Skip to content
https://ustream.tv

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
5
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
64
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.
54
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.

2.39 s

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

3.32 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.

0.006

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

4.19 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.

3.32 s

Page Load Progression

2.1 s
4.3 s
6.4 s
8.5 s
10.7 s
12.8 s
14.9 s
17.0 s
Checks
15
6 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
11.8 MB transferred, 47 requests
FIX
11.8 MB transferred, 47 requests
Critical::
Page weighs 13.6 MB (11.8 MB transferred)
Info::
CSS is 1.1 MB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 1.1 MB
Warning::
JavaScript is 872 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 872 KB
Info::
Fonts are 434 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 434 KB
Info::
47 HTTP requests
Info::
Estimated 2.5 g CO2 per page load
11.8 MB / 2.4 MB budget
11.8 MB transferred
47 requests
2.5 g CO2 per page load
Other 9.0 MiB 76%
CSS 1.1 MiB 10%
JavaScript 872.0 KiB 7%
Fonts 434.1 KiB 4%
Images 380.2 KiB 3%
Other 5.8 KiB 0%
HTML 4.9 KiB 0%
Other 1.9 KiB 0%
0 2.4 MB 4.9 MB
Over budget

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

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 (11.8 MiB of 11.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
18 scripts, 456 KB unused
FIX
18 scripts, 456 KB unused
Warning::
https://ustvstaticcdn2-a.akamaihd.net/packed/webpa...: 126 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ustvstaticcdn2-a.akamaihd.net/packed/webpa...: 112 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ustvstaticcdn2-a.akamaihd.net/packed/webpa...: 82 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://tags.tiqcdn.com/utag/ibm/web/prod/utag.js: 47 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://1.www.s81c.com/common/stats/ibm-common.js: 34 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 456 KB
456 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/react:17750371421.js203 KB126 KB (63%)✓3rd
https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/dashboard_organization_select:17750371421.js156 KB112 KB (72%)✓3rd
https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/home:17750371421.js170 KB82 KB (48%)✓3rd
https://tags.tiqcdn.com/utag/ibm/web/prod/utag.js90 KB47 KB (53%)✓3rd
https://1.www.s81c.com/common/stats/ibm-common.js83 KB34 KB (42%)✓3rd
https://www.ibm.com/common/dc/0f2de1d5b89a/fd2dbb0e058e/launch-d91723c9d1ad.min.js81 KB31 KB (39%)✓3rd
https://consent.trustarc.com/asset/notice.js/v/v1.7-172936 KB23 KB (64%)✓3rd
blob:https://video.ibm.com/b5d0cace-08bc-44f0-aba8-1c64ca084cd9-0 KB—✓3rd
https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/keepalive_app:17750371421.js3 KB—✓3rd
https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/5786-cb95904dc2ce49f10033.js3 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
47 resources · 11.8 MB · 456 KB savings available
FIX
47 resources · 11.8 MB · 456 KB savings available
Warning::
Page weight 10.8 MB over 1MB target
Got: 11.8 MB Expected: ≤ 1 MB
Info::
~456 KB of savings available
Warning::
46 third-party resources (100% of weight)
Info::
3 resources over 200KB
47 resources · 11.8 MiB · 46 third-party 10.8 MiB over 1MB target
Media 76% · 9.0 MiB
CSS 10% · 1.1 MiB
JavaScript 7% · 872.0 KiB
Font 4% · 434.1 KiB
Image 3% · 386.9 KiB
Document 0% · 4.9 KiB
Other 0% · 1.1 KiB

~456.4 KiB of savings available

Remove unused JavaScript: 456.4 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.

B
JS Execution Cost
581ms total JS execution
REVIEW
581ms total JS execution
Info::
https://1.www.s81c.com/common/stats/ibm-common.js: 220ms CPU time
Info::
Unattributable: 216ms CPU time
Info::
https://video.ibm.com/: 144ms CPU time
Warning::
Third-party scripts: 581ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Other 30% Style & Layout 13% Script Parsing & Compilation 4% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://1.www.s81c.com/common/stats/ibm-common.js220ms188ms7ms3rd
Unattributable216ms1ms0ms3rd
https://video.ibm.com/144ms0ms1ms3rd
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
Image Optimization
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 380 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
9 fonts (434 KB)
PASS
9 fonts (434 KB)
Info::
9 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

9

434 KB total

Render-blocking

0

of 9

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 FCP 2.4 s LCP 3.3 shttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Light.woff2IBMPlexSans-Light.woff2 https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Light.woff2 — 65.1 KiB — 72 ms — font-display: swaphttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Regular.woff2IBMPlexSans-Regular.woff2 https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Regular.woff2 — 61.9 KiB — 70 ms — font-display: swaphttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-SemiBold.woff2IBMPlexSans-SemiBold.woff2 https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-SemiBold.woff2 — 65.8 KiB — 96 ms — font-display: swaphttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin1.woff2IBMPlexSans-Regular-Lat... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin1.woff2 — 20.8 KiB — 72 ms — font-display: swaphttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Light-Latin1.woff2IBMPlexSans-Light-Latin... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Light-Latin1.woff2 — 22.0 KiB — 74 ms — font-display: swaphttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-SemiBold-Latin1.woff2IBMPlexSans-SemiBold-La... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-SemiBold-Latin1.woff2 — 22.0 KiB — 76 ms — font-display: swaphttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Cyrillic.woff2IBMPlexSans-Regular-Cyr... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Cyrillic.woff2 — 19.9 KiB — 78 ms — font-display: swaphttps://consent.trustarc.com/get?name=IBM_PlexSans-SemiBold.ttfget https://consent.trustarc.com/get?name=IBM_PlexSans-SemiBold.ttf — 80.5 KiB — 11 ms — font-display: swaphttps://consent.trustarc.com/get?name=IBM_PlexSans-Regular.ttfget https://consent.trustarc.com/get?name=IBM_PlexSans-Regular.ttf — 76.1 KiB — 11 ms — font-display: swap
IBMPlexSans-Light.woff2 woff2 swap
Size 65 KB
Load time 72 ms
Start 804 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Regular.woff2 woff2 swap
Size 62 KB
Load time 70 ms
Start 804 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-SemiBold.woff2 woff2 swap
Size 66 KB
Load time 96 ms
Start 804 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Regular-Lat... woff2 swap
Size 21 KB
Load time 72 ms
Start 2.2 s
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Light-Latin... woff2 swap
Size 22 KB
Load time 74 ms
Start 2.2 s
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-SemiBold-La... woff2 swap
Size 22 KB
Load time 76 ms
Start 2.2 s
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Regular-Cyr... woff2 swap
Size 20 KB
Load time 78 ms
Start 2.2 s
Risk FOUT — text flashes from fallback to web font
get ttf swap
Size 80 KB
Load time 11 ms
Start 2.7 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
get ttf swap
Size 76 KB
Load time 11 ms
Start 2.7 s
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)

Fixing the unchecked items could save ~47 KB and ~94 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
47 requests over 9805ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 2.4 s LCP 3.3 shttps://ustream.tv// https://ustream.tv/ — 301 — 43 B — 265 ms — h2https://www.ustream.tv/www.ustream.tv/ https://www.ustream.tv/ — 308 — 41 B — 88 ms — h2https://video.ibm.com/video.ibm.com/ https://video.ibm.com/ — 200 — 3.5 KiB — 444 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Light.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Light.woff2 — 200 — 65.1 KiB — 72 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Regular.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Regular.woff2 — 200 — 61.9 KiB — 70 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-SemiBold.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-SemiBold.woff2 — 200 — 65.8 KiB — 96 ms — h2https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/carbon:1776802215.cssustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/carbon:1776802215.css — 200 — 900.4 KiB — 1.3 s — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/home:1776802215.cssustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/home:1776802215.css — 200 — 506 B — 585 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/common:1776802215.cssustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/common:1776802215.css — 200 — 21.7 KiB — 757 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/ie11:1776802215.cssustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/ie11:1776802215.css — 200 — 673 B — 681 ms — http/1.1https://1.www.s81c.com/common/stats/ibm-common.js1.www.s81c.com/common/stats/ibm-com... https://1.www.s81c.com/common/stats/ibm-common.js — 200 — 83.0 KiB — 8 ms — h2https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/react:17750372001.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/react:17750372001.js — 200 — 17.5 KiB — 9 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/dashboard_organization_select:17750372001.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/dashboard_organization_select:17750372001.js — 200 — 6.5 KiB — 16 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/home:17750372001.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/home:17750372001.js — 200 — 3.2 KiB — 22 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/react:17750371421.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/react:17750371421.js — 200 — 202.7 KiB — 12 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/keepalive_app:17750371421.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/keepalive_app:17750371421.js — 200 — 3.4 KiB — 4 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/dashboard_organization_select:17750371421.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/dashboard_organization_select:17750371421.js — 200 — 156.3 KiB — 6 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/home:17750371421.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/home:17750371421.js — 200 — 170.0 KiB — 7 ms — http/1.1blob:https://video.ibm.com/b5d0cace-08bc-44f0-aba8-1c64ca084cd9video.ibm.com/b5d0cace-08bc-44f0-ab... blob:https://video.ibm.com/b5d0cace-08bc-44f0-aba8-1c64ca084cd9 — 200 — -1 B — 50 ms — blobhttps://ustvstaticcdn1-a.akamaihd.net/v6/images/home/hero.jpgustvstaticcdn1-a.akamaihd.net/v6/im... https://ustvstaticcdn1-a.akamaihd.net/v6/images/home/hero.jpg — 200 — 186.2 KiB — 83 ms — http/1.1https://ustreamssl-a.akamaihd.net/videos/home.mp4ustreamssl-a.akamaihd.net/videos/ho... https://ustreamssl-a.akamaihd.net/videos/home.mp4 — 206 — 9.0 MiB — 7.7 s — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/5786-cb95904dc2ce49f10033.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/5786-cb95904dc2ce49f10033.js — 200 — 2.9 KiB — 5 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/1f849ec0d7eaa6058096.jpgustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/1f849ec0d7eaa6058096.jpg — 200 — 193.2 KiB — 809 ms — http/1.1https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin1.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin1.woff2 — 200 — 20.8 KiB — 72 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Light-Latin1.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Light-Latin1.woff2 — 200 — 22.0 KiB — 74 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-SemiBold-Latin1.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-SemiBold-Latin1.woff2 — 200 — 22.0 KiB — 76 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Cyrillic.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Cyrillic.woff2 — 200 — 19.9 KiB — 78 ms — h2https://www.ibm.com/common/dc/0f2de1d5b89a/fd2dbb0e058e/launch-d91723c9d1ad.min.jswww.ibm.com/common/dc/0f2de1d5b89a/... https://www.ibm.com/common/dc/0f2de1d5b89a/fd2dbb0e058e/launch-d91723c9d1ad.min.js — 200 — 81.5 KiB — 176 ms — h2https://www-api.ibm.com/data-sync/dbdm-data?callback=_dl.fn.dataSync.callbackwww-api.ibm.com/data-sync/dbdm-data... https://www-api.ibm.com/data-sync/dbdm-data?callback=_dl.fn.dataSync.callback — 200 — 1.1 KiB — 168 ms — http/1.1https://tags.tiqcdn.com/dle/ibm/web/p_1679e42ad32df9d247067251e0f3001a87f13d9bf97eb0d66081251e20e1e3b6.jstags.tiqcdn.com/dle/ibm/web/p_1679e... https://tags.tiqcdn.com/dle/ibm/web/p_1679e42ad32df9d247067251e0f3001a87f13d9bf97eb0d66081251e20e1e3b6.js — 200 — 928 B — 13 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 2.4 s LCP 3.3 shttps://ustream.tv// https://ustream.tv/ — 301 — 43 B — 265 ms — h2https://www.ustream.tv/www.ustream.tv/ https://www.ustream.tv/ — 308 — 41 B — 88 ms — h2https://video.ibm.com/video.ibm.com/ https://video.ibm.com/ — 200 — 3.5 KiB — 444 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Light.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Light.woff2 — 200 — 65.1 KiB — 72 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Regular.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Regular.woff2 — 200 — 61.9 KiB — 70 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-SemiBold.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-SemiBold.woff2 — 200 — 65.8 KiB — 96 ms — h2https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/carbon:1776802215.cssustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/carbon:1776802215.css — 200 — 900.4 KiB — 1.3 s — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/home:1776802215.cssustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/home:1776802215.css — 200 — 506 B — 585 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/common:1776802215.cssustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/common:1776802215.css — 200 — 21.7 KiB — 757 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/ie11:1776802215.cssustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/ie11:1776802215.css — 200 — 673 B — 681 ms — http/1.1https://1.www.s81c.com/common/stats/ibm-common.js1.www.s81c.com/common/stats/ibm-com... https://1.www.s81c.com/common/stats/ibm-common.js — 200 — 83.0 KiB — 8 ms — h2https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/react:17750372001.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/react:17750372001.js — 200 — 17.5 KiB — 9 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/dashboard_organization_select:17750372001.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/dashboard_organization_select:17750372001.js — 200 — 6.5 KiB — 16 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/home:17750372001.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/l10n/fr_fr/webpack/home:17750372001.js — 200 — 3.2 KiB — 22 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/react:17750371421.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/react:17750371421.js — 200 — 202.7 KiB — 12 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/keepalive_app:17750371421.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/keepalive_app:17750371421.js — 200 — 3.4 KiB — 4 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/dashboard_organization_select:17750371421.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/dashboard_organization_select:17750371421.js — 200 — 156.3 KiB — 6 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/home:17750371421.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/home:17750371421.js — 200 — 170.0 KiB — 7 ms — http/1.1blob:https://video.ibm.com/b5d0cace-08bc-44f0-aba8-1c64ca084cd9video.ibm.com/b5d0cace-08bc-44f0-ab... blob:https://video.ibm.com/b5d0cace-08bc-44f0-aba8-1c64ca084cd9 — 200 — -1 B — 50 ms — blobhttps://ustvstaticcdn1-a.akamaihd.net/v6/images/home/hero.jpgustvstaticcdn1-a.akamaihd.net/v6/im... https://ustvstaticcdn1-a.akamaihd.net/v6/images/home/hero.jpg — 200 — 186.2 KiB — 83 ms — http/1.1https://ustreamssl-a.akamaihd.net/videos/home.mp4ustreamssl-a.akamaihd.net/videos/ho... https://ustreamssl-a.akamaihd.net/videos/home.mp4 — 206 — 9.0 MiB — 7.7 s — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/5786-cb95904dc2ce49f10033.jsustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/5786-cb95904dc2ce49f10033.js — 200 — 2.9 KiB — 5 ms — http/1.1https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/1f849ec0d7eaa6058096.jpgustvstaticcdn2-a.akamaihd.net/packe... https://ustvstaticcdn2-a.akamaihd.net/packed/webpack/1f849ec0d7eaa6058096.jpg — 200 — 193.2 KiB — 809 ms — http/1.1https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin1.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin1.woff2 — 200 — 20.8 KiB — 72 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Light-Latin1.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Light-Latin1.woff2 — 200 — 22.0 KiB — 74 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-SemiBold-Latin1.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-SemiBold-Latin1.woff2 — 200 — 22.0 KiB — 76 ms — h2https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Cyrillic.woff21.www.s81c.com/common/carbon/plex/f... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Cyrillic.woff2 — 200 — 19.9 KiB — 78 ms — h2https://www.ibm.com/common/dc/0f2de1d5b89a/fd2dbb0e058e/launch-d91723c9d1ad.min.jswww.ibm.com/common/dc/0f2de1d5b89a/... https://www.ibm.com/common/dc/0f2de1d5b89a/fd2dbb0e058e/launch-d91723c9d1ad.min.js — 200 — 81.5 KiB — 176 ms — h2https://www-api.ibm.com/data-sync/dbdm-data?callback=_dl.fn.dataSync.callbackwww-api.ibm.com/data-sync/dbdm-data... https://www-api.ibm.com/data-sync/dbdm-data?callback=_dl.fn.dataSync.callback — 200 — 1.1 KiB — 168 ms — http/1.1https://tags.tiqcdn.com/dle/ibm/web/p_1679e42ad32df9d247067251e0f3001a87f13d9bf97eb0d66081251e20e1e3b6.jstags.tiqcdn.com/dle/ibm/web/p_1679e... https://tags.tiqcdn.com/dle/ibm/web/p_1679e42ad32df9d247067251e0f3001a87f13d9bf97eb0d66081251e20e1e3b6.js — 200 — 928 B — 13 ms — h2https://tags.tiqcdn.com/utag/ibm/web/prod/utag.jstags.tiqcdn.com/utag/ibm/web/prod/u... https://tags.tiqcdn.com/utag/ibm/web/prod/utag.js — 200 — 89.8 KiB — 6 ms — h2https://consent.trustarc.com/notice?c=teconsent&domain=ibm.com&country=ES&language=fr&privacypolicylink=https%3A%2F%2Fwww.ibm.com%2Fprivacy&js=nj&noticeType=bb&text=true&pcookie&cdn=1&gtm=1consent.trustarc.com/notice?c=tecon... https://consent.trustarc.com/notice?c=teconsent&domain=ibm.com&country=ES&language=fr&privacypolicylink=https%3A%2F%2Fwww.ibm.com%2Fprivacy&js=nj&noticeType=bb&text=true&pcookie&cdn=1&gtm=1 — 200 — 15.8 KiB — 42 ms — h2https://tags.tiqcdn.com/utag/ibm/web/prod/utag.v.js?a=ibm/web/202604201714&cb=1776802217042tags.tiqcdn.com/utag/ibm/web/prod/u... https://tags.tiqcdn.com/utag/ibm/web/prod/utag.v.js?a=ibm/web/202604201714&cb=1776802217042 — 200 — 432 B — 3 ms — h2https://consent.trustarc.com/analytics?action=0&domain=ibm.com&implied=1&session=3f5caea2bd774b2faf982897de624a1e&new=1&referer=https://video.ibm.comconsent.trustarc.com/analytics?acti... https://consent.trustarc.com/analytics?action=0&domain=ibm.com&implied=1&session=3f5caea2bd774b2faf982897de624a1e&new=1&referer=https://video.ibm.com — 200 — 463 B — 45 ms — h2https://consent.trustarc.com/asset/notice.js/v/v1.7-1729consent.trustarc.com/asset/notice.j... https://consent.trustarc.com/asset/notice.js/v/v1.7-1729 — 200 — 36.4 KiB — 11 ms — h2https://consent.trustarc.com/get?name=crossdomain.html&domain=ibm.comconsent.trustarc.com/get?name=cross... https://consent.trustarc.com/get?name=crossdomain.html&domain=ibm.com — 200 — 1.4 KiB — 11 ms — h2https://1.www.s81c.com/common/carbon/plex/sans-hebrew.css?family=IBM+Plex+Sans+Hebrew:wght@400;600&display=swap1.www.s81c.com/common/carbon/plex/s... https://1.www.s81c.com/common/carbon/plex/sans-hebrew.css?family=IBM+Plex+Sans+Hebrew:wght@400;600&display=swap — 200 — 658 B — 4 ms — h2https://1.www.s81c.com/common/carbon/plex/sans-arabic.css?family=IBM+Plex+Sans+Arabic:wght@400;600&display=swap1.www.s81c.com/common/carbon/plex/s... https://1.www.s81c.com/common/carbon/plex/sans-arabic.css?family=IBM+Plex+Sans+Arabic:wght@400;600&display=swap — 200 — 659 B — 12 ms — h2https://1.www.s81c.com/common/carbon/plex/sans-jp.css?family=IBM+Plex+Sans+JP:wght@400;600&display=swap1.www.s81c.com/common/carbon/plex/s... https://1.www.s81c.com/common/carbon/plex/sans-jp.css?family=IBM+Plex+Sans+JP:wght@400;600&display=swap — 200 — 158.8 KiB — 19 ms — h2https://1.www.s81c.com/common/carbon/plex/sans-kr.css?family=IBM+Plex+Sans+KR:wght@400;600&display=swap1.www.s81c.com/common/carbon/plex/s... https://1.www.s81c.com/common/carbon/plex/sans-kr.css?family=IBM+Plex+Sans+KR:wght@400;600&display=swap — 200 — 86.6 KiB — 14 ms — h2https://consent.trustarc.com/analytics?action=1&domain=ibm.com&implied=1&session=3f5caea2bd774b2faf982897de624a1e&new=1&referer=https://video.ibm.comconsent.trustarc.com/analytics?acti... https://consent.trustarc.com/analytics?action=1&domain=ibm.com&implied=1&session=3f5caea2bd774b2faf982897de624a1e&new=1&referer=https://video.ibm.com — 200 — 463 B — 41 ms — h2https://consent.trustarc.com/get?name=ibm_close_icon.svgconsent.trustarc.com/get?name=ibm_c... https://consent.trustarc.com/get?name=ibm_close_icon.svg — 200 — 849 B — 5 ms — h2https://consent.trustarc.com/get?name=IBM_PlexSans-SemiBold.ttfconsent.trustarc.com/get?name=IBM_P... https://consent.trustarc.com/get?name=IBM_PlexSans-SemiBold.ttf — 200 — 80.5 KiB — 11 ms — h2https://consent.trustarc.com/get?name=IBM_PlexSans-Regular.ttfconsent.trustarc.com/get?name=IBM_P... https://consent.trustarc.com/get?name=IBM_PlexSans-Regular.ttf — 200 — 76.1 KiB — 11 ms — h2https://ustvstaticcdn2-a.akamaihd.net/favicon.icoustvstaticcdn2-a.akamaihd.net/favic... https://ustvstaticcdn2-a.akamaihd.net/favicon.ico — 200 — 5.8 KiB — 11 ms — http/1.1https://adobedc.demdex.net/ee/v1/privacy/set-consent?configId=45c0161e-f8dc-4770-8e3b-83e85000dd0b&requestId=1a6a3987-348d-4c5f-8814-21227f7a4784adobedc.demdex.net/ee/v1/privacy/se... https://adobedc.demdex.net/ee/v1/privacy/set-consent?configId=45c0161e-f8dc-4770-8e3b-83e85000dd0b&requestId=1a6a3987-348d-4c5f-8814-21227f7a4784 — 200 — 1.0 KiB — 83 ms — h2https://assets.adobedtm.com/0f2de1d5b89a/fd2dbb0e058e/94861a24ddd7/RCa01675387b8541cbbab70fd358fd43e5-source.min.jsassets.adobedtm.com/0f2de1d5b89a/fd... https://assets.adobedtm.com/0f2de1d5b89a/fd2dbb0e058e/94861a24ddd7/RCa01675387b8541cbbab70fd358fd43e5-source.min.js — 200 — 599 B — 39 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 581ms · 86KB · $8/mo
1.www.s81c.com
Other
Costly
Execution 220ms
Transfer 83 KB
Unused 42%
Monthly Cost $3/mo
Unattributable
Other
Costly
Execution 216ms
Transfer 0 KB
Monthly Cost $3/mo
video.ibm.com
Other
Optional
Execution 144ms
Transfer 3 KB
Monthly Cost $2/mo

These scripts may cost more than they're worth

  • 1.www.s81c.com adds 220ms and costs ~$3/month
  • Unattributable adds 216ms 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

1.www.s81c.com takes 220ms 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 216ms 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

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback