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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
4
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
71
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
74
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.

1.16 s

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

8.12 s

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

0 ms

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.

1.57 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.

8.12 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
6 PASS 3 REVIEW 4 FIX
F
Page Weight Budget
Action
7.9 MB transferred, 70 requests
FIX
7.9 MB transferred, 70 requests
Critical::
Page weighs 9.3 MB (7.9 MB transferred)
Warning::
Images are 7.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 7.3 MB
Info::
70 HTTP requests
Info::
Estimated 1.7 g CO2 per page load
7.9 MB / 2.4 MB budget
7.9 MB transferred
70 requests
1.7 g CO2 per page load
Images 7.3 MiB 92%
JavaScript 416.6 KiB 5%
Fonts 141.5 KiB 2%
CSS 68.9 KiB 1%
Other 26.9 KiB 0%
HTML 13.8 KiB 0%
Other 6.6 KiB 0%
Other 142 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

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 (7.9 MiB of 7.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
70 resources · 7.9 MB · 120 KB savings available
FIX
70 resources · 7.9 MB · 120 KB savings available
Warning::
Page weight 6.9 MB over 1MB target
Got: 7.9 MB Expected: ≤ 1 MB
Info::
~120 KB of savings available
Warning::
66 third-party resources (100% of weight)
Info::
2 resources over 200KB
70 resources · 7.9 MiB · 66 third-party 6.9 MiB over 1MB target
Image 92% · 7.3 MiB
JavaScript 5% · 442.3 KiB
Font 2% · 141.5 KiB
CSS 1% · 68.9 KiB
Document 0% · 13.8 KiB
Other 0% · 142 B

~120.1 KiB of savings available

Remove unused JavaScript: 120.1 KiB
D
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.
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present

No Cache-Control header

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

C
Image Optimization
Action
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Warning::
https://www.crossref.org//img/crossref-logo-revers... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://assets.crossref.org/logo/crossref-logo-200... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
17 images 7.3 MB
0 oversized -0 KB
17 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

B
JS Bundles
31 scripts, 120 KB unused
REVIEW
31 scripts, 120 KB unused
Warning::
https://cdn.matomo.cloud/crossref.matomo.cloud/piw...: 37 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7...: 32 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://resources.usersnap.com/widget-assets/js/en...: 29 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.datatables.net/1.10.16/js/jquery.dataT...: 22 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 120 KB
120 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.matomo.cloud/crossref.matomo.cloud/piwik.js57 KB37 KB (66%)✓3rd
https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/config/TeX-AMS-MML_HTMLorMML.js?V=2.7.159 KB32 KB (55%)✓3rd
https://resources.usersnap.com/widget-assets/js/entries/globalSetup/16705ad555292eaf.js72 KB29 KB (40%)✓3rd
https://cdn.datatables.net/1.10.16/js/jquery.dataTables.min.js26 KB22 KB (83%)✓3rd
https://www.crossref.org//js/bootstrap.min.js10 KB—✓3rd
https://cdnjs.cloudflare.com/ajax/libs/masonry/4.1.0/masonry.pkgd.js14 KB—✗3rd
https://www.crossref.org//js/jquery.ui-min.js8 KB—✓3rd
https://www.crossref.org//js/js.cookie.js2 KB—✓3rd
https://www.crossref.org//js/jquery.cookiebar.js3 KB—✓3rd
https://www.crossref.org//js/jquery.fancybox.js14 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

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

Green Hosting

No green hosting detected

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+
JS Execution Cost
474ms total JS execution
PASS
474ms total JS execution
Warning::
https://crossref.org/: 303ms CPU time
Info::
Unattributable: 117ms CPU time
Info::
https://www.crossref.org//js/jquery.min.js: 54ms CPU time
Info::
Third-party scripts: 171ms (36% of total)

Main Thread Breakdown

Other 44% Script Evaluation 27% Style & Layout 16% Script Parsing & Compilation 6% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://crossref.org/303ms10ms1ms1st
Unattributable117ms10ms0ms3rd
https://www.crossref.org//js/jquery.min.js54ms38ms2ms3rd
A+
Font Loading
5 fonts (141 KB)
PASS
5 fonts (141 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

141 KB total

Render-blocking

0

of 5

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 6.0 s 7.0 s 8.0 s FCP 1.2 s LCP 8.1 shttps://www.crossref.org/css/fonts/Inter-Web/Inter-Regular.woff2Inter-Regular.woff2 https://www.crossref.org/css/fonts/Inter-Web/Inter-Regular.woff2 — 0 B — 303 ms — font-display: swaphttps://www.crossref.org/css/fonts/Inter-Web/Inter-Bold.woff2Inter-Bold.woff2 https://www.crossref.org/css/fonts/Inter-Web/Inter-Bold.woff2 — 0 B — 571 ms — font-display: swaphttps://www.crossref.org/css/fonts/Inter-Web/Inter-Medium.woff2Inter-Medium.woff2 https://www.crossref.org/css/fonts/Inter-Web/Inter-Medium.woff2 — 0 B — 570 ms — font-display: swaphttps://pro.fontawesome.com/releases/v5.7.2/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://pro.fontawesome.com/releases/v5.7.2/webfonts/fa-brands-400.woff2 — 70.7 KiB — 48 ms — font-display: swaphttps://use.fontawesome.com/releases/v4.6.3/fonts/fontawesome-webfont.woff2fontawesome-webfont.woff2 https://use.fontawesome.com/releases/v4.6.3/fonts/fontawesome-webfont.woff2 — 70.8 KiB — 88 ms — font-display: swap
Inter-Regular.woff2 woff2 swap
Size 0 KB
Load time 303 ms
Start 815 ms
Risk FOUT — text flashes from fallback to web font
Inter-Bold.woff2 woff2 swap
Size 0 KB
Load time 571 ms
Start 841 ms
Risk FOUT — text flashes from fallback to web font
Inter-Medium.woff2 woff2 swap
Size 0 KB
Load time 570 ms
Start 841 ms
Risk FOUT — text flashes from fallback to web font
fa-brands-400.woff2 woff2 swap
Size 71 KB
Load time 48 ms
Start 884 ms
Risk FOUT — text flashes from fallback to web font
fontawesome-webfont.woff2 woff2 swap
Size 71 KB
Load time 88 ms
Start 906 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
70 requests over 1798ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 1.2 s LCP 8.1 shttps://crossref.org// https://crossref.org/ — 200 — 8.7 KiB — 300 ms — h2https://pro.fontawesome.com/releases/v5.7.2/css/all.csspro.fontawesome.com/releases/v5.7.2... https://pro.fontawesome.com/releases/v5.7.2/css/all.css — 200 — 16.0 KiB — 81 ms — h2https://www.crossref.org//css/bootstrap.min.csswww.crossref.org//css/bootstrap.min... https://www.crossref.org//css/bootstrap.min.css — 200 — 18.3 KiB — 480 ms — h2https://use.fontawesome.com/1873acdb2d.jsuse.fontawesome.com/1873acdb2d.js https://use.fontawesome.com/1873acdb2d.js — 200 — 4.2 KiB — 79 ms — h2https://cdn.datatables.net/1.10.16/css/jquery.dataTables.min.csscdn.datatables.net/1.10.16/css/jque... https://cdn.datatables.net/1.10.16/css/jquery.dataTables.min.css — 200 — 2.4 KiB — 66 ms — h2https://cdn.datatables.net/buttons/1.5.1/css/buttons.dataTables.min.csscdn.datatables.net/buttons/1.5.1/cs... https://cdn.datatables.net/buttons/1.5.1/css/buttons.dataTables.min.css — 200 — 1.8 KiB — 68 ms — h2https://www.crossref.org//css/syntax.csswww.crossref.org//css/syntax.css https://www.crossref.org//css/syntax.css — 200 — 1.4 KiB — 290 ms — h2https://www.crossref.org/css/crossref.min.05ecfb7355911548d11343a672a95ea3d1320edf72da2de9b776f402bb6bedd3.csswww.crossref.org/css/crossref.min.0... https://www.crossref.org/css/crossref.min.05ecfb7355911548d11343a672a95ea3d1320edf72da2de9b776f402bb6bedd3.css — 200 — 20.7 KiB — 384 ms — h2https://www.crossref.org/css/print.min.5b37715a8e5bdae856e4d3b1fd9d7c8dad0c1d2cee2ed79d6397d375334339ce.csswww.crossref.org/css/print.min.5b37... https://www.crossref.org/css/print.min.5b37715a8e5bdae856e4d3b1fd9d7c8dad0c1d2cee2ed79d6397d375334339ce.css — 200 — 779 B — 476 ms — h2https://cdn.jsdelivr.net/algoliasearch/3/algoliasearch.min.jscdn.jsdelivr.net/algoliasearch/3/al... https://cdn.jsdelivr.net/algoliasearch/3/algoliasearch.min.js — 200 — 19.3 KiB — 13 ms — h2https://cdn.jsdelivr.net/autocomplete.js/0/autocomplete.min.jscdn.jsdelivr.net/autocomplete.js/0/... https://cdn.jsdelivr.net/autocomplete.js/0/autocomplete.min.js — 200 — 18.5 KiB — 12 ms — h2https://www.crossref.org//img/crossref-logo-reverse.svgwww.crossref.org//img/crossref-logo... https://www.crossref.org//img/crossref-logo-reverse.svg — 200 — 1.4 KiB — 474 ms — h2https://assets.crossref.org/logo/crossref-logo-200.svgassets.crossref.org/logo/crossref-l... https://assets.crossref.org/logo/crossref-logo-200.svg — 200 — 3.4 KiB — 110 ms — http/1.1https://crossref.org/images/footer/cc.svg/images/footer/cc.svg https://crossref.org/images/footer/cc.svg — 200 — 1.6 KiB — 111 ms — h2https://crossref.org/images/footer/by.svg/images/footer/by.svg https://crossref.org/images/footer/by.svg — 200 — 1.2 KiB — 101 ms — h2https://status.crossref.org/embed/script.jsstatus.crossref.org/embed/script.js https://status.crossref.org/embed/script.js — 200 — 1.5 KiB — 14 ms — h2https://kit.fontawesome.com/7e709bc1c7.jskit.fontawesome.com/7e709bc1c7.js https://kit.fontawesome.com/7e709bc1c7.js — 200 — 5.6 KiB — 39 ms — h2https://www.crossref.org//js/jquery.min.jswww.crossref.org//js/jquery.min.js https://www.crossref.org//js/jquery.min.js — 200 — 28.9 KiB — 104 ms — h2https://www.crossref.org//js/jquery.ui-min.jswww.crossref.org//js/jquery.ui-min.... https://www.crossref.org//js/jquery.ui-min.js — 200 — 8.3 KiB — 101 ms — h2https://use.fontawesome.com/1873acdb2d.cssuse.fontawesome.com/1873acdb2d.css https://use.fontawesome.com/1873acdb2d.css — 200 — 688 B — 25 ms — h2https://www.crossref.org//js/js.cookie.jswww.crossref.org//js/js.cookie.js https://www.crossref.org//js/js.cookie.js — 200 — 1.6 KiB — 109 ms — h2https://www.crossref.org//js/jquery.cookiebar.jswww.crossref.org//js/jquery.cookieb... https://www.crossref.org//js/jquery.cookiebar.js — 200 — 2.7 KiB — 112 ms — h2https://www.crossref.org//js/jquery.fancybox.jswww.crossref.org//js/jquery.fancybo... https://www.crossref.org//js/jquery.fancybox.js — 200 — 13.6 KiB — 106 ms — h2https://www.crossref.org//js/jquery.validate.jswww.crossref.org//js/jquery.validat... https://www.crossref.org//js/jquery.validate.js — 200 — 12.2 KiB — 110 ms — h2https://cdn.datatables.net/1.10.16/js/jquery.dataTables.min.jscdn.datatables.net/1.10.16/js/jquer... https://cdn.datatables.net/1.10.16/js/jquery.dataTables.min.js — 200 — 26.4 KiB — 35 ms — h2https://cdn.datatables.net/buttons/1.5.1/js/dataTables.buttons.min.jscdn.datatables.net/buttons/1.5.1/js... https://cdn.datatables.net/buttons/1.5.1/js/dataTables.buttons.min.js — 200 — 5.8 KiB — 31 ms — h2https://cdn.datatables.net/buttons/1.5.1/js/buttons.html5.min.jscdn.datatables.net/buttons/1.5.1/js... https://cdn.datatables.net/buttons/1.5.1/js/buttons.html5.min.js — 200 — 6.1 KiB — 37 ms — h2https://www.crossref.org//js/bootstrap.min.jswww.crossref.org//js/bootstrap.min.... https://www.crossref.org//js/bootstrap.min.js — 200 — 9.7 KiB — 292 ms — h2https://www.crossref.org//js/jquery.sticky-kit.min.jswww.crossref.org//js/jquery.sticky-... https://www.crossref.org//js/jquery.sticky-kit.min.js — 200 — 1.5 KiB — 114 ms — h2https://www.crossref.org//js/crossref.js?v=1www.crossref.org//js/crossref.js?v=... https://www.crossref.org//js/crossref.js?v=1 — 200 — 9.0 KiB — 292 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 1.2 s LCP 8.1 shttps://crossref.org// https://crossref.org/ — 200 — 8.7 KiB — 300 ms — h2https://pro.fontawesome.com/releases/v5.7.2/css/all.csspro.fontawesome.com/releases/v5.7.2... https://pro.fontawesome.com/releases/v5.7.2/css/all.css — 200 — 16.0 KiB — 81 ms — h2https://www.crossref.org//css/bootstrap.min.csswww.crossref.org//css/bootstrap.min... https://www.crossref.org//css/bootstrap.min.css — 200 — 18.3 KiB — 480 ms — h2https://use.fontawesome.com/1873acdb2d.jsuse.fontawesome.com/1873acdb2d.js https://use.fontawesome.com/1873acdb2d.js — 200 — 4.2 KiB — 79 ms — h2https://cdn.datatables.net/1.10.16/css/jquery.dataTables.min.csscdn.datatables.net/1.10.16/css/jque... https://cdn.datatables.net/1.10.16/css/jquery.dataTables.min.css — 200 — 2.4 KiB — 66 ms — h2https://cdn.datatables.net/buttons/1.5.1/css/buttons.dataTables.min.csscdn.datatables.net/buttons/1.5.1/cs... https://cdn.datatables.net/buttons/1.5.1/css/buttons.dataTables.min.css — 200 — 1.8 KiB — 68 ms — h2https://www.crossref.org//css/syntax.csswww.crossref.org//css/syntax.css https://www.crossref.org//css/syntax.css — 200 — 1.4 KiB — 290 ms — h2https://www.crossref.org/css/crossref.min.05ecfb7355911548d11343a672a95ea3d1320edf72da2de9b776f402bb6bedd3.csswww.crossref.org/css/crossref.min.0... https://www.crossref.org/css/crossref.min.05ecfb7355911548d11343a672a95ea3d1320edf72da2de9b776f402bb6bedd3.css — 200 — 20.7 KiB — 384 ms — h2https://www.crossref.org/css/print.min.5b37715a8e5bdae856e4d3b1fd9d7c8dad0c1d2cee2ed79d6397d375334339ce.csswww.crossref.org/css/print.min.5b37... https://www.crossref.org/css/print.min.5b37715a8e5bdae856e4d3b1fd9d7c8dad0c1d2cee2ed79d6397d375334339ce.css — 200 — 779 B — 476 ms — h2https://cdn.jsdelivr.net/algoliasearch/3/algoliasearch.min.jscdn.jsdelivr.net/algoliasearch/3/al... https://cdn.jsdelivr.net/algoliasearch/3/algoliasearch.min.js — 200 — 19.3 KiB — 13 ms — h2https://cdn.jsdelivr.net/autocomplete.js/0/autocomplete.min.jscdn.jsdelivr.net/autocomplete.js/0/... https://cdn.jsdelivr.net/autocomplete.js/0/autocomplete.min.js — 200 — 18.5 KiB — 12 ms — h2https://www.crossref.org//img/crossref-logo-reverse.svgwww.crossref.org//img/crossref-logo... https://www.crossref.org//img/crossref-logo-reverse.svg — 200 — 1.4 KiB — 474 ms — h2https://assets.crossref.org/logo/crossref-logo-200.svgassets.crossref.org/logo/crossref-l... https://assets.crossref.org/logo/crossref-logo-200.svg — 200 — 3.4 KiB — 110 ms — http/1.1https://crossref.org/images/footer/cc.svg/images/footer/cc.svg https://crossref.org/images/footer/cc.svg — 200 — 1.6 KiB — 111 ms — h2https://crossref.org/images/footer/by.svg/images/footer/by.svg https://crossref.org/images/footer/by.svg — 200 — 1.2 KiB — 101 ms — h2https://status.crossref.org/embed/script.jsstatus.crossref.org/embed/script.js https://status.crossref.org/embed/script.js — 200 — 1.5 KiB — 14 ms — h2https://kit.fontawesome.com/7e709bc1c7.jskit.fontawesome.com/7e709bc1c7.js https://kit.fontawesome.com/7e709bc1c7.js — 200 — 5.6 KiB — 39 ms — h2https://www.crossref.org//js/jquery.min.jswww.crossref.org//js/jquery.min.js https://www.crossref.org//js/jquery.min.js — 200 — 28.9 KiB — 104 ms — h2https://www.crossref.org//js/jquery.ui-min.jswww.crossref.org//js/jquery.ui-min.... https://www.crossref.org//js/jquery.ui-min.js — 200 — 8.3 KiB — 101 ms — h2https://use.fontawesome.com/1873acdb2d.cssuse.fontawesome.com/1873acdb2d.css https://use.fontawesome.com/1873acdb2d.css — 200 — 688 B — 25 ms — h2https://www.crossref.org//js/js.cookie.jswww.crossref.org//js/js.cookie.js https://www.crossref.org//js/js.cookie.js — 200 — 1.6 KiB — 109 ms — h2https://www.crossref.org//js/jquery.cookiebar.jswww.crossref.org//js/jquery.cookieb... https://www.crossref.org//js/jquery.cookiebar.js — 200 — 2.7 KiB — 112 ms — h2https://www.crossref.org//js/jquery.fancybox.jswww.crossref.org//js/jquery.fancybo... https://www.crossref.org//js/jquery.fancybox.js — 200 — 13.6 KiB — 106 ms — h2https://www.crossref.org//js/jquery.validate.jswww.crossref.org//js/jquery.validat... https://www.crossref.org//js/jquery.validate.js — 200 — 12.2 KiB — 110 ms — h2https://cdn.datatables.net/1.10.16/js/jquery.dataTables.min.jscdn.datatables.net/1.10.16/js/jquer... https://cdn.datatables.net/1.10.16/js/jquery.dataTables.min.js — 200 — 26.4 KiB — 35 ms — h2https://cdn.datatables.net/buttons/1.5.1/js/dataTables.buttons.min.jscdn.datatables.net/buttons/1.5.1/js... https://cdn.datatables.net/buttons/1.5.1/js/dataTables.buttons.min.js — 200 — 5.8 KiB — 31 ms — h2https://cdn.datatables.net/buttons/1.5.1/js/buttons.html5.min.jscdn.datatables.net/buttons/1.5.1/js... https://cdn.datatables.net/buttons/1.5.1/js/buttons.html5.min.js — 200 — 6.1 KiB — 37 ms — h2https://www.crossref.org//js/bootstrap.min.jswww.crossref.org//js/bootstrap.min.... https://www.crossref.org//js/bootstrap.min.js — 200 — 9.7 KiB — 292 ms — 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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
36% of JavaScript execution is third-party
First-party Third-party 171ms · 29KB · $1/mo
Unattributable
Other
Optional
Execution 117ms
Transfer 0 KB
Monthly Cost $0/mo
www.crossref.org
Other
Optional
Execution 54ms
Transfer 29 KB
Monthly Cost $0/mo

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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