 200 — 26.4 KiB — 599 ms — h2https://acsbapp.com/apps/app/dist/js/app.jsacsbapp.com/apps/app/dist/js/app.js https://acsbapp.com/apps/app/dist/js/app.js — 200 — 222.1 KiB — 149 ms — h2https://cdn.acsbapp.com/config/ul.com/config.jsoncdn.acsbapp.com/config/ul.com/confi... https://cdn.acsbapp.com/config/ul.com/config.json — 200 — 724 B — 197 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/styles/bootstrap.min.cssulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/styles/bootstrap.min.css — 200 — 2.7 KiB — 182 ms — h2https://ulenterpriseorg.my.salesforce-scrt.com/embeddedservice/v1/embedded-service-config?orgId=00D4x00000676e4&esConfigName=UL_Digital_Assistant_Embedded_Service&language=en_USulenterpriseorg.my.salesforce-scrt.... https://ulenterpriseorg.my.salesforce-scrt.com/embeddedservice/v1/embedded-service-config?orgId=00D4x00000676e4&esConfigName=UL_Digital_Assistant_Embedded_Service&language=en_US — 200 — 23.5 KiB — 465 ms — h2https://ulenterpriseorg.my.salesforce-scrt.com/embeddedservice/v1/businesshours?orgId=00D4x00000676e4&esConfigName=UL_Digital_Assistant_Embedded_Serviceulenterpriseorg.my.salesforce-scrt.... https://ulenterpriseorg.my.salesforce-scrt.com/embeddedservice/v1/businesshours?orgId=00D4x00000676e4&esConfigName=UL_Digital_Assistant_Embedded_Service — 204 — 240 B — 366 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/htdocs/sitecontext.min.html?parent_domain=https%3A%2F%2Fwww.ul.comulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/htdocs/sitecontext.min.html?parent_domain=https%3A%2F%2Fwww.ul.com — 200 — 907 B — 200 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/js/sitecontext.min.jsulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/js/sitecontext.min.js — 200 — 1.6 KiB — 194 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/?lwc.mode=prod&lwr.linkHeaders=trueulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/?lwc.mode=prod&lwr.linkHeaders=true — 200 — 1.8 KiB — 201 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/js/inert.min.jsulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/js/inert.min.js — 200 — 2.7 KiB — 173 ms — h2https://www.ul.com/themes/custom/ul-com-theme/img/chat/chat_icon.pngwww.ul.com/themes/custom/ul-com-the... https://www.ul.com/themes/custom/ul-com-theme/img/chat/chat_icon.png — 200 — 5.4 KiB — 4 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/framework/f005680334/prod/lwr_loaderulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/framework/f005680334/prod/lwr_loader — 200 — 8.4 KiB — 24 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/framework/45dbd95ddc/prod/lwr_bootstrapulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/framework/45dbd95ddc/prod/lwr_bootstrap — 200 — 27.5 KiB — 27 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/framework/9f4b4f0eed/prod/lwr_app_bootstrap_hookulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/framework/9f4b4f0eed/prod/lwr_app_bootstrap_hook — 200 — 4.7 KiB — 26 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/framework/b8d68ec341/prod/lwr_lwculenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/framework/b8d68ec341/prod/lwr_lwc — 200 — 29.6 KiB — 35 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/framework/32066829d2/prod/lwr_appulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/framework/32066829d2/prod/lwr_app — 200 — 76.9 KiB — 32 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/view/82436c2591336865a887377d22b80e38/prod/en-US/home_viewulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/view/82436c2591336865a887377d22b80e38/prod/en-US/home_view — 200 — 382.9 KiB — 48 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/component/259a789b5905e4a3e65c0942cc97421d/prod/en-US/force/luvioLwcBindings_cmpulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/component/259a789b5905e4a3e65c0942cc97421d/prod/en-US/force/luvioLwcBindings_cmp — 200 — 2.0 KiB — 40 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/component/da6467b90bc1eda0c5728f07f2d9928c/prod/en-US/force/luvioRuntimeWebruntime_cmpulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/component/da6467b90bc1eda0c5728f07f2d9928c/prod/en-US/force/luvioRuntimeWebruntime_cmp — 200 — 5.7 KiB — 40 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/view/c6e487cb3b0822273066fb86ded6b10c/prod/en-US/frame_viewulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/webruntime/view/c6e487cb3b0822273066fb86ded6b10c/prod/en-US/frame_view — 200 — 16.5 KiB — 42 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/styles/embedded-messaging-styling.min.css?a48afabbfbulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/styles/embedded-messaging-styling.min.css?a48afabbfb — 200 — 687 B — 170 ms — h2https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/styles/salesforce-lightning-design-system.min.css?a48afabbfbulenterpriseorg.my.site.com/ESWULDi... https://ulenterpriseorg.my.site.com/ESWULDigitalAssistantE1715867975271/assets/styles/salesforce-lightning-design-system.min.css?a48afabbfb — 200 — 102.0 KiB — 196 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 5867ms · 1327KB · €102/mo
fast.wistia.com
Other
Costly
Execution 1930ms
Transfer 162 KB
Unused 44%
Monthly Cost €34/mo
www.ul.com
Other
Costly
Execution 954ms
Transfer 38 KB
Monthly Cost €17/mo
Unattributable
Other
Costly
Execution 789ms
Transfer 0 KB
Monthly Cost €14/mo
www.ul.com
Other
Costly
Execution 751ms
Transfer 508 KB
Monthly Cost €13/mo
acsbapp.com
Other
Costly
Execution 503ms
Transfer 222 KB
Unused 53%
Monthly Cost €9/mo
Google Tag Manager
Tag Manager
Costly
Execution 293ms
Transfer 186 KB
Unused 44%
Monthly Cost €5/mo
fast.wistia.com
Other
Costly
Execution 288ms
Transfer 159 KB
Unused 77%
Monthly Cost €5/mo
www.ul.com
Other
Optional
Execution 166ms
Transfer 35 KB
Monthly Cost €3/mo
www.ul.com
Other
Optional
Execution 139ms
Transfer 4 KB
Monthly Cost €2/mo
consent.trustarc.com
Other
Optional
Execution 55ms
Transfer 13 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • fast.wistia.com adds 1930ms and costs ~€34/month
  • www.ul.com adds 954ms and costs ~€17/month
  • Unattributable adds 789ms and costs ~€14/month
  • www.ul.com adds 751ms and costs ~€13/month
  • acsbapp.com adds 503ms and costs ~€9/month
  • Google Tag Manager adds 293ms and costs ~€5/month
  • fast.wistia.com adds 288ms and costs ~€5/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

fast.wistia.com takes 1930ms 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.ul.com takes 954ms 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

Unattributable takes 789ms 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.ul.com takes 751ms 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

acsbapp.com takes 503ms 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

53% of acsbapp.com'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

Google Tag Manager takes 293ms 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

fast.wistia.com takes 288ms 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

77% of fast.wistia.com'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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