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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
67
GRADE
D
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
39
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
84
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.

16.33 s

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

34.37 s

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

628 ms

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

0.000

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

16.33 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.

35.46 s

Page Load Progression

584 ms
1.2 s
1.8 s
2.3 s
2.9 s
3.5 s
4.1 s
4.7 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
7.9 MB transferred, 68 requests
FIX
7.9 MB transferred, 68 requests
Critical::
Page weighs 15.3 MB (7.9 MB transferred)
Warning::
Images are 5.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 5.1 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::
68 HTTP requests
Info::
Estimated 1.7 g CO2 per page load
7.9 MB / 2.4 MB budget
7.9 MB transferred
68 requests
1.7 g CO2 per page load
Images 5.1 MiB 65%
JavaScript 2.4 MiB 30%
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 (7.9 MiB of 7.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
8024ms total JS execution
FIX
8024ms total JS execution
Warning::
https://www.jetbrains.com/_assets/common.578dd59ae...: 3244ms CPU time
Warning::
Unattributable: 763ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-5P9...: 725ms CPU time
Warning::
https://resources.jetbrains.com/storage/optly/2661...: 630ms CPU time
Warning::
https://www.jetbrains.com/_assets/index.entry.d31a...: 591ms CPU time
Warning::
Third-party scripts: 8024ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Parse HTML & CSS 18% Other 14% Style & Layout 10% Script Parsing & Compilation 8%
ScriptTotalScriptingParse/CompileParty
https://www.jetbrains.com/_assets/common.578dd59ae3f4b25d9603.js3244ms1110ms317ms3rd
Unattributable763ms38ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5P98725ms647ms58ms3rd
https://resources.jetbrains.com/storage/optly/26613100737.js630ms551ms56ms3rd
https://www.jetbrains.com/_assets/index.entry.d31a7d149928a0ce6198.js591ms120ms9ms3rd
https://www.jetbrains.com/509ms30ms8ms3rd
https://cdn.cookiehub.eu/c2/0acea1b9.js446ms265ms12ms3rd
https://www.jetbrains.com/_assets/default-page.73f2ab31a743063a654e.js345ms302ms23ms3rd
https://www.googletagmanager.com/gtag/js?id=G-9J976DJZ68&cx=c&gtm=4e64f0&bs=ctrl2339ms285ms51ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NL29B334&gtm=4e64f0&bs=ctrl2246ms184ms60ms3rd

Showing top 10 of 11 scripts

F
JS Bundles
Action
11 scripts, 954 KB unused
FIX
11 scripts, 954 KB unused
Warning::
https://www.jetbrains.com/_assets/common.578dd59ae...: 591 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.jetbrains.com/_assets/default-page.73f...: 56 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 954 KB
954 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.jetbrains.com/_assets/common.578dd59ae3f4b25d9603.js1409 KB591 KB (42%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NL29B334&gtm=4e64f0&bs=ctrl2168 KB77 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-9J976DJZ68&cx=c&gtm=4e64f0&bs=ctrl2175 KB63 KB (36%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-M8TDRLXFQH&cx=c&gtm=4e64f0&bs=ctrl2144 KB62 KB (43%)✓3rd
https://www.jetbrains.com/_assets/default-page.73f2ab31a743063a654e.js88 KB56 KB (64%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5P98205 KB55 KB (27%)✓3rd
https://resources.jetbrains.com/storage/optly/26613100737.js131 KB50 KB (39%)✓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
68 resources · 7.9 MB · 954 KB savings available
FIX
68 resources · 7.9 MB · 954 KB savings available
Warning::
Page weight 6.9 MB over 1MB target
Got: 7.9 MB Expected: ≤ 1 MB
Info::
~954 KB of savings available
Warning::
67 third-party resources (100% of weight)
Info::
8 resources over 200KB
68 resources · 7.9 MiB · 67 third-party 6.9 MiB over 1MB target
Image 66% · 5.2 MiB
JavaScript 30% · 2.4 MiB
CSS 2% · 154.7 KiB
Font 2% · 152.2 KiB
Other 0% · 23.3 KiB
Document 0% · 15.0 KiB

~954.2 KiB of savings available

Remove unused JavaScript: 954.2 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
30 images, 0 KB saveable
REVIEW
30 images, 0 KB saveable
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::
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/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/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/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/teamcity-p... 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/screenshot... 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/logos/languages/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/screenshot... 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.
30 images 5.1 MB
0 oversized -0 KB
21 legacy format
23 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

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

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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s FCP 16.3 s LCP 34.4 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 — 38 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 — 30 ms — font-display: swap
JetBrainsSans[wght].woff2 woff2 swap
Size 59 KB
Load time 38 ms
Start 839 ms
Risk FOUT — text flashes from fallback to web font
JetBrainsMono-Bold.woff2 woff2 swap
Size 93 KB
Load time 30 ms
Start 2.1 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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
1
preload
—
dns-prefetch
—
prefetch
—

1 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
Network Waterfall
68 requests over 2155ms
INFO
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 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s FCP 16.3 s LCP 34.4 shttps://jetbrains.com// https://jetbrains.com/ — 308 — 304 B — 58 ms — h2https://www.jetbrains.com/www.jetbrains.com/ https://www.jetbrains.com/ — 200 — 13.5 KiB — 70 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 — 124 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 — 50 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 — 30.9 KiB — 55 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 — 106 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 — 124 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 — 66 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 — 121 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 — 49 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 — 120 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 — 280 ms — h2https://data.services.jetbrains.com/geodata.services.jetbrains.com/geo https://data.services.jetbrains.com/geo — 200 — 147 B — 185 ms — h2https://resources.jetbrains.com/directus/items/banners.jsonresources.jetbrains.com/directus/it... https://resources.jetbrains.com/directus/items/banners.json — 200 — 0 B — 79 ms — h2https://resources.jetbrains.com/directus/items/webinars.jsonresources.jetbrains.com/directus/it... https://resources.jetbrains.com/directus/items/webinars.json — 200 — 0 B — 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https://sgtm.jetbrains.com/g/collect?v=2&tid=G-M8TDRLXFQH&gtm=45je64f0v9199936761z8558776za20gzb558776zd558776&_p=1776363606479&gcs=G100&gcd=13p3p3p2p5l1&npa=1&dma_cps=-&dma=1&gdid=dMzY0Yz&ecid=620220756&_fplc=0&are=1&cid=1150495712.1776363608&frm=0&pscdl=denied&rcb=15&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.55%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&ur=ES-MD&sst.rnd=493173349.1776363608&sst.etld=google.es&sst.gcsub=region1&sst.tft=1776363606479&sst.lpc=227498630&sst.navt=n&sst.ude=0&_s=1&tag_exp=0~115616986~115938466~115938468~117266400~117384405~118289195&dl=https%3A%2F%2Fwww.jetbrains.com%2F&sid=1776363607&sct=1&seg=0&dt=JetBrains%3A%20Essential%20tools%20for%20software%20developers%20and%20teams&_tu=RA&en=page_view&_fv=1&_ss=1&ep.page=www.jetbrains.com%2F&ep.triggered_event=gtm.init&ep.container_id_version=GTM-5P98_3118&ep.page_locale=en-us&up.user_country=FR&up.user_country-region=undefined&up.user_os_color_theme=light&up.user_screen_density=1.8&up.user_GPC=0&up.prefers_reduced_motion=no-preference&tfd=1652&richsstsse — 200 — 276 B — 164 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 — 24 ms — h3https://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 — 28 ms — h3https://region-eu.cookiehub.net/region-eu.cookiehub.net/ https://region-eu.cookiehub.net/ — 200 — 128 B — 34 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 — 31 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 — 98 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 — 66 ms — h2https://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 — 30 ms — h2
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 8024ms · 2424KB · €139/mo
www.jetbrains.com
Other
Costly
Execution 3244ms
Transfer 1409 KB
Unused 42%
Monthly Cost €56/mo
Unattributable
Other
Costly
Execution 763ms
Transfer 0 KB
Monthly Cost €13/mo
Google Tag Manager
Tag Manager
Costly
Execution 725ms
Transfer 205 KB
Unused 27%
Monthly Cost €13/mo
resources.jetbrains.com
Other
Costly
Execution 630ms
Transfer 131 KB
Unused 39%
Monthly Cost €11/mo
www.jetbrains.com
Other
Costly
Execution 591ms
Transfer 54 KB
Monthly Cost €10/mo
www.jetbrains.com
Other
Costly
Execution 509ms
Transfer 14 KB
Monthly Cost €9/mo
cdn.cookiehub.eu
Other
Costly
Execution 446ms
Transfer 39 KB
Monthly Cost €8/mo
www.jetbrains.com
Other
Costly
Execution 345ms
Transfer 88 KB
Unused 64%
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 339ms
Transfer 175 KB
Unused 36%
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 246ms
Transfer 168 KB
Unused 46%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Optional
Execution 187ms
Transfer 144 KB
Unused 43%
Monthly Cost €3/mo

These scripts may cost more than they're worth

  • www.jetbrains.com adds 3244ms and costs ~€56/month
  • Unattributable adds 763ms and costs ~€13/month
  • Google Tag Manager adds 725ms and costs ~€13/month
  • resources.jetbrains.com adds 630ms and costs ~€11/month
  • www.jetbrains.com adds 591ms and costs ~€10/month
  • www.jetbrains.com adds 509ms and costs ~€9/month
  • cdn.cookiehub.eu adds 446ms and costs ~€8/month
  • www.jetbrains.com adds 345ms and costs ~€6/month
  • Google Tag Manager adds 339ms and costs ~€6/month
  • Google Tag Manager adds 246ms 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 3244ms 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 763ms 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 725ms 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 630ms 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.jetbrains.com takes 591ms 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.jetbrains.com takes 509ms 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.cookiehub.eu takes 446ms 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.jetbrains.com takes 345ms 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 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

Google Tag Manager takes 339ms 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 246ms 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

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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