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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
67
GRADE
D
FIX
6
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.
100
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.

2.50 s

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

5.24 s

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

187 ms

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

0.109

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

2.50 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.

5.68 s

Page Load Progression

552 ms
1.1 s
1.7 s
2.2 s
2.8 s
3.3 s
3.9 s
4.4 s
Checks
15
5 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
8.4 MB transferred, 69 requests
FIX
8.4 MB transferred, 69 requests
Critical::
Page weighs 15.8 MB (8.4 MB transferred)
Warning::
Images are 5.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 5.6 MB
Warning::
JavaScript is 2.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.4 MB
Info::
69 HTTP requests
Info::
Estimated 1.8 g CO2 per page load
8.4 MB / 2.4 MB budget
8.4 MB transferred
69 requests
1.8 g CO2 per page load
Images 5.6 MiB 67%
JavaScript 2.4 MiB 28%
CSS 154.7 KiB 2%
Fonts 152.2 KiB 2%
Other 22.4 KiB 0%
HTML 15.0 KiB 0%
Other 14.5 KiB 0%
Other 7.8 KiB 0%
Other 667 B 0%
Other 0 B 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

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 (8.4 MiB of 8.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2342ms total JS execution
FIX
2342ms total JS execution
Warning::
https://www.jetbrains.com/_assets/common.578dd59ae...: 845ms CPU time
Warning::
https://resources.jetbrains.com/storage/optly/2661...: 421ms CPU time
Info::
Unattributable: 215ms CPU time
Info::
https://www.jetbrains.com/: 192ms CPU time
Info::
https://www.jetbrains.com/_assets/index.entry.d31a...: 172ms CPU time
Warning::
Third-party scripts: 2342ms (100% of total)

Main Thread Breakdown

Script Evaluation 49% Other 15% Parse HTML & CSS 14% Style & Layout 10% Script Parsing & Compilation 8%
ScriptTotalScriptingParse/CompileParty
https://www.jetbrains.com/_assets/common.578dd59ae3f4b25d9603.js845ms279ms116ms3rd
https://resources.jetbrains.com/storage/optly/26613100737.js421ms383ms11ms3rd
Unattributable215ms10ms0ms3rd
https://www.jetbrains.com/192ms7ms3ms3rd
https://www.jetbrains.com/_assets/index.entry.d31a7d149928a0ce6198.js172ms31ms3ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5P98171ms152ms16ms3rd
https://www.jetbrains.com/_assets/default-page.73f2ab31a743063a654e.js92ms85ms7ms3rd
https://cdn.cookiehub.eu/c2/0acea1b9.js91ms75ms9ms3rd
https://www.googletagmanager.com/gtag/js?id=G-9J976DJZ68&cx=c&gtm=4e64f089ms70ms10ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NL29B334&gtm=4e64f053ms40ms13ms3rd
F
JS Bundles
Action
11 scripts, 947 KB unused
FIX
11 scripts, 947 KB unused
Warning::
https://www.jetbrains.com/_assets/common.578dd59ae...: 592 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NL2...: 77 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-9J97...: 63 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-M8TD...: 62 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-5P9...: 56 KB unused (27%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 947 KB
947 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.jetbrains.com/_assets/common.578dd59ae3f4b25d9603.js1409 KB592 KB (42%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NL29B334&gtm=4e64f0168 KB77 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-9J976DJZ68&cx=c&gtm=4e64f0175 KB63 KB (36%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-M8TDRLXFQH&cx=c&gtm=4e64f0144 KB62 KB (43%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5P98205 KB56 KB (27%)✓3rd
https://www.jetbrains.com/_assets/default-page.73f2ab31a743063a654e.js88 KB55 KB (63%)✓3rd
https://resources.jetbrains.com/storage/optly/26613100737.js131 KB42 KB (32%)✓3rd
https://www.jetbrains.com/_assets/index.entry.d31a7d149928a0ce6198.js54 KB—✓3rd
https://www.jetbrains.com/_assets/banner-rotator.entry.12fe97407ac1e351ee5c.js27 KB—✓3rd
https://www.jetbrains.com/_assets/42830.7bc8d83c3fe13a561c98.js1 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
Page Weight Inventory
Action
69 resources · 8.4 MB · 947 KB savings available
FIX
69 resources · 8.4 MB · 947 KB savings available
Warning::
Page weight 7.4 MB over 1MB target
Got: 8.4 MB Expected: ≤ 1 MB
Info::
~947 KB of savings available
Warning::
68 third-party resources (100% of weight)
Info::
9 resources over 200KB
69 resources · 8.4 MiB · 68 third-party 7.4 MiB over 1MB target
Image 68% · 5.7 MiB
JavaScript 28% · 2.4 MiB
CSS 2% · 154.7 KiB
Font 2% · 152.2 KiB
Other 0% · 23.3 KiB
Document 0% · 15.0 KiB

~946.5 KiB of savings available

Remove unused JavaScript: 946.5 KiB
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
32 images, 0 KB saveable
REVIEW
32 images, 0 KB saveable
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/logos/customers/logo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/part/banner-section/air-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/screenshot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/logos/languages/logo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/_assets/common-ui/compon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.jetbrains.com/img/home-page/companies/... 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://www.jetbrains.com/img/logos/customers/logo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
32 images 5.6 MB
0 oversized -0 KB
22 legacy format
20 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

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

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

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
2 fonts (152 KB)
PASS
2 fonts (152 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

152 KB total

Render-blocking

0

of 2

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 2.5 s LCP 5.2 shttps://resources.jetbrains.com/storage/jetbrains-sans/google-fonts/v1.309/variable/JetBrainsSans[wght].woff2JetBrainsSans[wght].woff2 https://resources.jetbrains.com/storage/jetbrains-sans/google-fonts/v1.309/variable/JetBrainsSans[wght].woff2 — 59.2 KiB — 39 ms — font-display: swaphttps://resources.jetbrains.com/storage/jetbrains-mono/v2.304/webfonts/JetBrainsMono-Bold.woff2JetBrainsMono-Bold.woff2 https://resources.jetbrains.com/storage/jetbrains-mono/v2.304/webfonts/JetBrainsMono-Bold.woff2 — 92.9 KiB — 31 ms — font-display: swap
JetBrainsSans[wght].woff2 woff2 swap
Size 59 KB
Load time 39 ms
Start 955 ms
Risk FOUT — text flashes from fallback to web font
JetBrainsMono-Bold.woff2 woff2 swap
Size 93 KB
Load time 31 ms
Start 2.0 s
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
69 requests over 2085ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.5 s LCP 5.2 shttps://jetbrains.com// https://jetbrains.com/ — 308 — 303 B — 54 ms — h2https://www.jetbrains.com/www.jetbrains.com/ https://www.jetbrains.com/ — 200 — 13.5 KiB — 65 ms — h2https://resources.jetbrains.com/storage/optly/26613100737.jsresources.jetbrains.com/storage/opt... https://resources.jetbrains.com/storage/optly/26613100737.js — 200 — 130.8 KiB — 94 ms — h2https://www.jetbrains.com/_assets/common.741accfab50732da372d.csswww.jetbrains.com/_assets/common.74... https://www.jetbrains.com/_assets/common.741accfab50732da372d.css — 200 — 102.4 KiB — 117 ms — h2https://www.jetbrains.com/_assets/default-page.5e196666c65378bf4eb9.csswww.jetbrains.com/_assets/default-p... https://www.jetbrains.com/_assets/default-page.5e196666c65378bf4eb9.css — 200 — 31.0 KiB — 29 ms — h2https://www.jetbrains.com/_assets/index.entry.6aa9364c2c2885822d6a.csswww.jetbrains.com/_assets/index.ent... https://www.jetbrains.com/_assets/index.entry.6aa9364c2c2885822d6a.css — 200 — 4.5 KiB — 112 ms — h2https://www.jetbrains.com/_assets/common.578dd59ae3f4b25d9603.jswww.jetbrains.com/_assets/common.57... https://www.jetbrains.com/_assets/common.578dd59ae3f4b25d9603.js — 200 — 1.4 MiB — 126 ms — h2https://www.jetbrains.com/_assets/default-page.73f2ab31a743063a654e.jswww.jetbrains.com/_assets/default-p... https://www.jetbrains.com/_assets/default-page.73f2ab31a743063a654e.js — 200 — 87.7 KiB — 122 ms — h2https://www.jetbrains.com/_assets/index.entry.d31a7d149928a0ce6198.jswww.jetbrains.com/_assets/index.ent... https://www.jetbrains.com/_assets/index.entry.d31a7d149928a0ce6198.js — 200 — 53.5 KiB — 122 ms — h2https://www.jetbrains.com/_assets/banner-rotator.entry.3ef68c5b3cd7cb372be2.csswww.jetbrains.com/_assets/banner-ro... https://www.jetbrains.com/_assets/banner-rotator.entry.3ef68c5b3cd7cb372be2.css — 200 — 3.8 KiB — 111 ms — h2https://www.jetbrains.com/_assets/banner-rotator.entry.12fe97407ac1e351ee5c.jswww.jetbrains.com/_assets/banner-ro... https://www.jetbrains.com/_assets/banner-rotator.entry.12fe97407ac1e351ee5c.js — 200 — 26.9 KiB — 121 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-5P98www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-5P98 — 200 — 205.0 KiB — 250 ms — h2https://data.services.jetbrains.com/geodata.services.jetbrains.com/geo https://data.services.jetbrains.com/geo — 200 — 147 B — 117 ms — h2https://resources.jetbrains.com/directus/items/banners.jsonresources.jetbrains.com/directus/it... https://resources.jetbrains.com/directus/items/banners.json — 200 — 0 B — 82 ms — h2https://resources.jetbrains.com/directus/items/webinars.jsonresources.jetbrains.com/directus/it... https://resources.jetbrains.com/directus/items/webinars.json — 200 — 0 B — 79 ms — h2https://www.jetbrains.com/site.webmanifestwww.jetbrains.com/site.webmanifest https://www.jetbrains.com/site.webmanifest — 200 — 667 B — 28 ms — h3data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABAAAAAQACAYAAAB/HSuDAAAgAElEQVR4Aezda5RlVXno/bm7G4RGr…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABAAAAAQACAYAAAB/HSuDAAAgAElEQVR4Aezda5RlVXno/bm7G4RGr… — 200 — 0 B — 1 ms — datahttps://a26669750187.cdn.optimizely.com/client_storage/a26669750187.htmla26669750187.cdn.optimizely.com/cli... https://a26669750187.cdn.optimizely.com/client_storage/a26669750187.html — 200 — 1.5 KiB — 90 ms — h2https://resources.jetbrains.com/directus/items/webinars.jsonresources.jetbrains.com/directus/it... https://resources.jetbrains.com/directus/items/webinars.json — 200 — 871 B — 25 ms — h2https://resources.jetbrains.com/directus/items/banners.jsonresources.jetbrains.com/directus/it... https://resources.jetbrains.com/directus/items/banners.json — 200 — 7.8 KiB — 26 ms — h2https://www.jetbrains.com/shop/cart.jsonwww.jetbrains.com/shop/cart.json https://www.jetbrains.com/shop/cart.json — 200 — 387 B — 47 ms — h3https://resources.jetbrains.com/storage/jetbrains-sans/google-fonts/v1.309/variable/JetBrainsSans[wght].woff2resources.jetbrains.com/storage/jet... https://resources.jetbrains.com/storage/jetbrains-sans/google-fonts/v1.309/variable/JetBrainsSans[wght].woff2 — 200 — 59.2 KiB — 39 ms — h2https://www.jetbrains.com/_assets/www/part/banner-section/air-banner/air-banner-background.abf20a853a51187fcc3f.pngwww.jetbrains.com/_assets/www/part/... https://www.jetbrains.com/_assets/www/part/banner-section/air-banner/air-banner-background.abf20a853a51187fcc3f.png — 200 — 351.7 KiB — 92 ms — h3https://www.jetbrains.com/_assets/www/img/home-page/teamcity-pipe.725efa6d54ebb255f324.pngwww.jetbrains.com/_assets/www/img/h... https://www.jetbrains.com/_assets/www/img/home-page/teamcity-pipe.725efa6d54ebb255f324.png — 200 — 501.4 KiB — 90 ms — 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— 200 — 286 B — 126 ms — h2https://cdn.cookiehub.eu/c2/css/0acea1b9.csscdn.cookiehub.eu/c2/css/0acea1b9.cs... https://cdn.cookiehub.eu/c2/css/0acea1b9.css — 200 — 13.1 KiB — 38 ms — h2https://cdn.cookiehub.eu/client/0acea1b9/en.jsoncdn.cookiehub.eu/client/0acea1b9/en... https://cdn.cookiehub.eu/client/0acea1b9/en.json — 200 — 7.7 KiB — 82 ms — h2https://cdn.cookiehub.eu/client/0acea1b9/en.jsoncdn.cookiehub.eu/client/0acea1b9/en... https://cdn.cookiehub.eu/client/0acea1b9/en.json — 200 — 0 B — 3 ms — h2https://www.jetbrains.com/icon.svg?r=1234www.jetbrains.com/icon.svg?r=1234 https://www.jetbrains.com/icon.svg?r=1234 — 200 — 1.0 KiB — 25 ms — h3https://resources.jetbrains.com/storage/jetbrains-mono/v2.304/webfonts/JetBrainsMono-Bold.woff2resources.jetbrains.com/storage/jet... https://resources.jetbrains.com/storage/jetbrains-mono/v2.304/webfonts/JetBrainsMono-Bold.woff2 — 200 — 92.9 KiB — 31 ms — h2https://www.jetbrains.com/favicon.ico?r=1234www.jetbrains.com/favicon.ico?r=123... https://www.jetbrains.com/favicon.ico?r=1234 — 200 — 21.1 KiB — 32 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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 2342ms · 2281KB · €41/mo
www.jetbrains.com
Other
Costly
Execution 845ms
Transfer 1409 KB
Unused 42%
Monthly Cost €15/mo
resources.jetbrains.com
Other
Costly
Execution 421ms
Transfer 131 KB
Unused 32%
Monthly Cost €7/mo
Unattributable
Other
Costly
Execution 215ms
Transfer 0 KB
Monthly Cost €4/mo
www.jetbrains.com
Other
Optional
Execution 192ms
Transfer 14 KB
Monthly Cost €3/mo
www.jetbrains.com
Other
Optional
Execution 172ms
Transfer 54 KB
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Optional
Execution 171ms
Transfer 205 KB
Unused 27%
Monthly Cost €3/mo
www.jetbrains.com
Other
Optional
Execution 92ms
Transfer 88 KB
Unused 63%
Monthly Cost €2/mo
cdn.cookiehub.eu
Other
Optional
Execution 91ms
Transfer 39 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 89ms
Transfer 175 KB
Unused 36%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 53ms
Transfer 168 KB
Unused 46%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.jetbrains.com adds 845ms and costs ~€15/month
  • resources.jetbrains.com adds 421ms and costs ~€7/month
  • Unattributable adds 215ms 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

www.jetbrains.com takes 845ms 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

resources.jetbrains.com takes 421ms 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 215ms 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

63% of www.jetbrains.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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