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Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
3
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
22
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.
81
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.

11.39 s

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

37.02 s

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

5.36 s

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

0.110

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

11.39 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.

39.43 s

Page Load Progression

977 ms
2.0 s
2.9 s
3.9 s
4.9 s
5.9 s
6.8 s
7.8 s
Checks
16
8 PASS 3 REVIEW 3 FIX
F
Page Weight Budget
Action
8.9 MB transferred, 136 requests
FIX
8.9 MB transferred, 136 requests
Critical::
Page weighs 17.9 MB (8.9 MB transferred)
Warning::
Images are 5.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 5.4 MB
Warning::
JavaScript is 3.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.1 MB
Warning::
136 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.9 g CO2 per page load
8.9 MB / 2.4 MB budget
8.9 MB transferred
136 requests
1.9 g CO2 per page load
Images 5.4 MiB 61%
JavaScript 3.1 MiB 35%
CSS 159.5 KiB 2%
Fonts 152.2 KiB 2%
Other 25.0 KiB 0%
HTML 16.8 KiB 0%
Other 15.4 KiB 0%
Other 9.7 KiB 0%
Other 2.0 KiB 0%
Other 665 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

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

F
JS Execution Cost
Action
19241ms total JS execution
FIX
19241ms total JS execution
Warning::
https://www.jetbrains.com/_assets/common.f1cfd90ed...: 6688ms CPU time
Warning::
Unattributable: 1915ms CPU time
Warning::
https://www.jetbrains.com/_assets/index.entry.d4dc...: 1778ms CPU time
Warning::
https://resources.jetbrains.com/storage/optly/2661...: 1390ms CPU time
Warning::
https://www.jetbrains.com/: 1307ms CPU time
Info::
Third-party scripts: 8951ms (47% of total)

Main Thread Breakdown

Script Evaluation 50% Other 18% Parse HTML & CSS 11% Style & Layout 9% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
https://www.jetbrains.com/_assets/common.f1cfd90ed0fb4834ecc2.js6688ms2678ms539ms1st
Unattributable1915ms134ms0ms3rd
https://www.jetbrains.com/_assets/index.entry.d4dc98d0614badbe65ff.js1778ms251ms15ms1st
https://resources.jetbrains.com/storage/optly/26613100737.js1390ms1190ms71ms3rd
https://www.jetbrains.com/1307ms57ms13ms1st
https://www.googletagmanager.com/gtm.js?id=GTM-5P981178ms959ms98ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NL29B334&gtm=4e64601141ms1046ms71ms3rd
https://cdn.cookiehub.eu/c2/0acea1b9.js873ms759ms25ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js521ms435ms10ms3rd
https://www.jetbrains.com/_assets/default-page.3022c2aa953e916af023.js517ms448ms41ms1st

Showing top 10 of 22 scripts

F
JS Bundles
Action
35 scripts, 1.1 MB unused
FIX
35 scripts, 1.1 MB unused
Warning::
https://www.jetbrains.com/_assets/common.f1cfd90ed...: 534 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-107...: 105 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NL2...: 73 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://analytics.tiktok.com/i18n/pixel/static/mai...: 63 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-9J97...: 61 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.1 MB
1163 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.jetbrains.com/_assets/common.f1cfd90ed0fb4834ecc2.js1347 KB534 KB (40%)✓1st
https://www.googletagmanager.com/gtag/js?id=AW-1071903267&cx=c&gtm=4e6460146 KB105 KB (72%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NL29B334&gtm=4e6460167 KB73 KB (44%)✓3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMA.js106 KB63 KB (60%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-9J976DJZ68&cx=c&gtm=4e6460174 KB61 KB (35%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-M8TDRLXFQH&cx=c&gtm=4e6460143 KB59 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-963127096&cx=c&gtm=4e6460146 KB54 KB (37%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5P98203 KB53 KB (26%)✓3rd
https://www.jetbrains.com/_assets/default-page.3022c2aa953e916af023.js84 KB53 KB (63%)✓1st
https://resources.jetbrains.com/storage/optly/26613100737.js130 KB50 KB (38%)✓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

C
Image Optimization
Action
50 images, 0 KB saveable
REVIEW
50 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/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/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/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/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/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/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/teamcity-p... 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/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.
50 images 5.4 MB
0 oversized -0 KB
41 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

B
HTTP Caching
max-age=0
REVIEW
max-age=0
Info::
Cache-Control header is set
Got: max-age=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0

DirectiveValueMeaning
max-age0Cache for 0 seconds
A
Third-Party Impact
20% third-party, 0 ms blocking
PASS
20% third-party, 0 ms blocking
Info::
Third-party code accounts for 20% of page weight (1.8 MiB of 8.9 MiB)
Info::
Third-party blocking time is low (0 ms)
80%
20%
First-party Third-party
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 38.0 s FCP 11.4 s LCP 37.0 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 — 0 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 — 0 ms — font-display: swap
JetBrainsSans[wght].woff2 woff2 swap
Size 59 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
JetBrainsMono-Bold.woff2 woff2 swap
Size 93 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
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
136 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
47% of JavaScript execution is third-party
First-party Third-party 8951ms · 1525KB · €155/mo
Unattributable
Other
Costly
Execution 1915ms
Transfer 0 KB
Monthly Cost €33/mo
resources.jetbrains.com
Other
Costly
Execution 1390ms
Transfer 130 KB
Unused 38%
Monthly Cost €24/mo
Google Tag Manager
Tag Manager
Costly
Execution 1178ms
Transfer 203 KB
Unused 26%
Monthly Cost €20/mo
Google Tag Manager
Tag Manager
Costly
Execution 1141ms
Transfer 167 KB
Unused 44%
Monthly Cost €20/mo
cdn.cookiehub.eu
Other
Costly
Execution 873ms
Transfer 38 KB
Monthly Cost €15/mo
Microsoft Clarity
Session Replay
Costly
Execution 521ms
Transfer 26 KB
Monthly Cost €9/mo
Google Tag Manager
Tag Manager
Costly
Execution 417ms
Transfer 174 KB
Unused 35%
Monthly Cost €7/mo
analytics.tiktok.com
Other
Costly
Execution 266ms
Transfer 106 KB
Unused 60%
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 247ms
Transfer 146 KB
Unused 37%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 224ms
Transfer 143 KB
Unused 42%
Monthly Cost €4/mo
Facebook Pixel
Advertising
Optional
Execution 174ms
Transfer 95 KB
Unused 35%
Monthly Cost €3/mo
Facebook Pixel
Advertising
Optional
Execution 171ms
Transfer 44 KB
Monthly Cost €3/mo
www.redditstatic.com
Other
Optional
Execution 95ms
Transfer 19 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 87ms
Transfer 146 KB
Unused 72%
Monthly Cost €2/mo
Twitter/X Pixel
Advertising
Optional
Execution 76ms
Transfer 13 KB
Monthly Cost €1/mo
Bing UET
Advertising
Optional
Execution 63ms
Transfer 15 KB
Monthly Cost €1/mo
analytics.tiktok.com
Other
Optional
Execution 61ms
Transfer 39 KB
Monthly Cost €1/mo
LinkedIn Insight
Advertising
Optional
Execution 52ms
Transfer 19 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 1915ms and costs ~€33/month
  • resources.jetbrains.com adds 1390ms and costs ~€24/month
  • Google Tag Manager adds 1178ms and costs ~€20/month
  • Google Tag Manager adds 1141ms and costs ~€20/month
  • cdn.cookiehub.eu adds 873ms and costs ~€15/month
  • Microsoft Clarity adds 521ms and costs ~€9/month
  • Google Tag Manager adds 417ms and costs ~€7/month
  • analytics.tiktok.com adds 266ms and costs ~€5/month
  • Google Tag Manager adds 247ms and costs ~€4/month
  • Google Tag Manager adds 224ms and costs ~€4/month

47% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 1915ms 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 1390ms 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 1178ms 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 1141ms 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 873ms 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

Microsoft Clarity takes 521ms 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 417ms 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

analytics.tiktok.com takes 266ms 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 analytics.tiktok.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 247ms 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 224ms 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

72% 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

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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