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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
2
PASS
5
INFO
2

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

Mobile Desktop
54
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.
88
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.

1.60 s

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

2.89 s

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

422 ms

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

0.034

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

2.73 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.

6.86 s

Page Load Progression

498 ms
996 ms
1.5 s
2.0 s
2.5 s
3.0 s
3.5 s
4.0 s
Checks
14
5 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
11.6 MB transferred, 96 requests
FIX
11.6 MB transferred, 96 requests
Critical::
Page weighs 21.4 MB (11.6 MB transferred)
Warning::
JavaScript is 4.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 4.1 MB
Info::
Fonts are 288 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 288 KB
Info::
96 HTTP requests
Info::
Estimated 2.4 g CO2 per page load
11.6 MB / 2.4 MB budget
11.6 MB transferred
96 requests
2.4 g CO2 per page load
Other 6.0 MiB 52%
JavaScript 4.1 MiB 36%
Images 913.4 KiB 8%
Fonts 288.3 KiB 2%
HTML 247.6 KiB 2%
CSS 57.8 KiB 0%
Other 6.7 KiB 0%
Other 3.8 KiB 0%
Other 850 B 0%
Other 0 B 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

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 (11.6 MiB of 11.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2592ms total JS execution
FIX
2592ms total JS execution
Warning::
https://wac-web.prod-east.frontend.public.atl-paas...: 1477ms CPU time
Warning::
Unattributable: 553ms CPU time
Warning::
https://www.atlassian.com/software/jira?referer=ji...: 386ms CPU time
Info::
https://js.intercomcdn.com/vendor-modern.df860bed....: 107ms CPU time
Info::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 68ms CPU time
Warning::
Third-party scripts: 2592ms (100% of total)

Main Thread Breakdown

Script Evaluation 56% Other 24% Style & Layout 11% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://wac-web.prod-east.frontend.public.atl-paas.net/assets/404.4c46bcc6.js1477ms1282ms7ms3rd
Unattributable553ms16ms0ms3rd
https://www.atlassian.com/software/jira?referer=jira.com386ms17ms13ms3rd
https://js.intercomcdn.com/vendor-modern.df860bed.js107ms92ms15ms3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js68ms42ms22ms3rd
F
JS Bundles
Action
41 scripts, 2.4 MB unused
FIX
41 scripts, 2.4 MB unused
Warning::
https://wac-web.prod-east.frontend.public.atl-paas...: 1.3 MB unused (59%)
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.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js.intercomcdn.com/frame-modern.c43524e8.j...: 137 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 2.4 MB
2409 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://wac-web.prod-east.frontend.public.atl-paas.net/assets/404.4c46bcc6.js2286 KB1349 KB (59%)✓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.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB179 KB (49%)✓3rd
https://js.intercomcdn.com/frame-modern.c43524e8.js192 KB137 KB (72%)✓3rd
https://wac-web.prod-east.frontend.public.atl-paas.net/assets/index.145c3306.js183 KB101 KB (56%)✓3rd
https://js.intercomcdn.com/vendor-modern.df860bed.js144 KB91 KB (64%)✓3rd
https://wac-web.prod-east.frontend.public.atl-paas.net/assets/animation-illustration.a9145d1a.js80 KB66 KB (87%)✓3rd
https://wac-web.prod-east.frontend.public.atl-paas.net/assets/confluence-software-anchor-lp-automation.c69a8aec.js96 KB56 KB (61%)✓3rd
https://wac-web.prod-east.frontend.public.atl-paas.net/assets/jira-software-page.441bdc5f.js65 KB45 KB (73%)✓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
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
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
https://dam-cdn.atl.orangelogic.com/AssetLink/e6lp... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dam-cdn.atl.orangelogic.com/AssetLink/yv50... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dam-cdn.atl.orangelogic.com/AssetLink/m58y... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dam-cdn.atl.orangelogic.com/AssetLink/8en0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dam-cdn.atl.orangelogic.com/AssetLink/bjl4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dam-cdn.atl.orangelogic.com/AssetLink/06yw... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dam-cdn.atl.orangelogic.com/AssetLink/a754... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dam-cdn.atl.orangelogic.com/AssetLink/2v6f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dam-cdn.atl.orangelogic.com/AssetLink/cwp6... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dam-cdn.atl.orangelogic.com/AssetLink/53vs... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24 images 913 KB
0 oversized -0 KB
19 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

Performance issues directly impact user engagement and conversion rates.

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

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
9 fonts (288 KB)
PASS
9 fonts (288 KB)
Info::
9 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

9

288 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 1.6 s LCP 2.9 shttps://ds-cdn.prod-east.frontend.public.atl-paas.net/assets/fonts/atlassian-sans/v4/AtlassianSans-latin.woff2AtlassianSans-latin.woff2 https://ds-cdn.prod-east.frontend.public.atl-paas.net/assets/fonts/atlassian-sans/v4/AtlassianSans-latin.woff2 — 71.9 KiB — 0 ms — font-display: swaphttps://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/2QtjA2B9aCIa8HvyZcNWqL/886e02c2b15732bc62dc9550078d991c/Charlie_Display-Black.woff2Charlie_Display-Black.w... https://assets.ctfassets.net/rz1oowkt5gyp/2QtjA2B9aCIa8HvyZcNWqL/886e02c2b15732bc62dc9550078d991c/Charlie_Display-Black.woff2 — 27.6 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 — 27.1 KiB — 0 ms — font-display: swaphttps://assets.ctfassets.net/rz1oowkt5gyp/6nq3flI8NfgICrz3jZjLyD/81918253d594b7bb77eb898a468d4328/Charlie_Display-Regular.woff2Charlie_Display-Regular... https://assets.ctfassets.net/rz1oowkt5gyp/6nq3flI8NfgICrz3jZjLyD/81918253d594b7bb77eb898a468d4328/Charlie_Display-Regular.woff2 — 24.7 KiB — 0 ms — font-display: swaphttps://assets.ctfassets.net/rz1oowkt5gyp/6fvn66mVrRz4Yw3gQoPaJJ/458e6a69f0036d1e566e028fcbc26a50/Charlie_Text-Bold.woff2Charlie_Text-Bold.woff2 https://assets.ctfassets.net/rz1oowkt5gyp/6fvn66mVrRz4Yw3gQoPaJJ/458e6a69f0036d1e566e028fcbc26a50/Charlie_Text-Bold.woff2 — 26.2 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://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
AtlassianSans-latin.woff2 woff2 swap
Size 72 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
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-Black.w... woff2 swap
Size 28 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
Charlie_Display-Regular... woff2 swap
Size 25 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Charlie_Text-Bold.woff2 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
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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
96 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 2592ms · 2643KB · €45/mo
wac-web.prod-east.frontend.public.atl-paas.net
Other
Costly
Execution 1477ms
Transfer 2286 KB
Unused 59%
Monthly Cost €26/mo
Unattributable
Other
Costly
Execution 553ms
Transfer 0 KB
Monthly Cost €10/mo
www.atlassian.com
Other
Costly
Execution 386ms
Transfer 213 KB
Monthly Cost €7/mo
js.intercomcdn.com
Other
Optional
Execution 107ms
Transfer 144 KB
Unused 64%
Monthly Cost €2/mo
www.gstatic.com
Other
Optional
Execution 68ms
Transfer 0 KB
Unused 49%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • wac-web.prod-east.frontend.public.atl-paas.net adds 1477ms and costs ~€26/month
  • Unattributable adds 553ms and costs ~€10/month
  • www.atlassian.com adds 386ms and costs ~€7/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

wac-web.prod-east.frontend.public.atl-paas.net takes 1477ms 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

59% of wac-web.prod-east.frontend.public.atl-paas.net'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

Unattributable takes 553ms 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.atlassian.com takes 386ms 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

64% of js.intercomcdn.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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