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Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
1
PASS
8
INFO
2

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

Mobile Desktop
27
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.
69
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

7.13 s

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

16.47 s

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

1.87 s

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

0.092

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

9.69 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.

21.18 s

Page Load Progression

452 ms
903 ms
1.4 s
1.8 s
2.3 s
2.7 s
3.2 s
3.6 s
Checks
16
8 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
6.8 MB transferred, 111 requests
FIX
6.8 MB transferred, 111 requests
Critical::
Page weighs 16.5 MB (6.8 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
Warning::
Images are 1.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.0 MB
Info::
CSS is 451 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 451 KB
Info::
Fonts are 299 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 299 KB
Warning::
111 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.4 g CO2 per page load
6.8 MB / 2.4 MB budget
6.8 MB transferred
111 requests
1.4 g CO2 per page load
Other 3.6 MiB 54%
JavaScript 1.3 MiB 19%
Images 1.0 MiB 15%
CSS 451.4 KiB 6%
Fonts 299.4 KiB 4%
Other 50.9 KiB 1%
HTML 28.1 KiB 0%
Other 9.1 KiB 0%
Other 1.6 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

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

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 (6.8 MiB of 6.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
10371ms total JS execution
FIX
10371ms total JS execution
Warning::
Unattributable: 2336ms CPU time
Warning::
https://discord.com/w/assets/10907dcf2b5e3687b6580...: 2113ms CPU time
Warning::
https://cdn.prod.website-files.com/6257adef93867e5...: 2022ms CPU time
Warning::
https://discord.com/: 989ms CPU time
Warning::
https://cdn.prod.website-files.com/6257adef93867e5...: 985ms CPU time
Warning::
Third-party scripts: 10371ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Other 27% Script Parsing & Compilation 13% Style & Layout 7%
ScriptTotalScriptingParse/CompileParty
Unattributable2336ms134ms0ms3rd
https://discord.com/w/assets/10907dcf2b5e3687b658036d0f4dea64aa95512c/index-consolidated.js2113ms1395ms210ms3rd
https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/js/discord-2022.fc2be901.dbbaaf93e006fa4d.js2022ms1827ms1ms3rd
https://discord.com/989ms104ms7ms3rd
https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/js/discord-2022.schunk.5fd8e2d9d7a2cad2.js985ms14ms772ms3rd
https://discord.com/cdn-cgi/challenge-platform/scripts/jsd/main.js378ms362ms4ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N7BVC2W&gtm_auth=GI0g9O-54_SitcgmxQKxlA&gtm_preview=env-2&gtm_cookies_win=x281ms212ms66ms3rd
https://discord.com/assets/oneTrust/v7/scripttemplates/202501.2.0/otBannerSdk.js236ms98ms73ms3rd
https://discord.com/w/assets/latest/671.js221ms172ms48ms3rd
https://d3e54v103j8qbb.cloudfront.net/js/jquery-3.5.1.min.dc5e7f18c8.js?site=6257adef93867e50d84d30e2219ms162ms25ms3rd

Showing top 10 of 14 scripts

F
JS Bundles
Action
23 scripts, 555 KB unused
FIX
23 scripts, 555 KB unused
Warning::
https://discord.com/w/assets/10907dcf2b5e3687b6580...: 192 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-N7B...: 87 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://discord.com/assets/oneTrust/v7/scripttempl...: 68 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://discord.com/w/assets/latest/671.js: 65 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://discord.com/w/assets/latest/loginOrDownloa...: 48 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 555 KB
555 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://discord.com/w/assets/10907dcf2b5e3687b658036d0f4dea64aa95512c/index-consolidated.js374 KB192 KB (53%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N7BVC2W&gtm_auth=GI0g9O-54_SitcgmxQKxlA&gtm_preview=env-2&gtm_cookies_win=x146 KB87 KB (60%)✓3rd
https://discord.com/assets/oneTrust/v7/scripttemplates/202501.2.0/otBannerSdk.js109 KB68 KB (62%)✓3rd
https://discord.com/w/assets/latest/671.js97 KB65 KB (68%)✓3rd
https://discord.com/w/assets/latest/loginOrDownload.js73 KB48 KB (69%)✓3rd
https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/js/discord-2022.schunk.c42549641b7d4501.js76 KB46 KB (61%)✓3rd
https://discord.com/w/assets/latest/52.js52 KB28 KB (63%)✓3rd
https://cdn.localizeapi.com/localize.js26 KB21 KB (81%)✓3rd
https://d3e54v103j8qbb.cloudfront.net/js/jquery-3.5.1.min.dc5e7f18c8.js?site=6257adef93867e50d84d30e231 KB—✓3rd
https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/js/discord-2022.schunk.36b8fb49256177c8.js14 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
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
49 images, 0 KB saveable
REVIEW
49 images, 0 KB saveable
Warning::
https://cdn.prod.website-files.com/6257adef93867e5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
49 images 1.0 MB
0 oversized -0 KB
22 legacy format
1 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

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
8 fonts (299 KB)
PASS
8 fonts (299 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

299 KB total

Render-blocking

0

of 8

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s FCP 7.1 s LCP 16.5 sdata:application/x-font-ttf;charset=utf-8;base64,AAEAAAALAIAAAwAwT1MvMg8SBiUAAAC8AAAAYGNtYXDpP+a4AA…x-font-ttf;charset=utf-... data:application/x-font-ttf;charset=utf-8;base64,AAEAAAALAIAAAwAwT1MvMg8SBiUAAAC8AAAAYGNtYXDpP+a4AA… — 0 B — 0 ms — font-display: swaphttps://cdn.prod.website-files.com/6257adef93867e50d84d30e2/67110a452ee74d65f90c1dc0_ABCGintoDiscord-Medium.woff267110a452ee74d65f90c1dc... https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/67110a452ee74d65f90c1dc0_ABCGintoDiscord-Medium.woff2 — 48.5 KiB — 0 ms — font-display: swaphttps://cdn.prod.website-files.com/6257adef93867e50d84d30e2/67110b10efb84547ce5e8ef7_ABCGintoDiscordNord-Bold.woff267110b10efb84547ce5e8ef... https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/67110b10efb84547ce5e8ef7_ABCGintoDiscordNord-Bold.woff2 — 50.7 KiB — 0 ms — font-display: swaphttps://cdn.prod.website-files.com/6257adef93867e50d84d30e2/67110a451d677abf8340c6da_ABCGintoDiscord-Regular.woff267110a451d677abf8340c6d... https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/67110a451d677abf8340c6da_ABCGintoDiscord-Regular.woff2 — 44.0 KiB — 0 ms — font-display: swaphttps://cdn.prod.website-files.com/6257adef93867e50d84d30e2/652736292cbf8363b43d077a_ggsans-Normal.woff2652736292cbf8363b43d077... https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/652736292cbf8363b43d077a_ggsans-Normal.woff2 — 31.5 KiB — 0 ms — font-display: swaphttps://discord.com/w/assets/latest/127465eff7b4a91feb3f8ac7f3cb2bde.woff2127465eff7b4a91feb3f8ac... https://discord.com/w/assets/latest/127465eff7b4a91feb3f8ac7f3cb2bde.woff2 — 59.7 KiB — 0 ms — font-display: swaphttps://cdn.prod.website-files.com/6257adef93867e50d84d30e2/652737c319ba7da75394c4dc_ggsans-Semibold.woff2652737c319ba7da75394c4d... https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/652737c319ba7da75394c4dc_ggsans-Semibold.woff2 — 32.7 KiB — 0 ms — font-display: swaphttps://cdn.prod.website-files.com/6257adef93867e50d84d30e2/652737c30510e4ad4333a424_ggsans-Bold.woff2652737c30510e4ad4333a42... https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/652737c30510e4ad4333a424_ggsans-Bold.woff2 — 32.3 KiB — 0 ms — font-display: swap
x-font-ttf;charset=utf-... unknown swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
67110a452ee74d65f90c1dc... woff2 swap
Size 49 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
67110b10efb84547ce5e8ef... woff2 swap
Size 51 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
67110a451d677abf8340c6d... woff2 swap
Size 44 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
652736292cbf8363b43d077... woff2 swap
Size 32 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
127465eff7b4a91feb3f8ac... woff2 swap
Size 60 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
652737c319ba7da75394c4d... woff2 swap
Size 33 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
652737c30510e4ad4333a42... woff2 swap
Size 32 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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
2
preload
1
dns-prefetch
—
prefetch
—

3 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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
111 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 10371ms · 1520KB · €166/mo
Unattributable
Other
Costly
Execution 2336ms
Transfer 0 KB
Monthly Cost €37/mo
discord.com
Other
Costly
Execution 2113ms
Transfer 374 KB
Unused 53%
Monthly Cost €34/mo
cdn.prod.website-files.com
Other
Costly
Execution 2022ms
Transfer 2 KB
Monthly Cost €32/mo
discord.com
Other
Costly
Execution 989ms
Transfer 28 KB
Monthly Cost €16/mo
cdn.prod.website-files.com
Other
Costly
Execution 985ms
Transfer 256 KB
Monthly Cost €16/mo
discord.com
Other
Costly
Execution 378ms
Transfer 0 KB
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 281ms
Transfer 146 KB
Unused 60%
Monthly Cost €4/mo
discord.com
Other
Costly
Execution 236ms
Transfer 109 KB
Unused 62%
Monthly Cost €4/mo
discord.com
Other
Costly
Execution 221ms
Transfer 97 KB
Unused 68%
Monthly Cost €4/mo
d3e54v103j8qbb.cloudfront.net
Other
Costly
Execution 219ms
Transfer 31 KB
Monthly Cost €4/mo
cdn.prod.website-files.com
Other
Costly
Execution 212ms
Transfer 387 KB
Monthly Cost €3/mo
discord.com
Other
Optional
Execution 174ms
Transfer 73 KB
Unused 69%
Monthly Cost €3/mo
cdn.prod.website-files.com
Other
Optional
Execution 133ms
Transfer 7 KB
Monthly Cost €2/mo
discord.com
Other
Optional
Execution 72ms
Transfer 9 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 2336ms and costs ~€37/month
  • discord.com adds 2113ms and costs ~€34/month
  • cdn.prod.website-files.com adds 2022ms and costs ~€32/month
  • discord.com adds 989ms and costs ~€16/month
  • cdn.prod.website-files.com adds 985ms and costs ~€16/month
  • discord.com adds 378ms and costs ~€6/month
  • Google Tag Manager adds 281ms and costs ~€4/month
  • discord.com adds 236ms and costs ~€4/month
  • discord.com adds 221ms and costs ~€4/month
  • d3e54v103j8qbb.cloudfront.net adds 219ms and costs ~€4/month
  • cdn.prod.website-files.com adds 212ms 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

Unattributable takes 2336ms 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

discord.com takes 2113ms 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 discord.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

cdn.prod.website-files.com takes 2022ms 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

discord.com takes 989ms 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

cdn.prod.website-files.com takes 985ms 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

discord.com takes 378ms 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

Google Tag Manager takes 281ms 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

60% 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

discord.com takes 236ms 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

62% of discord.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

discord.com takes 221ms 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

68% of discord.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

d3e54v103j8qbb.cloudfront.net takes 219ms 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

cdn.prod.website-files.com takes 212ms 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

69% of discord.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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