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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
1
PASS
6
INFO
2

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

Mobile Desktop
59
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.
73
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.

1.51 s

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

2.69 s

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

396 ms

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

0.001

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

2.21 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.

4.30 s

Page Load Progression

669 ms
1.3 s
2.0 s
2.7 s
3.3 s
4.0 s
4.7 s
5.4 s
Checks
14
6 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
7.3 MB transferred, 118 requests
FIX
7.3 MB transferred, 118 requests
Critical::
Page weighs 17.0 MB (7.3 MB transferred)
Warning::
Images are 1.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.6 MB
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::
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::
118 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
7.3 MB / 2.4 MB budget
7.3 MB transferred
118 requests
1.5 g CO2 per page load
Other 3.6 MiB 50%
Images 1.6 MiB 22%
JavaScript 1.3 MiB 18%
CSS 451.4 KiB 6%
Fonts 299.3 KiB 4%
Other 50.9 KiB 1%
HTML 28.1 KiB 0%
Other 10.0 KiB 0%
Other 1.6 KiB 0%
0 2.4 MB 4.9 MB
Over budget

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

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

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 (7.3 MiB of 7.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3227ms total JS execution
FIX
3227ms total JS execution
Warning::
https://discord.com/w/assets/10907dcf2b5e3687b6580...: 828ms CPU time
Warning::
Unattributable: 574ms CPU time
Warning::
https://cdn.prod.website-files.com/6257adef93867e5...: 552ms CPU time
Warning::
https://discord.com/: 488ms CPU time
Warning::
https://cdn.prod.website-files.com/6257adef93867e5...: 279ms CPU time
Warning::
Third-party scripts: 3227ms (100% of total)

Main Thread Breakdown

Script Evaluation 47% Other 23% Script Parsing & Compilation 12% Style & Layout 10% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://discord.com/w/assets/10907dcf2b5e3687b658036d0f4dea64aa95512c/index-consolidated.js828ms531ms51ms3rd
Unattributable574ms35ms0ms3rd
https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/js/discord-2022.fc2be901.dbbaaf93e006fa4d.js552ms551ms0ms3rd
https://discord.com/488ms35ms2ms3rd
https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/js/discord-2022.schunk.5fd8e2d9d7a2cad2.js279ms18ms234ms3rd
https://discord.com/cdn-cgi/challenge-platform/scripts/jsd/main.js103ms96ms1ms3rd
https://cdn.prod.website-files.com/6257adef93867e50d84d30e2/js/discord-2022.schunk.36b8fb49256177c8.js85ms36ms3ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N7BVC2W&gtm_auth=GI0g9O-54_SitcgmxQKxlA&gtm_preview=env-2&gtm_cookies_win=x77ms61ms15ms3rd
https://d3e54v103j8qbb.cloudfront.net/js/jquery-3.5.1.min.dc5e7f18c8.js?site=6257adef93867e50d84d30e266ms51ms4ms3rd
https://discord.com/w/assets/latest/671.js61ms48ms13ms3rd

Showing top 10 of 12 scripts

F
JS Bundles
Action
23 scripts, 556 KB unused
FIX
23 scripts, 556 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 (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://discord.com/w/assets/latest/loginOrDownloa...: 49 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 556 KB
556 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.js98 KB65 KB (67%)✓3rd
https://discord.com/w/assets/latest/loginOrDownload.js73 KB49 KB (71%)✓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=6257adef93867e50d84d30e230 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.

C
Image Optimization
Action
56 images, 0 KB saveable
REVIEW
56 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.
Warning::
https://cdn.prod.website-files.com/6257adef93867e5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
56 images 1.6 MB
0 oversized -0 KB
28 legacy format
2 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

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 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.5 s LCP 2.7 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 48 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
118 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 3227ms · 1444KB · €52/mo
discord.com
Other
Costly
Execution 828ms
Transfer 374 KB
Unused 53%
Monthly Cost €13/mo
Unattributable
Other
Costly
Execution 574ms
Transfer 0 KB
Monthly Cost €9/mo
cdn.prod.website-files.com
Other
Costly
Execution 552ms
Transfer 2 KB
Monthly Cost €9/mo
discord.com
Other
Costly
Execution 488ms
Transfer 28 KB
Monthly Cost €8/mo
cdn.prod.website-files.com
Other
Costly
Execution 279ms
Transfer 256 KB
Monthly Cost €4/mo
discord.com
Other
Optional
Execution 103ms
Transfer 0 KB
Monthly Cost €2/mo
cdn.prod.website-files.com
Other
Optional
Execution 85ms
Transfer 14 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 77ms
Transfer 146 KB
Unused 60%
Monthly Cost €1/mo
d3e54v103j8qbb.cloudfront.net
Other
Optional
Execution 66ms
Transfer 30 KB
Monthly Cost €1/mo
discord.com
Other
Optional
Execution 61ms
Transfer 98 KB
Unused 67%
Monthly Cost €1/mo
discord.com
Other
Optional
Execution 60ms
Transfer 109 KB
Unused 62%
Monthly Cost €1/mo
cdn.prod.website-files.com
Other
Optional
Execution 55ms
Transfer 387 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • discord.com adds 828ms and costs ~€13/month
  • Unattributable adds 574ms and costs ~€9/month
  • cdn.prod.website-files.com adds 552ms and costs ~€9/month
  • discord.com adds 488ms and costs ~€8/month
  • cdn.prod.website-files.com adds 279ms 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

discord.com takes 828ms 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

Unattributable takes 574ms 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 552ms 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 488ms 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 279ms 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

67% 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

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

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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