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https://brooklinen.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
1
PASS
6
INFO
2

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

Mobile Desktop
30
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.

1.55 s

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

5.57 s

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

979 ms

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

0.104

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

7.65 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.

11.89 s

Page Load Progression

2.1 s
4.2 s
6.3 s
8.4 s
10.4 s
12.5 s
14.6 s
16.7 s
Checks
14
6 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
26.4 MB transferred, 726 requests
FIX
26.4 MB transferred, 726 requests
Critical::
Page weighs 40.2 MB (26.4 MB transferred)
Warning::
JavaScript is 4.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 4.0 MB
Warning::
Images are 1.9 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.9 MB
Info::
Fonts are 257 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 257 KB
Warning::
726 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 5.5 g CO2 per page load
26.4 MB / 2.4 MB budget
26.4 MB transferred
726 requests
5.5 g CO2 per page load
Other 18.1 MiB 69%
JavaScript 4.0 MiB 15%
Images 1.9 MiB 7%
Other 1.0 MiB 4%
HTML 774.3 KiB 3%
Other 294.0 KiB 1%
Fonts 257.0 KiB 1%
CSS 111.2 KiB 0%
Other 31.1 KiB 0%
Other 21.1 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (26.4 MiB of 26.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
9112ms total JS execution
FIX
9112ms total JS execution
Warning::
Unattributable: 1421ms CPU time
Warning::
https://t.contentsquare.net/uxa/ea6942bbd7cb0.js: 986ms CPU time
Warning::
https://www.brooklinen.com/cdn/shop/t/4417/assets/...: 652ms CPU time
Warning::
https://www.brooklinen.com/cdn/shop/t/4417/assets/...: 590ms CPU time
Warning::
https://www.brooklinen.com/: 586ms CPU time
Warning::
Third-party scripts: 9112ms (100% of total)

Main Thread Breakdown

Script Evaluation 62% Other 22% Style & Layout 8% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
Unattributable1421ms127ms0ms3rd
https://t.contentsquare.net/uxa/ea6942bbd7cb0.js986ms880ms16ms3rd
https://www.brooklinen.com/cdn/shop/t/4417/assets/ProductModal-166a90f8.js652ms437ms1ms3rd
https://www.brooklinen.com/cdn/shop/t/4417/assets/splide.esm-688b6f4b.js590ms148ms0ms3rd
https://www.brooklinen.com/586ms88ms69ms3rd
https://cdn.dynamicyield.com/api/8768435/api_static.js571ms355ms11ms3rd
https://www.brooklinen.com/cdn/shop/t/4417/assets/brooklinen-theme.js?v=169145595473704288901775593102540ms373ms0ms3rd
https://st.dynamicyield.com/st?sec=8768435&ref=&scriptVersion=2.83.0&inHead=true&id=0&jsession=wxi6xhvtwdo5a0bfoj8gdxidcffytoqp&isSesNew=true&landingUrl=www.brooklinen.com&dyid_server=0&ctx=%7B%22type%22%3A%22HOMEPAGE%22%7D469ms397ms4ms3rd
https://www.brooklinen.com/cdn/wpm/b0e8c7c7aw41bd75a1p837d7fd4m8b145375m.js457ms430ms4ms3rd
https://www.brooklinen.com/cdn/shop/t/4417/assets/global-functions-77fa5d7f.js389ms58ms0ms3rd

Showing top 10 of 26 scripts

F
JS Bundles
Action
230 scripts, 1.4 MB unused
FIX
230 scripts, 1.4 MB unused
Warning::
https://sdk.postscript.io/sdk.bundle.js?shopId=166...: 145 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-973...: 102 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.dynamicyield.com/api/8768435/api_stati...: 91 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://2b36d2a1092a.cdn4.forter.com/sn/2b36d2a109...: 89 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://accounts.google.com/gsi/client: 67 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.4 MB
1428 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://sdk.postscript.io/sdk.bundle.js?shopId=1664202 KB145 KB (72%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-973522331137 KB102 KB (75%)✓3rd
https://cdn.dynamicyield.com/api/8768435/api_static.js158 KB91 KB (58%)✓3rd
https://2b36d2a1092a.cdn4.forter.com/sn/2b36d2a1092a/script.js215 KB89 KB (42%)✓3rd
https://accounts.google.com/gsi/client93 KB67 KB (72%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-80JGCF4NMJ&cx=c&gtm=4e6461173 KB64 KB (37%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=DC-11096279&cx=c&gtm=4e6461130 KB59 KB (46%)✓3rd
https://t.contentsquare.net/uxa/ea6942bbd7cb0.js132 KB59 KB (45%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N3WBV32177 KB58 KB (33%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-930458877143 KB58 KB (40%)✓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

D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
max-age0Cache for 0 seconds
no-store—Never cache this response
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
post-check0
pre-check0
B
Image Optimization
132 images, 0 KB saveable
REVIEW
132 images, 0 KB saveable
Info::
All images are well-optimized
132 images 1.9 MB
0 oversized -0 KB
23 legacy format
0 missing dimensions CLS risk
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
9 fonts (327 KB)
PASS
9 fonts (327 KB)
Info::
9 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

9

327 KB total

Render-blocking

0

of 9

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 1.6 s LCP 5.6 shttps://www.brooklinen.com/cdn/shop/files/f__BrandonTextRegular.woff2?v=2923255800735255676f__BrandonTextRegular.w... https://www.brooklinen.com/cdn/shop/files/f__BrandonTextRegular.woff2?v=2923255800735255676 — 34.4 KiB — 0 ms — font-display: swaphttps://www.brooklinen.com/cdn/shop/files/wf_BrandonTextWeb-Medium--360967_B_0.woff2?v=18048165408412969505wf_BrandonTextWeb-Mediu... https://www.brooklinen.com/cdn/shop/files/wf_BrandonTextWeb-Medium--360967_B_0.woff2?v=18048165408412969505 — 33.0 KiB — 0 ms — font-display: swaphttps://www.brooklinen.com/cdn/shop/files/f__BrandonTextBold.woff2?v=9945025441678652657f__BrandonTextBold.woff2 https://www.brooklinen.com/cdn/shop/files/f__BrandonTextBold.woff2?v=9945025441678652657 — 35.6 KiB — 0 ms — font-display: swaphttps://www.brooklinen.com/cdn/shop/files/f__BrandonTextWeb-Italic--360967_8_0.woff2?v=13318003604299643776f__BrandonTextWeb-Itali... https://www.brooklinen.com/cdn/shop/files/f__BrandonTextWeb-Italic--360967_8_0.woff2?v=13318003604299643776 — 33.2 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/0951/7126/files/ToledoSerial-Bold.otf?v=1751402923ToledoSerial-Bold.otf https://cdn.shopify.com/s/files/1/0951/7126/files/ToledoSerial-Bold.otf?v=1751402923 — 28.9 KiB — 0 ms — font-display: swaphttps://www.brooklinen.com/cdn/shop/files/ToledoSerial-Bold.otf?v=1751402923ToledoSerial-Bold.otf https://www.brooklinen.com/cdn/shop/files/ToledoSerial-Bold.otf?v=1751402923 — 28.8 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/shop-assets/static_uploads/shoplift/GTStandard-MRegular.woff2GTStandard-MRegular.woff2 https://cdn.shopify.com/shop-assets/static_uploads/shoplift/GTStandard-MRegular.woff2 — 63.2 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/0951/7126/files/f__BrandonTextRegular.woff2?v=1713457452f__BrandonTextRegular.w... https://cdn.shopify.com/s/files/1/0951/7126/files/f__BrandonTextRegular.woff2?v=1713457452 — 34.7 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/0951/7126/files/f__BrandonTextBold.woff2?v=1713457452f__BrandonTextBold.woff2 https://cdn.shopify.com/s/files/1/0951/7126/files/f__BrandonTextBold.woff2?v=1713457452 — 35.6 KiB — 0 ms — font-display: swap
f__BrandonTextRegular.w... woff2 swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
wf_BrandonTextWeb-Mediu... woff2 swap
Size 33 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
f__BrandonTextBold.woff2 woff2 swap
Size 36 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
f__BrandonTextWeb-Itali... woff2 swap
Size 33 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
ToledoSerial-Bold.otf otf swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
ToledoSerial-Bold.otf otf swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
GTStandard-MRegular.woff2 woff2 swap
Size 63 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
f__BrandonTextRegular.w... woff2 swap
Size 35 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
f__BrandonTextBold.woff2 woff2 swap
Size 36 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 ~17 KB and ~34 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
726 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 9112ms · 2179KB · €48/mo
Unattributable
Other
Costly
Execution 1421ms
Transfer 0 KB
Monthly Cost €8/mo
t.contentsquare.net
Other
Costly
Execution 986ms
Transfer 132 KB
Unused 45%
Monthly Cost €5/mo
www.brooklinen.com
Other
Costly
Execution 652ms
Transfer 129 KB
Unused 42%
Monthly Cost €3/mo
www.brooklinen.com
Other
Costly
Execution 590ms
Transfer 14 KB
Monthly Cost €3/mo
www.brooklinen.com
Other
Costly
Execution 586ms
Transfer 108 KB
Monthly Cost €3/mo
cdn.dynamicyield.com
Other
Costly
Execution 571ms
Transfer 158 KB
Unused 58%
Monthly Cost €3/mo
www.brooklinen.com
Other
Costly
Execution 540ms
Transfer 41 KB
Unused 55%
Monthly Cost €3/mo
st.dynamicyield.com
Other
Costly
Execution 469ms
Transfer 6 KB
Monthly Cost €2/mo
www.brooklinen.com
Other
Costly
Execution 457ms
Transfer 61 KB
Unused 39%
Monthly Cost €2/mo
www.brooklinen.com
Other
Costly
Execution 389ms
Transfer 5 KB
Monthly Cost €2/mo
rapid-cdn.yottaa.com
Other
Costly
Execution 332ms
Transfer 45 KB
Unused 61%
Monthly Cost €2/mo
cdn.us.heap-api.com
Other
Costly
Execution 296ms
Transfer 82 KB
Unused 41%
Monthly Cost €2/mo
static-resources.botnot.io
Other
Costly
Execution 220ms
Transfer 50 KB
Monthly Cost €1/mo
2b36d2a1092a.cdn4.forter.com
Other
Costly
Execution 216ms
Transfer 215 KB
Unused 42%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 198ms
Transfer 143 KB
Unused 40%
Monthly Cost €1/mo
cdn.shopify.com
Other
Optional
Execution 188ms
Transfer 1 KB
Unused 60%
Monthly Cost €1/mo
www.redditstatic.com
Other
Optional
Execution 164ms
Transfer 19 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 146ms
Transfer 177 KB
Unused 33%
Monthly Cost €1/mo
d38xvr37kwwhcm.cloudfront.net
Other
Optional
Execution 128ms
Transfer 16 KB
Monthly Cost €1/mo
sdk.postscript.io
Other
Optional
Execution 109ms
Transfer 202 KB
Unused 72%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 108ms
Transfer 173 KB
Unused 37%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 84ms
Transfer 137 KB
Unused 39%
Monthly Cost €0/mo
sc-static.net
Other
Optional
Execution 74ms
Transfer 25 KB
Monthly Cost €0/mo
brooklinen2.myshopify.com
Other
Optional
Execution 68ms
Transfer 1 KB
Monthly Cost €0/mo
analytics.tiktok.com
Other
Optional
Execution 63ms
Transfer 110 KB
Unused 51%
Monthly Cost €0/mo
Google Tag Manager
Tag Manager
Optional
Execution 55ms
Transfer 130 KB
Unused 46%
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • Unattributable adds 1421ms and costs ~€8/month
  • t.contentsquare.net adds 986ms and costs ~€5/month
  • www.brooklinen.com adds 652ms and costs ~€3/month
  • www.brooklinen.com adds 590ms and costs ~€3/month
  • www.brooklinen.com adds 586ms and costs ~€3/month
  • cdn.dynamicyield.com adds 571ms and costs ~€3/month
  • www.brooklinen.com adds 540ms and costs ~€3/month
  • st.dynamicyield.com adds 469ms and costs ~€2/month
  • www.brooklinen.com adds 457ms and costs ~€2/month
  • www.brooklinen.com adds 389ms and costs ~€2/month
  • rapid-cdn.yottaa.com adds 332ms and costs ~€2/month
  • cdn.us.heap-api.com adds 296ms and costs ~€2/month
  • static-resources.botnot.io adds 220ms and costs ~€1/month
  • 2b36d2a1092a.cdn4.forter.com adds 216ms and costs ~€1/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

Unattributable takes 1421ms 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

t.contentsquare.net takes 986ms 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.brooklinen.com takes 652ms 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.brooklinen.com takes 590ms 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.brooklinen.com takes 586ms 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.dynamicyield.com takes 571ms 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

58% of cdn.dynamicyield.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

www.brooklinen.com takes 540ms 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 www.brooklinen.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

st.dynamicyield.com takes 469ms 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.brooklinen.com takes 457ms 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.brooklinen.com takes 389ms 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

rapid-cdn.yottaa.com takes 332ms 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

61% of rapid-cdn.yottaa.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

cdn.us.heap-api.com takes 296ms 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

static-resources.botnot.io takes 220ms 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

2b36d2a1092a.cdn4.forter.com takes 216ms 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 cdn.shopify.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

72% of sdk.postscript.io'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

51% 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

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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