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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
38
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

3.57 s

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

34.06 s

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

1.26 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.

6.47 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.

34.53 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
17
8 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
5.8 MB transferred, 40 requests
FIX
5.8 MB transferred, 40 requests
Critical::
Page weighs 7.8 MB (5.8 MB transferred)
Warning::
JavaScript is 3.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.6 MB
Warning::
Images are 1.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.7 MB
Info::
CSS is 454 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 454 KB
Info::
40 HTTP requests
Info::
Estimated 1.2 g CO2 per page load
5.8 MB / 2.4 MB budget
5.8 MB transferred
40 requests
1.2 g CO2 per page load
JavaScript 3.6 MiB 62%
Images 1.7 MiB 29%
CSS 454.0 KiB 8%
Fonts 39.5 KiB 1%
HTML 12.4 KiB 0%
Other 2.6 KiB 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

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

D
JS Execution Cost
Action
2135ms total JS execution
FIX
2135ms total JS execution
Warning::
https://zenodo.org/static/dist/js/base-theme-rdm.8...: 756ms CPU time
Warning::
https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2...: 463ms CPU time
Warning::
Unattributable: 280ms CPU time
Warning::
https://zenodo.org/: 255ms CPU time
Info::
https://zenodo.org/static/dist/js/zenodo-rdm-commu...: 160ms CPU time
Info::
Third-party scripts: 743ms (35% of total)

Main Thread Breakdown

Script Evaluation 50% Other 20% Script Parsing & Compilation 17% Style & Layout 7% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://zenodo.org/static/dist/js/base-theme-rdm.8c1a005fb1f90f95a2c6.js756ms754ms2ms1st
https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.js?config=TeX-AMS-MML_HTMLorMML463ms349ms102ms3rd
Unattributable280ms5ms0ms3rd
https://zenodo.org/255ms10ms2ms1st
https://zenodo.org/static/dist/js/zenodo-rdm-communities-carousel.e73a34523857c7369d92.js160ms6ms0ms1st
https://zenodo.org/static/dist/js/1057.a721f4208c91fd46e349.js126ms2ms116ms1st
https://zenodo.org/static/dist/css/3526.496cd2b949c08130e777.css94ms0ms0ms1st
F
JS Bundles
Action
23 scripts, 1.9 MB unused
FIX
23 scripts, 1.9 MB unused
Warning::
https://zenodo.org/static/dist/js/1057.a721f4208c9...: 987 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://zenodo.org/static/dist/js/3526.d2d1858da04...: 244 KB unused (90%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://zenodo.org/static/dist/js/8064.6e912921ea6...: 229 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://zenodo.org/static/dist/js/8871.987bc777996...: 220 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2...: 97 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.9 MB
1956 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://zenodo.org/static/dist/js/1057.a721f4208c91fd46e349.js1286 KB987 KB (77%)✓1st
https://zenodo.org/static/dist/js/3526.d2d1858da044613c6154.js271 KB244 KB (90%)✓1st
https://zenodo.org/static/dist/js/8064.6e912921ea6918de776d.js363 KB229 KB (63%)✓1st
https://zenodo.org/static/dist/js/8871.987bc777996af95ba9d4.js294 KB220 KB (75%)✓1st
https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.js?config=TeX-AMS-MML_HTMLorMML201 KB97 KB (49%)✓3rd
https://zenodo.org/static/dist/js/2827.a8bbc0b6614aa6d344c2.js209 KB93 KB (45%)✓1st
https://zenodo.org/static/dist/js/73.eff6d29b79c9412c5335.js86 KB60 KB (71%)✓1st
https://zenodo.org/static/dist/js/5941.579c270a17ef63bbe49f.js32 KB25 KB (81%)✓1st
https://zenodo.org/static/dist/js/5092.a8e9aa3149755c25c425.js15 KB—✓1st
https://zenodo.org/static/dist/js/8118.cc562b5391bb9311e731.js41 KB—✓1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
Page Weight Inventory
Action
40 resources · 5.8 MB · 1.9 MB savings available
FIX
40 resources · 5.8 MB · 1.9 MB savings available
Warning::
Page weight 4.8 MB over 1MB target
Got: 5.8 MB Expected: ≤ 1 MB
Info::
~1.9 MB of savings available
Info::
2 third-party resources (4% of weight)
Info::
12 resources over 200KB
40 resources · 5.8 MiB · 2 third-party 4.8 MiB over 1MB target
JavaScript 62% · 3.6 MiB
Image 29% · 1.7 MiB
CSS 8% · 454.0 KiB
Font 1% · 39.5 KiB
Document 0% · 12.4 KiB

~1.9 MiB of savings available

Remove unused JavaScript: 1.9 MiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
https://zenodo.org/api/communities/f0a8b890-f97a-4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://zenodo.org/static/images/invenio-rdm.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 1.7 MB
0 oversized -0 KB
13 legacy format
2 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
4% third-party, 0 ms blocking
PASS
4% third-party, 0 ms blocking
Info::
Third-party code accounts for 4% of page weight (222.8 KiB of 5.8 MiB)
Info::
Third-party blocking time is low (0 ms)
96%
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
1 fonts (40 KB)
PASS
1 fonts (40 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

40 KB total

Render-blocking

0

of 1

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 FCP 3.6 s LCP 34.1 shttps://zenodo.org/static/dist/fonts/icons.38c6d8b..woff2icons.38c6d8b..woff2 https://zenodo.org/static/dist/fonts/icons.38c6d8b..woff2 — 39.5 KiB — 34 ms — font-display: swap
icons.38c6d8b..woff2 woff2 swap
Size 40 KB
Load time 34 ms
Start 959 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
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
40 requests over 1174ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s FCP 3.6 s LCP 34.1 shttps://zenodo.org// https://zenodo.org/ — 200 — 12.4 KiB — 143 ms — http/1.1https://zenodo.org/static/dist/css/3526.496cd2b949c08130e777.css/static/dist/css/3526.496cd2b949c08... https://zenodo.org/static/dist/css/3526.496cd2b949c08130e777.css — 200 — 454.0 KiB — 193 ms — http/1.1https://zenodo.org/static/images/invenio-rdm.svg/static/images/invenio-rdm.svg https://zenodo.org/static/images/invenio-rdm.svg — 200 — 6.9 KiB — 90 ms — http/1.1https://zenodo.org/api/communities/f0a8b890-f97a-4eb2-9eac-8b8a712d3a6c/logo/api/communities/f0a8b890-f97a-4eb2... https://zenodo.org/api/communities/f0a8b890-f97a-4eb2-9eac-8b8a712d3a6c/logo — 200 — 207.4 KiB — 328 ms — http/1.1https://zenodo.org/api/communities/7a140649-c350-45e3-a41d-eb8f04abd3d6/logo/api/communities/7a140649-c350-45e3... https://zenodo.org/api/communities/7a140649-c350-45e3-a41d-eb8f04abd3d6/logo — 200 — 36.5 KiB — 251 ms — http/1.1https://zenodo.org/api/communities/ee30dbe2-9bc2-4e6f-9739-d459f718c8da/logo/api/communities/ee30dbe2-9bc2-4e6f... https://zenodo.org/api/communities/ee30dbe2-9bc2-4e6f-9739-d459f718c8da/logo — 200 — 106.9 KiB — 487 ms — http/1.1https://zenodo.org/api/communities/c529f97d-f8cb-4c13-a439-9e36891694c2/logo/api/communities/c529f97d-f8cb-4c13... https://zenodo.org/api/communities/c529f97d-f8cb-4c13-a439-9e36891694c2/logo — 200 — 9.4 KiB — 192 ms — http/1.1https://zenodo.org/static/dist/js/manifest.6150a9655207da04b037.js/static/dist/js/manifest.6150a96552... https://zenodo.org/static/dist/js/manifest.6150a9655207da04b037.js — 200 — 4.4 KiB — 48 ms — http/1.1https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.js?config=TeX-AMS-MML_HTMLorMMLcdnjs.cloudflare.com/ajax/libs/math... https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.js?config=TeX-AMS-MML_HTMLorMML — 200 — 200.7 KiB — 113 ms — h2https://zenodo.org/static/dist/js/zenodo-rdm-communities-carousel.e73a34523857c7369d92.js/static/dist/js/zenodo-rdm-communit... https://zenodo.org/static/dist/js/zenodo-rdm-communities-carousel.e73a34523857c7369d92.js — 200 — 2.4 KiB — 33 ms — http/1.1https://zenodo.org/static/dist/js/73.eff6d29b79c9412c5335.js/static/dist/js/73.eff6d29b79c9412c... https://zenodo.org/static/dist/js/73.eff6d29b79c9412c5335.js — 200 — 85.9 KiB — 94 ms — http/1.1https://zenodo.org/static/dist/js/3526.d2d1858da044613c6154.js/static/dist/js/3526.d2d1858da04461... https://zenodo.org/static/dist/js/3526.d2d1858da044613c6154.js — 200 — 270.6 KiB — 39 ms — http/1.1https://zenodo.org/static/dist/js/theme.46e20d3a883fda8b01b2.js/static/dist/js/theme.46e20d3a883fd... https://zenodo.org/static/dist/js/theme.46e20d3a883fda8b01b2.js — 200 — 2.7 KiB — 34 ms — http/1.1https://zenodo.org/static/dist/js/2827.a8bbc0b6614aa6d344c2.js/static/dist/js/2827.a8bbc0b6614aa6... https://zenodo.org/static/dist/js/2827.a8bbc0b6614aa6d344c2.js — 200 — 208.6 KiB — 66 ms — http/1.1https://zenodo.org/static/dist/js/8064.6e912921ea6918de776d.js/static/dist/js/8064.6e912921ea6918... https://zenodo.org/static/dist/js/8064.6e912921ea6918de776d.js — 200 — 362.8 KiB — 160 ms — http/1.1https://zenodo.org/static/dist/js/1057.a721f4208c91fd46e349.js/static/dist/js/1057.a721f4208c91fd... https://zenodo.org/static/dist/js/1057.a721f4208c91fd46e349.js — 200 — 1.3 MiB — 278 ms — http/1.1https://zenodo.org/static/dist/js/7655.49da91d7c142bad19ccb.js/static/dist/js/7655.49da91d7c142ba... https://zenodo.org/static/dist/js/7655.49da91d7c142bad19ccb.js — 200 — 49.8 KiB — 65 ms — http/1.1https://zenodo.org/static/dist/js/5092.a8e9aa3149755c25c425.js/static/dist/js/5092.a8e9aa3149755c... https://zenodo.org/static/dist/js/5092.a8e9aa3149755c25c425.js — 200 — 15.5 KiB — 35 ms — http/1.1https://zenodo.org/static/dist/js/8871.987bc777996af95ba9d4.js/static/dist/js/8871.987bc777996af9... https://zenodo.org/static/dist/js/8871.987bc777996af95ba9d4.js — 200 — 294.1 KiB — 96 ms — http/1.1https://zenodo.org/static/dist/js/278.8d92f1a6c45c7759d815.js/static/dist/js/278.8d92f1a6c45c775... https://zenodo.org/static/dist/js/278.8d92f1a6c45c7759d815.js — 200 — 27.7 KiB — 41 ms — http/1.1https://zenodo.org/static/dist/js/5941.579c270a17ef63bbe49f.js/static/dist/js/5941.579c270a17ef63... https://zenodo.org/static/dist/js/5941.579c270a17ef63bbe49f.js — 200 — 31.7 KiB — 33 ms — http/1.1https://zenodo.org/static/dist/js/8400.01b33ce9f7568ae61d22.js/static/dist/js/8400.01b33ce9f7568a... https://zenodo.org/static/dist/js/8400.01b33ce9f7568ae61d22.js — 200 — 8.3 KiB — 36 ms — http/1.1https://zenodo.org/static/dist/js/8118.cc562b5391bb9311e731.js/static/dist/js/8118.cc562b5391bb93... https://zenodo.org/static/dist/js/8118.cc562b5391bb9311e731.js — 200 — 41.3 KiB — 34 ms — http/1.1https://zenodo.org/static/dist/js/4157.b89712ff141a054ffdf0.js/static/dist/js/4157.b89712ff141a05... https://zenodo.org/static/dist/js/4157.b89712ff141a054ffdf0.js — 200 — 420.2 KiB — 67 ms — http/1.1https://zenodo.org/static/dist/js/base-theme-rdm.8c1a005fb1f90f95a2c6.js/static/dist/js/base-theme-rdm.8c1a... https://zenodo.org/static/dist/js/base-theme-rdm.8c1a005fb1f90f95a2c6.js — 200 — 19.7 KiB — 36 ms — http/1.1https://zenodo.org/static/dist/js/i18n_app.45ea25224d14a494a50c.js/static/dist/js/i18n_app.45ea25224d... https://zenodo.org/static/dist/js/i18n_app.45ea25224d14a494a50c.js — 200 — 708 B — 34 ms — http/1.1https://zenodo.org/static/dist/js/2301.7b05926e461909740138.js/static/dist/js/2301.7b05926e461909... https://zenodo.org/static/dist/js/2301.7b05926e461909740138.js — 200 — 268.0 KiB — 41 ms — http/1.1https://zenodo.org/static/dist/js/4252.50b9d9c9a0b065bca32e.js/static/dist/js/4252.50b9d9c9a0b065... https://zenodo.org/static/dist/js/4252.50b9d9c9a0b065bca32e.js — 200 — 13.5 KiB — 34 ms — http/1.1https://zenodo.org/static/dist/js/overridable-registry.558ee4947139533ea835.js/static/dist/js/overridable-registr... https://zenodo.org/static/dist/js/overridable-registry.558ee4947139533ea835.js — 200 — 13.1 KiB — 33 ms — http/1.1https://zenodo.org/api/communities/def4b89a-7537-4454-9070-ae33dc22625c/logo/api/communities/def4b89a-7537-4454... https://zenodo.org/api/communities/def4b89a-7537-4454-9070-ae33dc22625c/logo — 200 — 127.5 KiB — 152 ms — http/1.1
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 FCP 3.6 s LCP 34.1 shttps://zenodo.org// https://zenodo.org/ — 200 — 12.4 KiB — 143 ms — http/1.1https://zenodo.org/static/dist/css/3526.496cd2b949c08130e777.css/static/dist/css/3526.496cd2b949c08... https://zenodo.org/static/dist/css/3526.496cd2b949c08130e777.css — 200 — 454.0 KiB — 193 ms — http/1.1https://zenodo.org/static/images/invenio-rdm.svg/static/images/invenio-rdm.svg https://zenodo.org/static/images/invenio-rdm.svg — 200 — 6.9 KiB — 90 ms — http/1.1https://zenodo.org/api/communities/f0a8b890-f97a-4eb2-9eac-8b8a712d3a6c/logo/api/communities/f0a8b890-f97a-4eb2... https://zenodo.org/api/communities/f0a8b890-f97a-4eb2-9eac-8b8a712d3a6c/logo — 200 — 207.4 KiB — 328 ms — http/1.1https://zenodo.org/api/communities/7a140649-c350-45e3-a41d-eb8f04abd3d6/logo/api/communities/7a140649-c350-45e3... https://zenodo.org/api/communities/7a140649-c350-45e3-a41d-eb8f04abd3d6/logo — 200 — 36.5 KiB — 251 ms — http/1.1https://zenodo.org/api/communities/ee30dbe2-9bc2-4e6f-9739-d459f718c8da/logo/api/communities/ee30dbe2-9bc2-4e6f... https://zenodo.org/api/communities/ee30dbe2-9bc2-4e6f-9739-d459f718c8da/logo — 200 — 106.9 KiB — 487 ms — http/1.1https://zenodo.org/api/communities/c529f97d-f8cb-4c13-a439-9e36891694c2/logo/api/communities/c529f97d-f8cb-4c13... https://zenodo.org/api/communities/c529f97d-f8cb-4c13-a439-9e36891694c2/logo — 200 — 9.4 KiB — 192 ms — http/1.1https://zenodo.org/static/dist/js/manifest.6150a9655207da04b037.js/static/dist/js/manifest.6150a96552... https://zenodo.org/static/dist/js/manifest.6150a9655207da04b037.js — 200 — 4.4 KiB — 48 ms — http/1.1https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.js?config=TeX-AMS-MML_HTMLorMMLcdnjs.cloudflare.com/ajax/libs/math... 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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
35% of JavaScript execution is third-party
First-party Third-party 743ms · 201KB · €8/mo
cdnjs
CDN
Costly
Execution 463ms
Transfer 201 KB
Unused 49%
Monthly Cost €5/mo
Unattributable
Other
Costly
Execution 280ms
Transfer 0 KB
Monthly Cost €3/mo

These scripts may cost more than they're worth

  • cdnjs adds 463ms and costs ~€5/month
  • Unattributable adds 280ms and costs ~€3/month

cdnjs takes 463ms 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 280ms 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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