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https://oxfordjournals.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
1
REVIEW
3
PASS
11
INFO
2

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

Mobile Desktop
66
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
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.
45
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.

3.79 s

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

1.01 s

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

0.006

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

1.65 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.

4.19 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
11 PASS 3 REVIEW 1 FIX
D
Third-Party Impact
Action
99% third-party, 0 ms blocking
FIX
99% third-party, 0 ms blocking
Warning::
Third-party code accounts for 99% of page weight (458.9 KiB of 461.2 KiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
C
JS Execution Cost
Action
1800ms total JS execution
REVIEW
1800ms total JS execution
Warning::
https://academic.oup.com/cdn-cgi/challenge-platfor...: 1411ms CPU time
Warning::
Unattributable: 259ms CPU time
Info::
https://academic.oup.com/[Journals:]: 130ms CPU time
Warning::
Third-party scripts: 1800ms (100% of total)

Main Thread Breakdown

Script Evaluation 76% Other 16% Style & Layout 3%
ScriptTotalScriptingParse/CompileParty
https://academic.oup.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9eff0c547f33565d1411ms1350ms23ms3rd
Unattributable259ms6ms0ms3rd
https://academic.oup.com/[Journals:]130ms15ms2ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
no-cache
REVIEW
no-cache
Info::
Cache-Control header is set
Got: no-cache
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache

DirectiveValueMeaning
no-cache—Cache but always revalidate first
A+
Page Weight Budget
461 KB transferred, 20 requests
PASS
461 KB transferred, 20 requests
Info::
Page weighs 865 KB (461 KB transferred)
Info::
20 HTTP requests
Info::
Estimated 0.09 g CO2 per page load
461 KB / 2.4 MB budget
461 KB transferred
20 requests
0.09 g CO2 per page load
Other 262.8 KiB 57%
HTML 95.5 KiB 21%
JavaScript 88.2 KiB 19%
Images 6.6 KiB 1%
Other 6.5 KiB 1%
Other 1.7 KiB 0%
0 2.4 MB 4.9 MB
Under budget
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
Image Optimization
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 7 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
7 scripts, 0 KB unused
PASS
7 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://academic.oup.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9eff0c547f33565d71 KB—✓3rd
blob:https://academic.oup.com/15704f4a-1c10-4ed4-8dc4-5f74bb29c95b0 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit17 KB—✓3rd
blob:https://academic.oup.com/0248c4d6-da36-45b7-845f-e26f49f5026e-0 KB—✓3rd
blob:https://challenges.cloudflare.com/b927abef-e07d-44eb-9c6a-efc8218159b20 KB—✓3rd
blob:https://challenges.cloudflare.com/5ffc98f9-9fa9-4541-b5d3-63ae53f948d5-0 KB—✓3rd
blob:https://challenges.cloudflare.com/5ffc98f9-9fa9-4541-b5d3-63ae53f948d5-0 KB—✓3rd
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
Page Weight Inventory
20 resources · 461 KB · 0 KB savings available
PASS
20 resources · 461 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 461 KB
Warning::
17 third-party resources (99% of weight)
Info::
1 resources over 200KB
20 resources · 461.2 KiB · 17 third-party Within 1MB page-weight target
Other 57% · 264.5 KiB
Document 22% · 101.9 KiB
JavaScript 19% · 88.2 KiB
Image 1% · 6.6 KiB
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
20 requests over 2483ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.5 s LCP 3.8 shttps://oxfordjournals.org// https://oxfordjournals.org/ — 200 — 1.5 KiB — 347 ms — h2https://oxfordjournals.org// https://oxfordjournals.org/ — 301 — 433 B — 118 ms — h2https://academic.oup.com/[Journals:]academic.oup.com/[Journals:] https://academic.oup.com/[Journals:] — 307 — 68 B — 24 ms — http/1.1https://oxfordjournals.org// https://oxfordjournals.org/ — 301 — 433 B — 117 ms — h2https://academic.oup.com/[Journals:]academic.oup.com/[Journals:] https://academic.oup.com/[Journals:] — 403 — 4.0 KiB — 7 ms — h2https://academic.oup.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9eff0c547f33565dacademic.oup.com/cdn-cgi/challenge-... https://academic.oup.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9eff0c547f33565d — 200 — 70.7 KiB — 22 ms — h2blob:https://academic.oup.com/15704f4a-1c10-4ed4-8dc4-5f74bb29c95bacademic.oup.com/15704f4a-1c10-4ed4... blob:https://academic.oup.com/15704f4a-1c10-4ed4-8dc4-5f74bb29c95b — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicitchallenges.cloudflare.com/turnstile... https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit — 200 — 17.4 KiB — 21 ms — h3https://academic.oup.com/favicon.icoacademic.oup.com/favicon.ico https://academic.oup.com/favicon.ico — 403 — 6.0 KiB — 10 ms — h2https://academic.oup.com/favicon.icoacademic.oup.com/favicon.ico https://academic.oup.com/favicon.ico — 403 — 5.5 KiB — 8 ms — h2https://academic.oup.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2861708471:1776798608:ErqmkTBsxeuPEUEQ-nj3Qg5gifcpzcridMS7hc7f-HQ/9eff0c547f33565d/Tunx4FH9hMfKstcuh6MWOx6erOVCfPmWHua8uSj23Y8-1776802394-1.2.1.1-daEPtuSTSa1stEkLRoOGSwwR2VYhA3Ysq1lS3Eux41UV..qVGr2NN0HVuIE9ywecacademic.oup.com/cdn-cgi/challenge-... https://academic.oup.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2861708471:1776798608:ErqmkTBsxeuPEUEQ-nj3Qg5gifcpzcridMS7hc7f-HQ/9eff0c547f33565d/Tunx4FH9hMfKstcuh6MWOx6erOVCfPmWHua8uSj23Y8-1776802394-1.2.1.1-daEPtuSTSa1stEkLRoOGSwwR2VYhA3Ysq1lS3Eux41UV..qVGr2NN0HVuIE9ywec — 200 — 13.9 KiB — 22 ms — h2blob:https://academic.oup.com/0248c4d6-da36-45b7-845f-e26f49f5026eacademic.oup.com/0248c4d6-da36-45b7... blob:https://academic.oup.com/0248c4d6-da36-45b7-845f-e26f49f5026e — 200 — -1 B — 31 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/f96vy/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=autochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/f96vy/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=auto — 200 — 90.0 KiB — 25 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1 — 200 — 208 B — 8 ms — h3blob:https://challenges.cloudflare.com/b927abef-e07d-44eb-9c6a-efc8218159b2challenges.cloudflare.com/b927abef-... blob:https://challenges.cloudflare.com/b927abef-e07d-44eb-9c6a-efc8218159b2 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/1903685616:1776798609:2mBkH0c1QanQ_dZT3befYwdTaacqrcigMbTTBv3MVeo/9eff0c56ab25d884/BBWhY8LA5C7O9I8q5VEbYPMejq0CEgIc09fZqEfFJzc-1776802394-1.2.1.1-AQd86Idm2b8yUpIrZfJPW4gS89xs1mz2fCIdqE51UFv_SS.BeutDEwGzEcojJKVgchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/1903685616:1776798609:2mBkH0c1QanQ_dZT3befYwdTaacqrcigMbTTBv3MVeo/9eff0c56ab25d884/BBWhY8LA5C7O9I8q5VEbYPMejq0CEgIc09fZqEfFJzc-1776802394-1.2.1.1-AQd86Idm2b8yUpIrZfJPW4gS89xs1mz2fCIdqE51UFv_SS.BeutDEwGzEcojJKVg — 200 — 249.0 KiB — 116 ms — h3blob:https://challenges.cloudflare.com/5ffc98f9-9fa9-4541-b5d3-63ae53f948d5challenges.cloudflare.com/5ffc98f9-... blob:https://challenges.cloudflare.com/5ffc98f9-9fa9-4541-b5d3-63ae53f948d5 — 200 — -1 B — 20 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9eff0c56ab25d884/1776802395013/nXHi66VwBBcxNztchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9eff0c56ab25d884/1776802395013/nXHi66VwBBcxNzt — 200 — 446 B — 8 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9eff0c56ab25d884/1776802395013/1958546f18edb93bd87a91074c9a921bd34d76bea91c32fe3c900c396548626f/7E-rICpWJy6E1JTchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9eff0c56ab25d884/1776802395013/1958546f18edb93bd87a91074c9a921bd34d76bea91c32fe3c900c396548626f/7E-rICpWJy6E1JT — 401 — 1.7 KiB — 7 ms — h3blob:https://challenges.cloudflare.com/5ffc98f9-9fa9-4541-b5d3-63ae53f948d5challenges.cloudflare.com/5ffc98f9-... blob:https://challenges.cloudflare.com/5ffc98f9-9fa9-4541-b5d3-63ae53f948d5 — 200 — -1 B — 27 ms — blob
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 1800ms · 75KB · $24/mo
academic.oup.com
Other
Costly
Execution 1411ms
Transfer 71 KB
Monthly Cost $19/mo
Unattributable
Other
Costly
Execution 259ms
Transfer 0 KB
Monthly Cost $3/mo
academic.oup.com
Other
Optional
Execution 130ms
Transfer 4 KB
Monthly Cost $2/mo

These scripts may cost more than they're worth

  • academic.oup.com adds 1411ms and costs ~$19/month
  • Unattributable adds 259ms and costs ~$3/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

academic.oup.com takes 1411ms 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 259ms 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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