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https://webofscience.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
4
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
58
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
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.
42
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.

7.74 s

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

7.96 s

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

6 ms

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

0.011

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

7.74 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.

8.50 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
7 PASS 4 REVIEW 4 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 (1.8 MiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2546ms total JS execution
FIX
2546ms total JS execution
Warning::
https://access.clarivate.com/public/main.b64b58536...: 1483ms CPU time
Warning::
https://access.clarivate.com/public/polyfills.6471...: 551ms CPU time
Warning::
Unattributable: 348ms CPU time
Info::
https://access.clarivate.com/login?app=wos&alterna...: 86ms CPU time
Info::
https://access.clarivate.com/public/659.48d0fea43d...: 78ms CPU time
Warning::
Third-party scripts: 2546ms (100% of total)

Main Thread Breakdown

Script Evaluation 63% Other 19% Style & Layout 10% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://access.clarivate.com/public/main.b64b5853616899a2.js1483ms1212ms110ms3rd
https://access.clarivate.com/public/polyfills.64718c1a6b92b54d.js551ms412ms2ms3rd
Unattributable348ms5ms0ms3rd
https://access.clarivate.com/login?app=wos&alternative=true&goto=https%3A%2F%2Fwww.webofknowledge.com&shibShireURL=https%3A%2F%2Fwww.webofknowledge.com%2F%3Fauth%3DShibboleth&shibReturnURL=https%3A%2F%2Fwww.webofknowledge.com%2F&roaming=true86ms5ms1ms3rd
https://access.clarivate.com/public/659.48d0fea43d7d5460.js78ms2ms4ms3rd
D
Page Weight Inventory
Action
46 resources · 1.8 MB · 102 KB savings available
FIX
46 resources · 1.8 MB · 102 KB savings available
Warning::
Page weight 836 KB over 1MB target
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~102 KB of savings available
Warning::
45 third-party resources (100% of weight)
Info::
4 resources over 200KB
46 resources · 1.8 MiB · 45 third-party 836.0 KiB over 1MB target
CSS 38% · 699.8 KiB
JavaScript 36% · 667.9 KiB
Image 17% · 324.9 KiB
Font 8% · 154.7 KiB
Other 0% · 8.6 KiB
Document 0% · 4.1 KiB

~101.6 KiB of savings available

Remove unused JavaScript: 101.6 KiB
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
Page Weight Budget
Action
1.8 MB transferred, 46 requests
REVIEW
1.8 MB transferred, 46 requests
Info::
Page weighs 5.8 MB (1.8 MB transferred)
Info::
CSS is 700 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 700 KB
Warning::
JavaScript is 668 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 668 KB
Info::
46 HTTP requests
Info::
Estimated 0.38 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
46 requests
0.38 g CO2 per page load
CSS 699.8 KiB 38%
JavaScript 667.9 KiB 36%
Images 317.4 KiB 17%
Fonts 154.7 KiB 8%
Other 14.9 KiB 1%
HTML 4.0 KiB 0%
Other 1.3 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

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

B
Image Optimization
9 images, 0 KB saveable
REVIEW
9 images, 0 KB saveable
Warning::
https://access.clarivate.com/public/assets/img/wos... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
9 images 317 KB
0 oversized -0 KB
8 legacy format
1 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

B
JS Bundles
14 scripts, 102 KB unused
REVIEW
14 scripts, 102 KB unused
Warning::
https://access.clarivate.com/public/main.b64b58536...: 102 KB unused (30%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 102 KB
102 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://access.clarivate.com/public/main.b64b5853616899a2.js340 KB102 KB (30%)✓3rd
https://access.clarivate.com/public/560.307eea494db12d50.js6 KB—✓3rd
https://access.clarivate.com/public/polyfills.64718c1a6b92b54d.js12 KB—✓3rd
https://access.clarivate.com/public/i18n-json-1.7400cf1f0834d0ed.js15 KB—✓3rd
https://access.clarivate.com/public/659.48d0fea43d7d5460.js213 KB—✓3rd
https://access.clarivate.com/public/817.c79c77ae1565a5a3.js4 KB—✓3rd
https://access.clarivate.com/public/runtime.fb1d508f789f09f3.js3 KB—✓3rd
https://access.clarivate.com/public/384.2ccbdc21e480dc44.js8 KB—✓3rd
https://access.clarivate.com/public/147.3cd549455f84dd63.js17 KB—✓3rd
https://access.clarivate.com/public/0.87f5e28162e08025.js4 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

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+
Font Loading
3 fonts (155 KB)
PASS
3 fonts (155 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

155 KB total

Render-blocking

0

of 3

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 7.7 s LCP 8.0 shttps://access.clarivate.com/public/material-icons.59322316b3fd6063.woff2material-icons.59322316... https://access.clarivate.com/public/material-icons.59322316b3fd6063.woff2 — 125.6 KiB — 12 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAADnoAA0AAAAAiAgAADmSAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGm4bzzYckBwG…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAADnoAA0AAAAAiAgAADmSAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGm4bzzYckBwG… — 14.5 KiB — 14 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAADosAA0AAAAAiHwAADnTAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGm4bz0IckBwG…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAADosAA0AAAAAiHwAADnTAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGm4bz0IckBwG… — 14.5 KiB — 15 ms — font-display: swap
material-icons.59322316... woff2 swap
Size 126 KB
Load time 12 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
woff2;base64,d09GMgABAA... woff2 swap
Size 14 KB
Load time 14 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
woff2;base64,d09GMgABAA... woff2 swap
Size 15 KB
Load time 15 ms
Start 1.5 s
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 ~63 KB and ~126 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+
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
46 requests over 2409ms
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 7.7 s LCP 8.0 shttps://webofscience.com// https://webofscience.com/ — 302 — 90 B — 526 ms — h2https://www.webofknowledge.com/www.webofknowledge.com/ https://www.webofknowledge.com/ — 302 — 598 B — 101 ms — h2https://access.clarivate.com/login?app=wos&alternative=true&goto=https%3A%2F%2Fwww.webofknowledge.com&shibShireURL=https%3A%2F%2Fwww.webofknowledge.com%2F%3Fauth%3DShibboleth&shibReturnURL=https%3A%2F%2Fwww.webofknowledge.com%2F&roaming=trueaccess.clarivate.com/login?app=wos&... https://access.clarivate.com/login?app=wos&alternative=true&goto=https%3A%2F%2Fwww.webofknowledge.com&shibShireURL=https%3A%2F%2Fwww.webofknowledge.com%2F%3Fauth%3DShibboleth&shibReturnURL=https%3A%2F%2Fwww.webofknowledge.com%2F&roaming=true — 200 — 2.3 KiB — 186 ms — h2https://access.clarivate.com/public/runtime.fb1d508f789f09f3.jsaccess.clarivate.com/public/runtime... https://access.clarivate.com/public/runtime.fb1d508f789f09f3.js — 200 — 2.5 KiB — 13 ms — h2https://access.clarivate.com/public/polyfills.64718c1a6b92b54d.jsaccess.clarivate.com/public/polyfil... https://access.clarivate.com/public/polyfills.64718c1a6b92b54d.js — 200 — 12.5 KiB — 11 ms — h2https://access.clarivate.com/public/main.b64b5853616899a2.jsaccess.clarivate.com/public/main.b6... https://access.clarivate.com/public/main.b64b5853616899a2.js — 200 — 340.2 KiB — 25 ms — h2https://access.clarivate.com/public/styles.cb7a241cfd0426b1.cssaccess.clarivate.com/public/styles.... https://access.clarivate.com/public/styles.cb7a241cfd0426b1.css — 200 — 57.9 KiB — 18 ms — h2https://access.clarivate.com/public/i18n-json-1.7400cf1f0834d0ed.jsaccess.clarivate.com/public/i18n-js... https://access.clarivate.com/public/i18n-json-1.7400cf1f0834d0ed.js — 200 — 15.4 KiB — 10 ms — h2https://access.clarivate.com/public/659.48d0fea43d7d5460.jsaccess.clarivate.com/public/659.48d... https://access.clarivate.com/public/659.48d0fea43d7d5460.js — 200 — 213.5 KiB — 45 ms — h2https://access.clarivate.com/public/817.c79c77ae1565a5a3.jsaccess.clarivate.com/public/817.c79... https://access.clarivate.com/public/817.c79c77ae1565a5a3.js — 200 — 3.7 KiB — 9 ms — h2https://access.clarivate.com/public/560.307eea494db12d50.jsaccess.clarivate.com/public/560.307... https://access.clarivate.com/public/560.307eea494db12d50.js — 200 — 6.0 KiB — 13 ms — h2https://access.clarivate.com/public/384.2ccbdc21e480dc44.jsaccess.clarivate.com/public/384.2cc... https://access.clarivate.com/public/384.2ccbdc21e480dc44.js — 200 — 8.4 KiB — 18 ms — h2https://access.clarivate.com/public/147.3cd549455f84dd63.jsaccess.clarivate.com/public/147.3cd... https://access.clarivate.com/public/147.3cd549455f84dd63.js — 200 — 16.6 KiB — 18 ms — h2https://access.clarivate.com/public/0.87f5e28162e08025.jsaccess.clarivate.com/public/0.87f5e... https://access.clarivate.com/public/0.87f5e28162e08025.js — 200 — 3.8 KiB — 18 ms — h2https://access.clarivate.com/public/976.e3dfdd40cac4bb95.jsaccess.clarivate.com/public/976.e3d... https://access.clarivate.com/public/976.e3dfdd40cac4bb95.js — 200 — 10.5 KiB — 22 ms — h2https://access.clarivate.com/public/common.7cbce2e26ceb35eb.jsaccess.clarivate.com/public/common.... https://access.clarivate.com/public/common.7cbce2e26ceb35eb.js — 200 — 1.8 KiB — 20 ms — h2https://access.clarivate.com/public/664.6df6dfd4664df79e.jsaccess.clarivate.com/public/664.6df... https://access.clarivate.com/public/664.6df6dfd4664df79e.js — 200 — 22.4 KiB — 24 ms — h2https://access.clarivate.com/public/src/assets/img/clarivate.svgaccess.clarivate.com/public/src/ass... https://access.clarivate.com/public/src/assets/img/clarivate.svg — 200 — 3.3 KiB — 10 ms — h2data:image/svg+xml,<svg height='10px' width='10px' viewBox='0 0 16 16' fill='white' xmlns='http://w…w… data:image/svg+xml,<svg height='10px' width='10px' viewBox='0 0 16 16' fill='white' xmlns='http://w… — 200 — 0 B — 0 ms — datahttps://access.clarivate.com/app/api/util/countryaccess.clarivate.com/app/api/util/c... https://access.clarivate.com/app/api/util/country — 200 — 1.5 KiB — 168 ms — h2https://access.clarivate.com/app/api/util/countryaccess.clarivate.com/app/api/util/c... https://access.clarivate.com/app/api/util/country — 200 — 135 B — 478 ms — h2https://www.webofscience.com/wos/static/html/login-splash/roaming.htmlwww.webofscience.com/wos/static/htm... https://www.webofscience.com/wos/static/html/login-splash/roaming.html — 200 — 1.7 KiB — 94 ms — h2https://access.clarivate.com/app/api/util/countryaccess.clarivate.com/app/api/util/c... https://access.clarivate.com/app/api/util/country — 200 — 122 B — 473 ms — h2https://access.clarivate.com/public/src/assets/social-icons-svg/facebook-logo.svgaccess.clarivate.com/public/src/ass... https://access.clarivate.com/public/src/assets/social-icons-svg/facebook-logo.svg — 200 — 640 B — 10 ms — h2https://access.clarivate.com/public/src/assets/social-icons-svg/google-logo.svgaccess.clarivate.com/public/src/ass... https://access.clarivate.com/public/src/assets/social-icons-svg/google-logo.svg — 200 — 313 B — 9 ms — h2https://access.clarivate.com/public/src/assets/social-icons-svg/orcid-logo.svgaccess.clarivate.com/public/src/ass... https://access.clarivate.com/public/src/assets/social-icons-svg/orcid-logo.svg — 200 — 1.8 KiB — 8 ms — h2https://access.clarivate.com/public/src/assets/social-icons-svg/linkedin-logo.svgaccess.clarivate.com/public/src/ass... https://access.clarivate.com/public/src/assets/social-icons-svg/linkedin-logo.svg — 200 — 834 B — 8 ms — h2https://snowplow-collector.userintel.prod.sp.aws.clarivate.net/com.snowplowanalytics.snowplow/tp2snowplow-collector.userintel.prod.s... https://snowplow-collector.userintel.prod.sp.aws.clarivate.net/com.snowplowanalytics.snowplow/tp2 — 200 — 0 B — 555 ms — h2https://www.webofscience.com/wos/static/html/login-splash/style_v2.csswww.webofscience.com/wos/static/htm... https://www.webofscience.com/wos/static/html/login-splash/style_v2.css — 200 — 1.1 KiB — 29 ms — h2https://www.webofscience.com/wos/static/font/source-sans-pro.csswww.webofscience.com/wos/static/fon... https://www.webofscience.com/wos/static/font/source-sans-pro.css — 200 — 640.7 KiB — 96 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 7.7 s LCP 8.0 shttps://webofscience.com// https://webofscience.com/ — 302 — 90 B — 526 ms — h2https://www.webofknowledge.com/www.webofknowledge.com/ https://www.webofknowledge.com/ — 302 — 598 B — 101 ms — h2https://access.clarivate.com/login?app=wos&alternative=true&goto=https%3A%2F%2Fwww.webofknowledge.com&shibShireURL=https%3A%2F%2Fwww.webofknowledge.com%2F%3Fauth%3DShibboleth&shibReturnURL=https%3A%2F%2Fwww.webofknowledge.com%2F&roaming=trueaccess.clarivate.com/login?app=wos&... https://access.clarivate.com/login?app=wos&alternative=true&goto=https%3A%2F%2Fwww.webofknowledge.com&shibShireURL=https%3A%2F%2Fwww.webofknowledge.com%2F%3Fauth%3DShibboleth&shibReturnURL=https%3A%2F%2Fwww.webofknowledge.com%2F&roaming=true — 200 — 2.3 KiB — 186 ms — h2https://access.clarivate.com/public/runtime.fb1d508f789f09f3.jsaccess.clarivate.com/public/runtime... https://access.clarivate.com/public/runtime.fb1d508f789f09f3.js — 200 — 2.5 KiB — 13 ms — h2https://access.clarivate.com/public/polyfills.64718c1a6b92b54d.jsaccess.clarivate.com/public/polyfil... https://access.clarivate.com/public/polyfills.64718c1a6b92b54d.js — 200 — 12.5 KiB — 11 ms — h2https://access.clarivate.com/public/main.b64b5853616899a2.jsaccess.clarivate.com/public/main.b6... https://access.clarivate.com/public/main.b64b5853616899a2.js — 200 — 340.2 KiB — 25 ms — h2https://access.clarivate.com/public/styles.cb7a241cfd0426b1.cssaccess.clarivate.com/public/styles.... https://access.clarivate.com/public/styles.cb7a241cfd0426b1.css — 200 — 57.9 KiB — 18 ms — h2https://access.clarivate.com/public/i18n-json-1.7400cf1f0834d0ed.jsaccess.clarivate.com/public/i18n-js... https://access.clarivate.com/public/i18n-json-1.7400cf1f0834d0ed.js — 200 — 15.4 KiB — 10 ms — h2https://access.clarivate.com/public/659.48d0fea43d7d5460.jsaccess.clarivate.com/public/659.48d... https://access.clarivate.com/public/659.48d0fea43d7d5460.js — 200 — 213.5 KiB — 45 ms — h2https://access.clarivate.com/public/817.c79c77ae1565a5a3.jsaccess.clarivate.com/public/817.c79... https://access.clarivate.com/public/817.c79c77ae1565a5a3.js — 200 — 3.7 KiB — 9 ms — h2https://access.clarivate.com/public/560.307eea494db12d50.jsaccess.clarivate.com/public/560.307... https://access.clarivate.com/public/560.307eea494db12d50.js — 200 — 6.0 KiB — 13 ms — h2https://access.clarivate.com/public/384.2ccbdc21e480dc44.jsaccess.clarivate.com/public/384.2cc... https://access.clarivate.com/public/384.2ccbdc21e480dc44.js — 200 — 8.4 KiB — 18 ms — h2https://access.clarivate.com/public/147.3cd549455f84dd63.jsaccess.clarivate.com/public/147.3cd... https://access.clarivate.com/public/147.3cd549455f84dd63.js — 200 — 16.6 KiB — 18 ms — h2https://access.clarivate.com/public/0.87f5e28162e08025.jsaccess.clarivate.com/public/0.87f5e... https://access.clarivate.com/public/0.87f5e28162e08025.js — 200 — 3.8 KiB — 18 ms — h2https://access.clarivate.com/public/976.e3dfdd40cac4bb95.jsaccess.clarivate.com/public/976.e3d... https://access.clarivate.com/public/976.e3dfdd40cac4bb95.js — 200 — 10.5 KiB — 22 ms — h2https://access.clarivate.com/public/common.7cbce2e26ceb35eb.jsaccess.clarivate.com/public/common.... https://access.clarivate.com/public/common.7cbce2e26ceb35eb.js — 200 — 1.8 KiB — 20 ms — h2https://access.clarivate.com/public/664.6df6dfd4664df79e.jsaccess.clarivate.com/public/664.6df... https://access.clarivate.com/public/664.6df6dfd4664df79e.js — 200 — 22.4 KiB — 24 ms — h2https://access.clarivate.com/public/src/assets/img/clarivate.svgaccess.clarivate.com/public/src/ass... https://access.clarivate.com/public/src/assets/img/clarivate.svg — 200 — 3.3 KiB — 10 ms — h2data:image/svg+xml,<svg height='10px' width='10px' viewBox='0 0 16 16' fill='white' xmlns='http://w…w… data:image/svg+xml,<svg height='10px' width='10px' viewBox='0 0 16 16' fill='white' xmlns='http://w… — 200 — 0 B — 0 ms — datahttps://access.clarivate.com/app/api/util/countryaccess.clarivate.com/app/api/util/c... https://access.clarivate.com/app/api/util/country — 200 — 1.5 KiB — 168 ms — h2https://access.clarivate.com/app/api/util/countryaccess.clarivate.com/app/api/util/c... https://access.clarivate.com/app/api/util/country — 200 — 135 B — 478 ms — h2https://www.webofscience.com/wos/static/html/login-splash/roaming.htmlwww.webofscience.com/wos/static/htm... https://www.webofscience.com/wos/static/html/login-splash/roaming.html — 200 — 1.7 KiB — 94 ms — h2https://access.clarivate.com/app/api/util/countryaccess.clarivate.com/app/api/util/c... https://access.clarivate.com/app/api/util/country — 200 — 122 B — 473 ms — h2https://access.clarivate.com/public/src/assets/social-icons-svg/facebook-logo.svgaccess.clarivate.com/public/src/ass... https://access.clarivate.com/public/src/assets/social-icons-svg/facebook-logo.svg — 200 — 640 B — 10 ms — 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h2https://www.webofscience.com/wos/static/html/login-splash/style_v2.csswww.webofscience.com/wos/static/htm... https://www.webofscience.com/wos/static/html/login-splash/style_v2.css — 200 — 1.1 KiB — 29 ms — h2https://www.webofscience.com/wos/static/font/source-sans-pro.csswww.webofscience.com/wos/static/fon... https://www.webofscience.com/wos/static/font/source-sans-pro.css — 200 — 640.7 KiB — 96 ms — h2https://access.clarivate.com/public/assets/img/wos-1.svgaccess.clarivate.com/public/assets/... https://access.clarivate.com/public/assets/img/wos-1.svg — 200 — 3.2 KiB — 15 ms — h2https://www.webofscience.com/wos/static/images/login-splash/get-noticed1.svgwww.webofscience.com/wos/static/ima... https://www.webofscience.com/wos/static/images/login-splash/get-noticed1.svg — 200 — 2.7 KiB — 33 ms — h2https://www.webofscience.com/wos/static/images/login-splash/get-credit1.svgwww.webofscience.com/wos/static/ima... https://www.webofscience.com/wos/static/images/login-splash/get-credit1.svg — 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h2https://snowplow-collector.userintel.prod.sp.aws.clarivate.net/com.snowplowanalytics.snowplow/tp2snowplow-collector.userintel.prod.s... https://snowplow-collector.userintel.prod.sp.aws.clarivate.net/com.snowplowanalytics.snowplow/tp2 — 200 — 244 B — 527 ms — h2
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 2546ms · 568KB · €28/mo
access.clarivate.com
Other
Costly
Execution 1483ms
Transfer 340 KB
Unused 30%
Monthly Cost €16/mo
access.clarivate.com
Other
Costly
Execution 551ms
Transfer 12 KB
Monthly Cost €6/mo
Unattributable
Other
Costly
Execution 348ms
Transfer 0 KB
Monthly Cost €4/mo
access.clarivate.com
Other
Optional
Execution 86ms
Transfer 2 KB
Monthly Cost €1/mo
access.clarivate.com
Other
Optional
Execution 78ms
Transfer 213 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • access.clarivate.com adds 1483ms and costs ~€16/month
  • access.clarivate.com adds 551ms and costs ~€6/month
  • Unattributable adds 348ms 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

access.clarivate.com takes 1483ms 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

access.clarivate.com takes 551ms 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 348ms 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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