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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
2
REVIEW
6
PASS
5
INFO
2

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

Mobile Desktop
88
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
77
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
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.

1.07 s

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

1.95 s

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

63 ms

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

0.002

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

1.34 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.

1.96 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
15
5 PASS 6 REVIEW 2 FIX
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 (1.9 MiB of 1.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
126 resources · 1.9 MB · 104 KB savings available
FIX
126 resources · 1.9 MB · 104 KB savings available
Warning::
Page weight 959 KB over 1MB target
Got: 1.9 MB Expected: ≤ 1 MB
Info::
~104 KB of savings available
Warning::
125 third-party resources (100% of weight)
126 resources · 1.9 MiB · 125 third-party 958.5 KiB over 1MB target
Image 57% · 1.1 MiB
JavaScript 27% · 525.7 KiB
Font 13% · 254.5 KiB
Document 2% · 39.9 KiB
CSS 1% · 22.6 KiB
Other 0% · 1.6 KiB

~104.3 KiB of savings available

Remove unused JavaScript: 104.3 KiB
C
Page Weight Budget
Action
1.9 MB transferred, 126 requests
REVIEW
1.9 MB transferred, 126 requests
Info::
Page weighs 3.3 MB (1.9 MB transferred)
Warning::
Images are 1.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.1 MB
Warning::
JavaScript is 526 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 526 KB
Info::
Fonts are 255 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 255 KB
Warning::
126 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.41 g CO2 per page load
1.9 MB / 2.4 MB budget
1.9 MB transferred
126 requests
0.41 g CO2 per page load
Images 1.1 MiB 57%
JavaScript 525.7 KiB 27%
Fonts 254.5 KiB 13%
HTML 39.6 KiB 2%
CSS 22.6 KiB 1%
Other 2.0 KiB 0%
Other 1.8 KiB 0%
Other 156 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

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

B
Image Optimization
31 images, 0 KB saveable
REVIEW
31 images, 0 KB saveable
Info::
All images are well-optimized
31 images 1.1 MB
0 oversized -0 KB
11 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
854ms total JS execution
REVIEW
854ms total JS execution
Warning::
https://assets.blurb.com/_astro/BaseHead.astro_ast...: 321ms CPU time
Warning::
Unattributable: 271ms CPU time
Info::
https://www.blurb.com/: 210ms CPU time
Info::
https://cmp.osano.com/16A03oT68BUAr9x2X/c0b3844c-7...: 51ms CPU time
Warning::
Third-party scripts: 854ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Other 34% Style & Layout 9%
ScriptTotalScriptingParse/CompileParty
https://assets.blurb.com/_astro/BaseHead.astro_astro_type_script_index_0_lang.DTOPfZKw.js321ms300ms0ms3rd
Unattributable271ms43ms0ms3rd
https://www.blurb.com/210ms50ms4ms3rd
https://cmp.osano.com/16A03oT68BUAr9x2X/c0b3844c-744e-425e-acc1-189cbcdcdb86/osano.js51ms33ms0ms3rd
B
JS Bundles
70 scripts, 104 KB unused
REVIEW
70 scripts, 104 KB unused
Warning::
https://cdn.optimizely.com/js/2513470821.js: 50 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.blurb.com/_astro/ReactIcon.CLyEU9Cp...: 32 KB unused (85%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cmp.osano.com/16A03oT68BUAr9x2X/c0b3844c-7...: 22 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 104 KB
104 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.optimizely.com/js/2513470821.js130 KB50 KB (39%)✓3rd
https://assets.blurb.com/_astro/ReactIcon.CLyEU9Cp.js38 KB32 KB (85%)✓3rd
https://cmp.osano.com/16A03oT68BUAr9x2X/c0b3844c-744e-425e-acc1-189cbcdcdb86/osano.js64 KB22 KB (34%)✓3rd
https://assets.blurb.com/_astro/BaseHead.astro_astro_type_script_index_0_lang.DTOPfZKw.js20 KB—✓3rd
https://assets.blurb.com/_astro/BaseHead.astro_astro_type_script_index_1_lang.Cuie9Elm.js0 KB—✓3rd
https://assets.blurb.com/_astro/BaseHead.astro_astro_type_script_index_2_lang.BZUdC0VX.js0 KB—✓3rd
https://assets.blurb.com/_astro/NavDesktop.astro_astro_type_script_index_0_lang.DhA9CHHm.js2 KB—✓3rd
https://assets.blurb.com/_astro/CategoryCarousel.astro_astro_type_script_index_0_lang.wqqEfIgN.js0 KB—✓3rd
https://assets.blurb.com/_astro/EmailCapture.astro_astro_type_script_index_0_lang.D6uESPb3.js0 KB—✓3rd
https://assets.blurb.com/_astro/ShowcaseCard.astro_astro_type_script_index_0_lang.wqqEfIgN.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

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+
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
11 fonts (255 KB)
PASS
11 fonts (255 KB)
Info::
11 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

11

255 KB total

Render-blocking

0

of 11

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.1 s LCP 2.0 shttps://assets.blurb.com/_astro/fonts/19328e3f43ab4ed2.woff219328e3f43ab4ed2.woff2 https://assets.blurb.com/_astro/fonts/19328e3f43ab4ed2.woff2 — 46.3 KiB — 80 ms — font-display: swaphttps://assets.blurb.com/_astro/fonts/045346bd8370b80a.woff2045346bd8370b80a.woff2 https://assets.blurb.com/_astro/fonts/045346bd8370b80a.woff2 — 48.2 KiB — 84 ms — font-display: swaphttps://assets.blurb.com/_astro/fonts/902c6ec6193b5f43.woff2902c6ec6193b5f43.woff2 https://assets.blurb.com/_astro/fonts/902c6ec6193b5f43.woff2 — 19.4 KiB — 51 ms — font-display: swaphttps://assets.blurb.com/_astro/fonts/18fadc50cce629f8.woff218fadc50cce629f8.woff2 https://assets.blurb.com/_astro/fonts/18fadc50cce629f8.woff2 — 17.0 KiB — 38 ms — font-display: swaphttps://assets.blurb.com/_astro/fonts/a146fd340009b27e.woff2a146fd340009b27e.woff2 https://assets.blurb.com/_astro/fonts/a146fd340009b27e.woff2 — 19.3 KiB — 57 ms — font-display: swaphttps://assets.blurb.com/_astro/fonts/400006e4c98b5bb1.woff2400006e4c98b5bb1.woff2 https://assets.blurb.com/_astro/fonts/400006e4c98b5bb1.woff2 — 16.7 KiB — 81 ms — font-display: swaphttps://assets.blurb.com/_astro/fonts/d014358d8cbbedf7.woff2d014358d8cbbedf7.woff2 https://assets.blurb.com/_astro/fonts/d014358d8cbbedf7.woff2 — 18.1 KiB — 76 ms — font-display: swaphttps://assets.blurb.com/_astro/fonts/9e5f165193baf73b.woff29e5f165193baf73b.woff2 https://assets.blurb.com/_astro/fonts/9e5f165193baf73b.woff2 — 16.7 KiB — 80 ms — font-display: swaphttps://assets.blurb.com/_astro/fonts/13f5fa199b3bdce3.woff213f5fa199b3bdce3.woff2 https://assets.blurb.com/_astro/fonts/13f5fa199b3bdce3.woff2 — 18.7 KiB — 76 ms — font-display: swaphttps://assets.blurb.com/_astro/fonts/a587ff669d60ac38.woff2a587ff669d60ac38.woff2 https://assets.blurb.com/_astro/fonts/a587ff669d60ac38.woff2 — 16.9 KiB — 74 ms — font-display: swaphttps://assets.blurb.com/_astro/fonts/a87b9a3b44d0eaa2.woff2a87b9a3b44d0eaa2.woff2 https://assets.blurb.com/_astro/fonts/a87b9a3b44d0eaa2.woff2 — 17.3 KiB — 58 ms — font-display: swap
19328e3f43ab4ed2.woff2 woff2 swap
Size 46 KB
Load time 80 ms
Start 184 ms
Risk FOUT — text flashes from fallback to web font
045346bd8370b80a.woff2 woff2 swap
Size 48 KB
Load time 84 ms
Start 185 ms
Risk FOUT — text flashes from fallback to web font
902c6ec6193b5f43.woff2 woff2 swap
Size 19 KB
Load time 51 ms
Start 186 ms
Risk FOUT — text flashes from fallback to web font
18fadc50cce629f8.woff2 woff2 swap
Size 17 KB
Load time 38 ms
Start 187 ms
Risk FOUT — text flashes from fallback to web font
a146fd340009b27e.woff2 woff2 swap
Size 19 KB
Load time 57 ms
Start 187 ms
Risk FOUT — text flashes from fallback to web font
400006e4c98b5bb1.woff2 woff2 swap
Size 17 KB
Load time 81 ms
Start 187 ms
Risk FOUT — text flashes from fallback to web font
d014358d8cbbedf7.woff2 woff2 swap
Size 18 KB
Load time 76 ms
Start 189 ms
Risk FOUT — text flashes from fallback to web font
9e5f165193baf73b.woff2 woff2 swap
Size 17 KB
Load time 80 ms
Start 189 ms
Risk FOUT — text flashes from fallback to web font
13f5fa199b3bdce3.woff2 woff2 swap
Size 19 KB
Load time 76 ms
Start 189 ms
Risk FOUT — text flashes from fallback to web font
a587ff669d60ac38.woff2 woff2 swap
Size 17 KB
Load time 74 ms
Start 190 ms
Risk FOUT — text flashes from fallback to web font
a87b9a3b44d0eaa2.woff2 woff2 swap
Size 17 KB
Load time 58 ms
Start 190 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
126 requests over 1698ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.1 s LCP 2.0 shttps://blurb.com// https://blurb.com/ — 301 — 325 B — 79 ms — http/1.1https://www.blurb.com/www.blurb.com/ https://www.blurb.com/ — 200 — 38.2 KiB — 92 ms — http/1.1https://assets.blurb.com/_astro/BaseHead.astro_astro_type_script_index_0_lang.DTOPfZKw.jsassets.blurb.com/_astro/BaseHead.as... https://assets.blurb.com/_astro/BaseHead.astro_astro_type_script_index_0_lang.DTOPfZKw.js — 200 — 20.2 KiB — 38 ms — h2https://assets.blurb.com/_astro/BaseHead.astro_astro_type_script_index_1_lang.Cuie9Elm.jsassets.blurb.com/_astro/BaseHead.as... https://assets.blurb.com/_astro/BaseHead.astro_astro_type_script_index_1_lang.Cuie9Elm.js — 200 — 420 B — 36 ms — h2https://assets.blurb.com/_astro/fonts/19328e3f43ab4ed2.woff2assets.blurb.com/_astro/fonts/19328... https://assets.blurb.com/_astro/fonts/19328e3f43ab4ed2.woff2 — 200 — 46.3 KiB — 80 ms — h2https://assets.blurb.com/_astro/fonts/045346bd8370b80a.woff2assets.blurb.com/_astro/fonts/04534... https://assets.blurb.com/_astro/fonts/045346bd8370b80a.woff2 — 200 — 48.2 KiB — 84 ms — h2https://assets.blurb.com/_astro/fonts/902c6ec6193b5f43.woff2assets.blurb.com/_astro/fonts/902c6... https://assets.blurb.com/_astro/fonts/902c6ec6193b5f43.woff2 — 200 — 19.4 KiB — 51 ms — h2https://assets.blurb.com/_astro/fonts/18fadc50cce629f8.woff2assets.blurb.com/_astro/fonts/18fad... https://assets.blurb.com/_astro/fonts/18fadc50cce629f8.woff2 — 200 — 17.0 KiB — 38 ms — h2https://assets.blurb.com/_astro/fonts/a146fd340009b27e.woff2assets.blurb.com/_astro/fonts/a146f... https://assets.blurb.com/_astro/fonts/a146fd340009b27e.woff2 — 200 — 19.3 KiB — 57 ms — h2https://assets.blurb.com/_astro/fonts/400006e4c98b5bb1.woff2assets.blurb.com/_astro/fonts/40000... https://assets.blurb.com/_astro/fonts/400006e4c98b5bb1.woff2 — 200 — 16.7 KiB — 81 ms — h2https://assets.blurb.com/_astro/fonts/d014358d8cbbedf7.woff2assets.blurb.com/_astro/fonts/d0143... https://assets.blurb.com/_astro/fonts/d014358d8cbbedf7.woff2 — 200 — 18.1 KiB — 76 ms — h2https://assets.blurb.com/_astro/fonts/9e5f165193baf73b.woff2assets.blurb.com/_astro/fonts/9e5f1... https://assets.blurb.com/_astro/fonts/9e5f165193baf73b.woff2 — 200 — 16.7 KiB — 80 ms — h2https://assets.blurb.com/_astro/fonts/13f5fa199b3bdce3.woff2assets.blurb.com/_astro/fonts/13f5f... https://assets.blurb.com/_astro/fonts/13f5fa199b3bdce3.woff2 — 200 — 18.7 KiB — 76 ms — h2https://assets.blurb.com/_astro/fonts/a587ff669d60ac38.woff2assets.blurb.com/_astro/fonts/a587f... https://assets.blurb.com/_astro/fonts/a587ff669d60ac38.woff2 — 200 — 16.9 KiB — 74 ms — h2https://assets.blurb.com/_astro/fonts/a87b9a3b44d0eaa2.woff2assets.blurb.com/_astro/fonts/a87b9... https://assets.blurb.com/_astro/fonts/a87b9a3b44d0eaa2.woff2 — 200 — 17.3 KiB — 58 ms — h2https://fonts.googleapis.com/css2?family=Just+Another+Hand&display=swapfonts.googleapis.com/css2?family=Ju... https://fonts.googleapis.com/css2?family=Just+Another+Hand&display=swap — 200 — 881 B — 100 ms — h2https://assets.blurb.com/_astro/BaseHead.astro_astro_type_script_index_2_lang.BZUdC0VX.jsassets.blurb.com/_astro/BaseHead.as... https://assets.blurb.com/_astro/BaseHead.astro_astro_type_script_index_2_lang.BZUdC0VX.js — 200 — 303 B — 72 ms — h2https://assets.blurb.com/_astro/index.Dv94Qiwt.cssassets.blurb.com/_astro/index.Dv94Q... https://assets.blurb.com/_astro/index.Dv94Qiwt.css — 200 — 21.7 KiB — 41 ms — h2https://assets.blurb.com/_astro/NavDesktop.astro_astro_type_script_index_0_lang.DhA9CHHm.jsassets.blurb.com/_astro/NavDesktop.... https://assets.blurb.com/_astro/NavDesktop.astro_astro_type_script_index_0_lang.DhA9CHHm.js — 200 — 1.6 KiB — 72 ms — h2https://assets.blurb.com/_astro/CategoryCarousel.astro_astro_type_script_index_0_lang.wqqEfIgN.jsassets.blurb.com/_astro/CategoryCar... https://assets.blurb.com/_astro/CategoryCarousel.astro_astro_type_script_index_0_lang.wqqEfIgN.js — 200 — 325 B — 71 ms — h2https://assets.blurb.com/_astro/EmailCapture.astro_astro_type_script_index_0_lang.D6uESPb3.jsassets.blurb.com/_astro/EmailCaptur... https://assets.blurb.com/_astro/EmailCapture.astro_astro_type_script_index_0_lang.D6uESPb3.js — 200 — 283 B — 75 ms — h2https://assets.blurb.com/_astro/ShowcaseCard.astro_astro_type_script_index_0_lang.wqqEfIgN.jsassets.blurb.com/_astro/ShowcaseCar... https://assets.blurb.com/_astro/ShowcaseCard.astro_astro_type_script_index_0_lang.wqqEfIgN.js — 200 — 327 B — 70 ms — h2https://assets.blurb.com/_astro/BaseLayout.astro_astro_type_script_index_0_lang.CMbpc746.jsassets.blurb.com/_astro/BaseLayout.... https://assets.blurb.com/_astro/BaseLayout.astro_astro_type_script_index_0_lang.CMbpc746.js — 200 — 554 B — 72 ms — h2https://cdn.optimizely.com/js/2513470821.jscdn.optimizely.com/js/2513470821.js https://cdn.optimizely.com/js/2513470821.js — 200 — 130.1 KiB — 82 ms — h2https://assets.blurb.com/_astro/preload-helper.BlTxHScW.jsassets.blurb.com/_astro/preload-hel... https://assets.blurb.com/_astro/preload-helper.BlTxHScW.js — 200 — 796 B — 37 ms — h2https://assets.blurb.com/_astro/flag_us.DI1oXf61.svgassets.blurb.com/_astro/flag_us.DI1... https://assets.blurb.com/_astro/flag_us.DI1oXf61.svg — 200 — 1.3 KiB — 9 ms — h2https://assets.blurb.com/_astro/flag_australia.BpCZtgID.svgassets.blurb.com/_astro/flag_austra... https://assets.blurb.com/_astro/flag_australia.BpCZtgID.svg — 200 — 85.8 KiB — 46 ms — h2https://assets.blurb.com/_astro/flag_portugal.CRUH3iMu.svgassets.blurb.com/_astro/flag_portug... https://assets.blurb.com/_astro/flag_portugal.CRUH3iMu.svg — 200 — 4.8 KiB — 26 ms — h2https://assets.blurb.com/_astro/flag_netherlands.rKYC6362.svgassets.blurb.com/_astro/flag_nether... https://assets.blurb.com/_astro/flag_netherlands.rKYC6362.svg — 200 — 570 B — 15 ms — h2https://assets.blurb.com/_astro/flag_italy.Ce0ovv1D.svgassets.blurb.com/_astro/flag_italy.... https://assets.blurb.com/_astro/flag_italy.Ce0ovv1D.svg — 200 — 558 B — 11 ms — h2
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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 854ms · 122KB · $16/mo
assets.blurb.com
Other
Costly
Execution 321ms
Transfer 20 KB
Monthly Cost $6/mo
Unattributable
Other
Costly
Execution 271ms
Transfer 0 KB
Monthly Cost $5/mo
www.blurb.com
Other
Costly
Execution 210ms
Transfer 38 KB
Monthly Cost $4/mo
cmp.osano.com
Other
Optional
Execution 51ms
Transfer 64 KB
Unused 34%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • assets.blurb.com adds 321ms and costs ~$6/month
  • Unattributable adds 271ms and costs ~$5/month
  • www.blurb.com adds 210ms 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

assets.blurb.com 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

Unattributable takes 271ms 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.blurb.com takes 210ms 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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