Skip to content
https://www.asana.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
1
PASS
6
INFO
2

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

Mobile Desktop
45
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
80
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.
92
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.

981 ms

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

5.26 s

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

561 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.

3.21 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.

5.29 s

Page Load Progression

507 ms
1.0 s
1.5 s
2.0 s
2.5 s
3.0 s
3.6 s
4.1 s
Checks
14
6 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
6.9 MB transferred, 192 requests
FIX
6.9 MB transferred, 192 requests
Critical::
Page weighs 12.7 MB (6.9 MB transferred)
Warning::
JavaScript is 2.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.2 MB
Warning::
192 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.5 g CO2 per page load
6.9 MB / 2.4 MB budget
6.9 MB transferred
192 requests
1.5 g CO2 per page load
Other 3.7 MiB 53%
JavaScript 2.2 MiB 32%
Images 625.1 KiB 9%
Fonts 179.1 KiB 3%
HTML 85.3 KiB 1%
CSS 80.3 KiB 1%
Other 41.9 KiB 1%
Other 22.2 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

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 (6.9 MiB of 6.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5384ms total JS execution
FIX
5384ms total JS execution
Warning::
https://asana.com/_next/static/chunks/framework-e5...: 2037ms CPU time
Warning::
https://asana.com/_next/static/chunks/10012.c5300d...: 1237ms CPU time
Warning::
Unattributable: 483ms CPU time
Warning::
https://fast.wistia.net/assets/external/engines/hl...: 432ms CPU time
Warning::
https://fast.wistia.com/assets/external/publicApi....: 399ms CPU time
Warning::
Third-party scripts: 5384ms (100% of total)

Main Thread Breakdown

Script Evaluation 54% Other 24% Style & Layout 14% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://asana.com/_next/static/chunks/framework-e5fb0dd7fe072789.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b733639643532626337353335303032303030386262386366372037ms1329ms5ms3rd
https://asana.com/_next/static/chunks/10012.c5300d4af375cd99.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b733639643532626337353335303032303030386262386366371237ms526ms0ms3rd
Unattributable483ms31ms0ms3rd
https://fast.wistia.net/assets/external/engines/hls_video.js@0.1.7432ms339ms1ms3rd
https://fast.wistia.com/assets/external/publicApi.js@0.1.7399ms321ms20ms3rd
https://asana.com/396ms31ms5ms3rd
https://asana.com/_next/static/chunks/pages/%5B%5B...slug%5D%5D-81bcbcd4cfb801b0.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637110ms106ms0ms3rd
https://asana.com/_next/static/chunks/28fafed5.1d9eba965cb4ac03.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637107ms93ms8ms3rd
https://t-antenna.asana.com/gtm.js?id=GTM-5KGDZGG101ms83ms17ms3rd
https://asana.com/_next/static/chunks/pages/_app-236bbd23a55394b9.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b7336396435326263373533353030323030303862623863663783ms62ms20ms3rd
F
JS Bundles
Action
117 scripts, 841 KB unused
FIX
117 scripts, 841 KB unused
Warning::
https://t-antenna.asana.com/gtm.js?id=GTM-5KGDZGG: 253 KB unused (33%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://asana.com/_next/static/chunks/pages/_app-2...: 153 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://fast.wistia.net/assets/external/engines/hl...: 83 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.optimizely.com/js/4851607934861312.js: 80 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-117...: 64 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 841 KB
841 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://t-antenna.asana.com/gtm.js?id=GTM-5KGDZGG760 KB253 KB (33%)✓3rd
https://asana.com/_next/static/chunks/pages/_app-236bbd23a55394b9.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637238 KB153 KB (64%)✓3rd
https://fast.wistia.net/assets/external/engines/hls_video.js@0.1.7154 KB83 KB (54%)✓3rd
https://cdn.optimizely.com/js/4851607934861312.js122 KB80 KB (66%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-11757081-1&cx=c&gtm=4e6460h1&sign=9e67f56b1c5bbaaa3490aebbf62c01e7b16e263c531bf202cbe96ecddda1e122_20260407115 KB64 KB (56%)✓3rd
https://fast.wistia.com/assets/external/publicApi.js@0.1.7138 KB59 KB (43%)✓3rd
https://asana.com/_next/static/chunks/8bdd1454-3c0bbf2a5fdc8af8.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b7336396435326263373533353030323030303862623863663739 KB34 KB (87%)✓3rd
https://fast.wistia.net/assets/external/captions.js@0.1.750 KB32 KB (65%)✓3rd
https://asana.com/_next/static/chunks/59250-2eb6cc72db56138f.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b7336396435326263373533353030323030303862623863663740 KB28 KB (71%)✓3rd
https://asana.com/_next/static/chunks/28fafed5.1d9eba965cb4ac03.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b7336396435326263373533353030323030303862623863663757 KB28 KB (49%)✓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
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
21 images, 0 KB saveable
PASS
21 images, 0 KB saveable
Info::
All images are well-optimized
21 images 625 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
4 fonts (179 KB)
PASS
4 fonts (179 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

179 KB total

Render-blocking

0

of 4

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 FCP 981 ms LCP 5.3 shttps://asana.com/fonts/lausanne/TWKLausanne-300.otfTWKLausanne-300.otf https://asana.com/fonts/lausanne/TWKLausanne-300.otf — 28.6 KiB — 0 ms — font-display: swaphttps://asana.com/fonts/lausanne/TWKLausanne-500.otfTWKLausanne-500.otf https://asana.com/fonts/lausanne/TWKLausanne-500.otf — 29.8 KiB — 0 ms — font-display: swaphttps://asana.com/fonts/lausanne/TWKLausanne-400.otfTWKLausanne-400.otf https://asana.com/fonts/lausanne/TWKLausanne-400.otf — 29.7 KiB — 0 ms — font-display: swaphttps://asana.com/fonts/ghost/Ghost-Medium.otfGhost-Medium.otf https://asana.com/fonts/ghost/Ghost-Medium.otf — 91.0 KiB — 0 ms — font-display: swap
TWKLausanne-300.otf otf swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
TWKLausanne-500.otf otf swap
Size 30 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
TWKLausanne-400.otf otf swap
Size 30 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Ghost-Medium.otf otf swap
Size 91 KB
Load time 0 ms
Start 0 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)

Fixing the unchecked items could save ~54 KB and ~108 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
192 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 5384ms · 1492KB · €93/mo
asana.com
Other
Costly
Execution 2037ms
Transfer 56 KB
Monthly Cost €35/mo
asana.com
Other
Costly
Execution 1237ms
Transfer 3 KB
Monthly Cost €21/mo
Unattributable
Other
Costly
Execution 483ms
Transfer 0 KB
Monthly Cost €8/mo
fast.wistia.net
Other
Costly
Execution 432ms
Transfer 154 KB
Unused 54%
Monthly Cost €8/mo
fast.wistia.com
Other
Costly
Execution 399ms
Transfer 138 KB
Unused 43%
Monthly Cost €7/mo
asana.com
Other
Costly
Execution 396ms
Transfer 85 KB
Monthly Cost €7/mo
asana.com
Other
Optional
Execution 110ms
Transfer 1 KB
Monthly Cost €2/mo
asana.com
Other
Optional
Execution 107ms
Transfer 57 KB
Unused 49%
Monthly Cost €2/mo
t-antenna.asana.com
Other
Optional
Execution 101ms
Transfer 760 KB
Unused 33%
Monthly Cost €2/mo
asana.com
Other
Optional
Execution 83ms
Transfer 238 KB
Unused 64%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • asana.com adds 2037ms and costs ~€35/month
  • asana.com adds 1237ms and costs ~€21/month
  • Unattributable adds 483ms and costs ~€8/month
  • fast.wistia.net adds 432ms and costs ~€8/month
  • fast.wistia.com adds 399ms and costs ~€7/month
  • asana.com adds 396ms 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

asana.com takes 2037ms 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

asana.com takes 1237ms 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 483ms 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.net takes 432ms 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

54% of fast.wistia.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

fast.wistia.com takes 399ms 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

asana.com takes 396ms 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 asana.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.

Send Feedback