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Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
5
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
51
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

3.91 s

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

3.91 s

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

2.04 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.

3.91 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.

16.24 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
16
7 PASS 2 REVIEW 5 FIX
D
Page Weight Budget
Action
2.4 MB transferred, 83 requests
FIX
2.4 MB transferred, 83 requests
Info::
Page weighs 7.3 MB (2.4 MB transferred)
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
83 HTTP requests
Info::
Estimated 0.50 g CO2 per page load
2.4 MB / 2.4 MB budget
2.4 MB transferred
83 requests
0.50 g CO2 per page load
JavaScript 1.3 MiB 55%
Images 690.0 KiB 28%
Fonts 137.9 KiB 6%
Other 107.0 KiB 4%
HTML 98.1 KiB 4%
CSS 42.1 KiB 2%
Other 8.4 KiB 0%
Other 3.1 KiB 0%
Other 552 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

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 (2.4 MiB of 2.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5305ms total JS execution
FIX
5305ms total JS execution
Warning::
https://bxp-content-static.prod.public.atl-paas.ne...: 1810ms CPU time
Warning::
https://trello.com/: 797ms CPU time
Warning::
Unattributable: 658ms CPU time
Warning::
https://bxp-content-static.prod.public.atl-paas.ne...: 599ms CPU time
Warning::
https://atl-global.atlassian.com/js/2.313.0/xid/at...: 343ms CPU time
Warning::
Third-party scripts: 5305ms (100% of total)

Main Thread Breakdown

Script Evaluation 58% Other 16% Style & Layout 13% Script Parsing & Compilation 6% Garbage Collection 3%
ScriptTotalScriptingParse/CompileParty
https://bxp-content-static.prod.public.atl-paas.net/js/vendors.b0b83a2116ee27958c23.min.js1810ms1662ms12ms3rd
https://trello.com/797ms43ms1ms3rd
Unattributable658ms43ms0ms3rd
https://bxp-content-static.prod.public.atl-paas.net/js/UiListCarousel.99ed7793f6d67ac442b5.min.js599ms551ms4ms3rd
https://atl-global.atlassian.com/js/2.313.0/xid/atl-xid.js343ms1ms15ms3rd
https://bxp-content-static.prod.public.atl-paas.net/js/main.6bf254a1eb35d2372aa5.min.js335ms315ms10ms3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js305ms151ms82ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PJ8M5SK197ms153ms43ms3rd
https://atl-global.atlassian.com/js/atl-global.min.js108ms89ms7ms3rd
https://bxp-content-static.prod.public.atl-paas.net/js/UiHeaderNav.72558e1bf02d3433476c.min.js102ms2ms6ms3rd

Showing top 10 of 11 scripts

F
JS Bundles
Action
49 scripts, 624 KB unused
FIX
49 scripts, 624 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PJ8...: 86 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 624 KB
624 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB179 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB179 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB179 KB (49%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PJ8M5SK158 KB86 KB (55%)✓3rd
https://bxp-content-static.prod.public.atl-paas.net/js/UiListCarousel.99ed7793f6d67ac442b5.min.js10 KB—✓3rd
https://bxp-content-static.prod.public.atl-paas.net/js/UiModal.d470cf3ef13268d7b64e.min.js3 KB—✓3rd
https://bxp-content-static.prod.public.atl-paas.net/js/8288.6779b452f0cfa870566d.min.js6 KB—✓3rd
https://bxp-content-static.prod.public.atl-paas.net/js/9029.9c2216f19b459086802a.min.js4 KB—✓3rd
https://bxp-content-static.prod.public.atl-paas.net/js/UiHeaderNav.72558e1bf02d3433476c.min.js11 KB—✓3rd
https://bxp-content-static.prod.public.atl-paas.net/js/UiNavLink.a7da7a9e7d78949e1fd0.min.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

F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

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

B
Image Optimization
7 images, 0 KB saveable
REVIEW
7 images, 0 KB saveable
Info::
All images are well-optimized
7 images 690 KB
0 oversized -0 KB
5 legacy format
0 missing dimensions CLS risk
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
5 fonts (138 KB)
PASS
5 fonts (138 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

138 KB total

Render-blocking

0

of 5

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 FCP 3.9 s LCP 3.9 shttps://assets.ctfassets.net/rz1oowkt5gyp/41EruTPEOU9hcBwH94UVuZ/73ac40404d750278b451bf2adf186b1b/Charlie_Text-Regular.woff2Charlie_Text-Regular.woff2 https://assets.ctfassets.net/rz1oowkt5gyp/41EruTPEOU9hcBwH94UVuZ/73ac40404d750278b451bf2adf186b1b/Charlie_Text-Regular.woff2 — 25.3 KiB — 0 ms — font-display: swaphttps://assets.ctfassets.net/rz1oowkt5gyp/2d4nxzJwX8hfIqUN71D4OD/5e2c0c2a3677d935e91dd46635d5149d/Charlie_Text-Semibold.woff2Charlie_Text-Semibold.w... https://assets.ctfassets.net/rz1oowkt5gyp/2d4nxzJwX8hfIqUN71D4OD/5e2c0c2a3677d935e91dd46635d5149d/Charlie_Text-Semibold.woff2 — 25.6 KiB — 0 ms — font-display: swaphttps://assets.ctfassets.net/rz1oowkt5gyp/3KRSiun937K2pXBPYiUwgB/17f578e7699c12924de360e09c018c7c/Charlie_Display-Semibold.woff2Charlie_Display-Semibol... https://assets.ctfassets.net/rz1oowkt5gyp/3KRSiun937K2pXBPYiUwgB/17f578e7699c12924de360e09c018c7c/Charlie_Display-Semibold.woff2 — 26.0 KiB — 0 ms — font-display: swaphttps://assets.ctfassets.net/rz1oowkt5gyp/55uCHq9XzIzIG8yO7WRqfM/b62779fff17f06743e490f6d98a2001a/Charlie_Display-Bold.woff2Charlie_Display-Bold.woff2 https://assets.ctfassets.net/rz1oowkt5gyp/55uCHq9XzIzIG8yO7WRqfM/b62779fff17f06743e490f6d98a2001a/Charlie_Display-Bold.woff2 — 27.2 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 0 ms — font-display: swap
Charlie_Text-Regular.woff2 woff2 swap
Size 25 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Charlie_Text-Semibold.w... woff2 swap
Size 26 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Charlie_Display-Semibol... woff2 swap
Size 26 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Charlie_Display-Bold.woff2 woff2 swap
Size 27 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
33 hints, 0 missing preconnects
PASS
33 hints, 0 missing preconnects
Info::
Page uses 33 resource hint(s)

Current Resource Hints

preconnect
—
preload
+23
33
dns-prefetch
—
prefetch
—

33 resource hints configured

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
83 requests over 0ms
INFO

Performance analysis not available for this result.

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 5305ms · 364KB · $70/mo
bxp-content-static.prod.public.atl-paas.net
Other
Costly
Execution 1810ms
Transfer 44 KB
Monthly Cost $24/mo
trello.com
Other
Costly
Execution 797ms
Transfer 64 KB
Monthly Cost $11/mo
Unattributable
Other
Costly
Execution 658ms
Transfer 0 KB
Monthly Cost $9/mo
bxp-content-static.prod.public.atl-paas.net
Other
Costly
Execution 599ms
Transfer 10 KB
Monthly Cost $8/mo
atl-global.atlassian.com
Other
Costly
Execution 343ms
Transfer 14 KB
Monthly Cost $5/mo
bxp-content-static.prod.public.atl-paas.net
Other
Costly
Execution 335ms
Transfer 15 KB
Monthly Cost $4/mo
www.gstatic.com
Other
Costly
Execution 305ms
Transfer 0 KB
Unused 49%
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Optional
Execution 197ms
Transfer 158 KB
Unused 55%
Monthly Cost $3/mo
atl-global.atlassian.com
Other
Optional
Execution 108ms
Transfer 16 KB
Monthly Cost $1/mo
bxp-content-static.prod.public.atl-paas.net
Other
Optional
Execution 102ms
Transfer 11 KB
Monthly Cost $1/mo
atl-onetrust-wrapper.atlassian.com
Other
Optional
Execution 53ms
Transfer 32 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • bxp-content-static.prod.public.atl-paas.net adds 1810ms and costs ~$24/month
  • trello.com adds 797ms and costs ~$11/month
  • Unattributable adds 658ms and costs ~$9/month
  • bxp-content-static.prod.public.atl-paas.net adds 599ms and costs ~$8/month
  • atl-global.atlassian.com adds 343ms and costs ~$5/month
  • bxp-content-static.prod.public.atl-paas.net adds 335ms and costs ~$4/month
  • www.gstatic.com adds 305ms and costs ~$4/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

bxp-content-static.prod.public.atl-paas.net takes 1810ms 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

trello.com takes 797ms 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 658ms 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

bxp-content-static.prod.public.atl-paas.net takes 599ms 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

atl-global.atlassian.com takes 343ms 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

bxp-content-static.prod.public.atl-paas.net takes 335ms 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.gstatic.com takes 305ms 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

55% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

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

Source: web.dev

How third-party costs are calculated

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

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