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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
3
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
36
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

6.30 s

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

55.60 s

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

1.21 s

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.

6.30 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.

74.98 s

Page Load Progression

638 ms
1.3 s
1.9 s
2.6 s
3.2 s
3.8 s
4.5 s
5.1 s
Checks
14
7 PASS 2 REVIEW 3 FIX
F
Page Weight Budget
Action
17.4 MB transferred, 117 requests
FIX
17.4 MB transferred, 117 requests
Critical::
Page weighs 25.4 MB (17.4 MB transferred)
Warning::
Images are 15.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 15.5 MB
Warning::
JavaScript is 1.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.1 MB
Info::
CSS is 399 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 399 KB
Info::
Fonts are 268 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 268 KB
Warning::
117 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 3.6 g CO2 per page load
17.4 MB / 2.4 MB budget
17.4 MB transferred
117 requests
3.6 g CO2 per page load
Images 15.5 MiB 89%
JavaScript 1.1 MiB 7%
CSS 399.1 KiB 2%
Fonts 268.0 KiB 2%
HTML 101.2 KiB 1%
Other 3.4 KiB 0%
Other 1.2 KiB 0%
Other 560 B 0%
Other 373 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

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

F
JS Execution Cost
Action
6402ms total JS execution
FIX
6402ms total JS execution
Warning::
Unattributable: 1865ms CPU time
Warning::
https://firebase.google.com/: 1625ms CPU time
Warning::
https://www.gstatic.com/devrel-devsite/prod/vb4124...: 602ms CPU time
Warning::
https://www.gstatic.com/devrel-devsite/prod/vb4124...: 419ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-N84...: 397ms CPU time
Warning::
Third-party scripts: 4777ms (75% of total)

Main Thread Breakdown

Script Evaluation 36% Other 32% Style & Layout 18% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
Unattributable1865ms154ms0ms3rd
https://firebase.google.com/1625ms34ms3ms1st
https://www.gstatic.com/devrel-devsite/prod/vb4124e0eb36966d1f5cf3a7ca116e70a424f5334bce4dd1449f7f3a599cf8e09/firebase/js/devsite_app_module.js602ms310ms37ms3rd
https://www.gstatic.com/devrel-devsite/prod/vb4124e0eb36966d1f5cf3a7ca116e70a424f5334bce4dd1449f7f3a599cf8e09/firebase/js/devsite_app_custom_elements_module.js419ms200ms162ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N84485397ms337ms54ms3rd
https://www.googletagmanager.com/gtag/js?id=G-CW55HF8NVT&cx=c&gtm=4e6411321ms267ms51ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KFPLMHC315ms243ms56ms3rd
https://www.googletagmanager.com/gtag/js?id=G-64EQFFKSHW&l=atDataLayer&cx=c&gtm=4e6411305ms247ms55ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NDV7K7V5&l=atDataLayer256ms204ms49ms3rd
https://www.gstatic.com/devrel-devsite/prod/vb4124e0eb36966d1f5cf3a7ca116e70a424f5334bce4dd1449f7f3a599cf8e09/firebase/js/devsite_devsite_header_module.js117ms42ms1ms3rd

Showing top 10 of 12 scripts

F
JS Bundles
Action
55 scripts, 696 KB unused
FIX
55 scripts, 696 KB unused
Warning::
https://www.gstatic.com/devrel-devsite/prod/vb4124...: 157 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/devrel-devsite/prod/vb4124...: 157 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KFP...: 85 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-N84...: 62 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-64EQ...: 60 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 696 KB
696 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/devrel-devsite/prod/vb4124e0eb36966d1f5cf3a7ca116e70a424f5334bce4dd1449f7f3a599cf8e09/firebase/js/devsite_app_custom_elements_module.js302 KB157 KB (52%)✓3rd
https://www.gstatic.com/devrel-devsite/prod/vb4124e0eb36966d1f5cf3a7ca116e70a424f5334bce4dd1449f7f3a599cf8e09/firebase/js/devsite_app_custom_elements_module.js0 KB157 KB (52%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KFPLMHC154 KB85 KB (55%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N84485139 KB62 KB (44%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-64EQFFKSHW&l=atDataLayer&cx=c&gtm=4e6411142 KB60 KB (42%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NDV7K7V5&l=atDataLayer129 KB60 KB (47%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-CW55HF8NVT&cx=c&gtm=4e6411147 KB59 KB (40%)✓3rd
https://www.gstatic.com/devrel-devsite/prod/vb4124e0eb36966d1f5cf3a7ca116e70a424f5334bce4dd1449f7f3a599cf8e09/firebase/js/devsite_app_module.js58 KB28 KB (47%)✓3rd
https://www.gstatic.com/devrel-devsite/prod/vb4124e0eb36966d1f5cf3a7ca116e70a424f5334bce4dd1449f7f3a599cf8e09/firebase/js/devsite_app_module.js58 KB28 KB (47%)✓3rd
https://www.gstatic.com/devrel-devsite/prod/vb4124e0eb36966d1f5cf3a7ca116e70a424f5334bce4dd1449f7f3a599cf8e09/firebase/js/devsite_devsite_footer_promos_module.js0 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

C
Image Optimization
Action
23 images, 0 KB saveable
REVIEW
23 images, 0 KB saveable
Warning::
https://firebase.google.com/static/images/integrat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://firebase.google.com/static/images/icons/fi... 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://firebase.google.com/static/images/integrat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://firebase.google.com/static/images/integrat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://firebase.google.com/static/images/integrat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://firebase.google.com/static/images/integrat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://firebase.google.com/static/images/products... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://firebase.google.com/static/images/icons/fi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://firebase.google.com/static/images/integrat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://firebase.google.com/static/images/integrat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://firebase.google.com/static/images/integrat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://firebase.google.com/static/images/integrat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://firebase.google.com/static/images/integrat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
23 images 15.5 MB
0 oversized -0 KB
16 legacy format
14 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

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

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

B
HTTP Caching
no-cache, must-revalidate
REVIEW
no-cache, must-revalidate
Info::
Cache-Control header is set
Got: no-cache, must-revalidate
Info::
Last-Modified header present
Cache-Control

no-cache, must-revalidate

DirectiveValueMeaning
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
A+
Third-Party Impact
10% third-party, 0 ms blocking
PASS
10% third-party, 0 ms blocking
Info::
Third-party code accounts for 10% of page weight (1.7 MiB of 17.4 MiB)
Info::
Third-party blocking time is low (0 ms)
90%
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
6 fonts (268 KB)
PASS
6 fonts (268 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

268 KB total

Render-blocking

0

of 6

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 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s FCP 6.3 s LCP 55.6 shttps://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff24UasrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff2 — 35.3 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2flUhRq6tzZclQEJ-Vdg-Iui... https://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2 — 125.6 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/jetbrainsmono/v24/tDbV2o-flEEny0FZhsfKu5WU4xD7OwGtT0rU.woff2tDbV2o-flEEny0FZhsfKu5W... https://fonts.gstatic.com/s/jetbrainsmono/v24/tDbV2o-flEEny0FZhsfKu5WU4xD7OwGtT0rU.woff2 — 39.6 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvQ.woff24UasrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvQ.woff2 — 35.4 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/robotomono/v31/L0x5DF4xlVMF-BfR8bXMIjhLq38.woff2L0x5DF4xlVMF-BfR8bXMIjh... https://fonts.gstatic.com/s/robotomono/v31/L0x5DF4xlVMF-BfR8bXMIjhLq38.woff2 — 32.1 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPlwUvbQoi-Entw.woff24UasrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPlwUvbQoi-Entw.woff2 — 0 B — 0 ms — font-display: swap
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 35 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
flUhRq6tzZclQEJ-Vdg-Iui... woff2 swap
Size 126 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
tDbV2o-flEEny0FZhsfKu5W... woff2 swap
Size 40 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 35 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
L0x5DF4xlVMF-BfR8bXMIjh... woff2 swap
Size 32 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 0 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)

Fixing the unchecked items could save ~63 KB and ~126 ms

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
5 hints, 0 missing preconnects
PASS
5 hints, 0 missing preconnects
Info::
Page uses 5 resource hint(s)

Current Resource Hints

preconnect
5
preload
—
dns-prefetch
—
prefetch
—

5 resource hints configured

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

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

Network Waterfall
117 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
75% of JavaScript execution is third-party
First-party Third-party 4777ms · 924KB · €76/mo
Unattributable
Other
Costly
Execution 1865ms
Transfer 0 KB
Monthly Cost €30/mo
www.gstatic.com
Other
Costly
Execution 602ms
Transfer 58 KB
Unused 47%
Monthly Cost €10/mo
www.gstatic.com
Other
Costly
Execution 419ms
Transfer 0 KB
Unused 52%
Monthly Cost €7/mo
Google Tag Manager
Tag Manager
Costly
Execution 397ms
Transfer 139 KB
Unused 44%
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 321ms
Transfer 147 KB
Unused 40%
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 315ms
Transfer 154 KB
Unused 55%
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 305ms
Transfer 142 KB
Unused 42%
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 256ms
Transfer 129 KB
Unused 47%
Monthly Cost €4/mo
www.gstatic.com
Other
Optional
Execution 117ms
Transfer 0 KB
Monthly Cost €2/mo
www.gstatic.com
Other
Optional
Execution 99ms
Transfer 0 KB
Monthly Cost €2/mo
www.gstatic.com
Other
Optional
Execution 80ms
Transfer 154 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 1865ms and costs ~€30/month
  • www.gstatic.com adds 602ms and costs ~€10/month
  • www.gstatic.com adds 419ms and costs ~€7/month
  • Google Tag Manager adds 397ms and costs ~€6/month
  • Google Tag Manager adds 321ms and costs ~€5/month
  • Google Tag Manager adds 315ms and costs ~€5/month
  • Google Tag Manager adds 305ms and costs ~€5/month
  • Google Tag Manager adds 256ms and costs ~€4/month

75% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

Unattributable takes 1865ms 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.gstatic.com takes 602ms 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.gstatic.com takes 419ms 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

52% of www.gstatic.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 397ms 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 321ms 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 315ms 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

55% 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

Google Tag Manager takes 305ms 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 256ms 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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