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https://skyscanner.net

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
85
GRADE
B
FIX
3
REVIEW
6
PASS
14
INFO
3

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

Mobile Desktop
55
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
84
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
91
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.

1.56 s

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

4.26 s

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

2.28 s

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

0.068

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

3.31 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.

8.36 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
26
14 PASS 6 REVIEW 3 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 (684.4 KiB of 684.7 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5698ms total JS execution
FIX
5698ms total JS execution
Warning::
https://client.px-cloud.net/PXrf8vapwA/main.min.js: 3190ms CPU time
Warning::
https://www.skyscanner.net/rf8vapwA/captcha.js?a=c...: 1844ms CPU time
Warning::
Unattributable: 412ms CPU time
Info::
https://www.skyscanner.net/sttc/px/captcha-v2/stat...: 150ms CPU time
Info::
https://www.skyscanner.net/sttc/px/captcha-v2/inde...: 103ms CPU time
Warning::
Third-party scripts: 5698ms (100% of total)

Main Thread Breakdown

Script Evaluation 66% Style & Layout 20% Other 9%
ScriptTotalScriptingParse/CompileParty
https://client.px-cloud.net/PXrf8vapwA/main.min.js3190ms1994ms17ms3rd
https://www.skyscanner.net/rf8vapwA/captcha.js?a=captcha&m=0&u=518bc4d5-4c6c-11f1-bed8-de561741a3fe&v=1844ms1647ms48ms3rd
Unattributable412ms15ms0ms3rd
https://www.skyscanner.net/sttc/px/captcha-v2/static/js/main.80db1e99.js150ms124ms21ms3rd
https://www.skyscanner.net/sttc/px/captcha-v2/index.html?url=Lz8=&uuid=518bc4d5-4c6c-11f1-bed8-de561741a3fe&vid=103ms4ms1ms3rd
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
JS Bundles
Action
9 scripts, 181 KB unused
REVIEW
9 scripts, 181 KB unused
Warning::
https://www.skyscanner.net/rf8vapwA/captcha.js?a=c...: 44 KB unused (17%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.skyscanner.net/rf8vapwA/captcha.js?a=c...: 44 KB unused (17%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.skyscanner.net/sttc/px/captcha-v2/stat...: 35 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://client.px-cloud.net/PXrf8vapwA/main.min.js: 29 KB unused (30%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://client.px-cloud.net/PXrf8vapwA/main.min.js: 29 KB unused (30%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 181 KB
181 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.skyscanner.net/rf8vapwA/captcha.js?a=captcha&m=0&u=518bc4d5-4c6c-11f1-bed8-de561741a3fe&v=264 KB44 KB (17%)✓3rd
https://www.skyscanner.net/rf8vapwA/captcha.js?a=captcha&m=0&u=518bc4d5-4c6c-11f1-bed8-de561741a3fe&v=0 KB44 KB (17%)✓3rd
https://www.skyscanner.net/sttc/px/captcha-v2/static/js/main.80db1e99.js84 KB35 KB (42%)✓3rd
https://client.px-cloud.net/PXrf8vapwA/main.min.js95 KB29 KB (30%)✓3rd
https://client.px-cloud.net/PXrf8vapwA/main.min.js0 KB29 KB (30%)✓3rd
blob:https://www.skyscanner.net/3611bdc6-6afa-40d5-9d37-698a91fbd5300 KB—✓3rd
blob:https://www.skyscanner.net/6f0edb19-ea16-4c46-a8f4-cd4d065ad211-0 KB—✓3rd
blob:https://www.skyscanner.net/40cbe9a7-691f-49fe-a8db-c546442463bd-0 KB—✓3rd
https://crcldu.com/bd/auditor.js?v=1778416320000152 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

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

B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
685 KB transferred, 25 requests
PASS
685 KB transferred, 25 requests
Info::
Page weighs 1.6 MB (685 KB transferred)
Warning::
JavaScript is 595 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 595 KB
Info::
25 HTTP requests
Info::
Estimated 0.14 g CO2 per page load
685 KB / 2.4 MB budget
685 KB transferred
25 requests
0.14 g CO2 per page load
JavaScript 594.7 KiB 87%
Other 35.0 KiB 5%
Other 22.6 KiB 3%
Images 14.3 KiB 2%
CSS 7.1 KiB 1%
Other 6.8 KiB 1%
HTML 3.4 KiB 1%
Other 806 B 0%
0 2.4 MB 4.9 MB
Under 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

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
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Info::
All images are well-optimized
1 images 14 KB
0 oversized -0 KB
1 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+
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+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A
Page Weight Inventory
25 resources · 685 KB · 181 KB savings available
PASS
25 resources · 685 KB · 181 KB savings available
Info::
Within 1MB page-weight target
Got: 685 KB
Info::
~181 KB of savings available
Warning::
24 third-party resources (100% of weight)
Info::
1 resources over 200KB
25 resources · 684.7 KiB · 24 third-party Within 1MB page-weight target
JavaScript 87% · 594.7 KiB
Image 7% · 48.0 KiB
Other 4% · 28.9 KiB
CSS 1% · 7.1 KiB
Document 1% · 6.0 KiB

~180.7 KiB of savings available

Remove unused JavaScript: 180.7 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
A
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
Total JS execution time is 5.7 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Network Waterfall
25 requests over 2896ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.6 s LCP 4.3 shttps://skyscanner.net// https://skyscanner.net/ — 301 — 314 B — 105 ms — http/1.1https://www.skyscanner.net/www.skyscanner.net/ https://www.skyscanner.net/ — 307 — 2.0 KiB — 131 ms — h2https://www.skyscanner.net/sttc/px/captcha-v2/index.html?url=Lz8=&uuid=518bc4d5-4c6c-11f1-bed8-de561741a3fe&vid=www.skyscanner.net/sttc/px/captcha-... https://www.skyscanner.net/sttc/px/captcha-v2/index.html?url=Lz8=&uuid=518bc4d5-4c6c-11f1-bed8-de561741a3fe&vid= — 200 — 1.3 KiB — 22 ms — h2https://www.skyscanner.net/sttc/px/captcha-v2/static/js/main.80db1e99.jswww.skyscanner.net/sttc/px/captcha-... https://www.skyscanner.net/sttc/px/captcha-v2/static/js/main.80db1e99.js — 200 — 83.5 KiB — 41 ms — h3https://www.skyscanner.net/sttc/px/captcha-v2/static/css/main.7b7617db.csswww.skyscanner.net/sttc/px/captcha-... https://www.skyscanner.net/sttc/px/captcha-v2/static/css/main.7b7617db.css — 200 — 4.2 KiB — 25 ms — h3https://www.skyscanner.net/sttc/px/captcha-v2/manifest.jsonwww.skyscanner.net/sttc/px/captcha-... https://www.skyscanner.net/sttc/px/captcha-v2/manifest.json — 200 — 806 B — 43 ms — h3https://www.skyscanner.net/sttc/px/captcha-v2/strings.jsonwww.skyscanner.net/sttc/px/captcha-... https://www.skyscanner.net/sttc/px/captcha-v2/strings.json — 200 — 22.6 KiB — 23 ms — h3https://js.skyscnr.com/sttc/px/captcha-v2/captcha-01.svgjs.skyscnr.com/sttc/px/captcha-v2/c... https://js.skyscnr.com/sttc/px/captcha-v2/captcha-01.svg — 200 — 14.3 KiB — 100 ms — h2https://www.skyscanner.net/favicon.icowww.skyscanner.net/favicon.ico https://www.skyscanner.net/favicon.ico — 200 — 32.7 KiB — 22 ms — h3https://www.skyscanner.net/rf8vapwA/captcha.js?a=captcha&m=0&u=518bc4d5-4c6c-11f1-bed8-de561741a3fe&v=www.skyscanner.net/rf8vapwA/captcha... https://www.skyscanner.net/rf8vapwA/captcha.js?a=captcha&m=0&u=518bc4d5-4c6c-11f1-bed8-de561741a3fe&v= — 200 — 263.6 KiB — 53 ms — h3https://client.px-cloud.net/PXrf8vapwA/main.min.jsclient.px-cloud.net/PXrf8vapwA/main... https://client.px-cloud.net/PXrf8vapwA/main.min.js — 200 — 95.4 KiB — 54 ms — h2https://tzm.px-cloud.net/ns?c=518bc4d5-4c6c-11f1-bed8-de561741a3fetzm.px-cloud.net/ns?c=518bc4d5-4c6c... https://tzm.px-cloud.net/ns?c=518bc4d5-4c6c-11f1-bed8-de561741a3fe — 200 — 302 B — 465 ms — http/1.1https://www.skyscanner.net/rf8vapwA/xhr/assets/js/bundlewww.skyscanner.net/rf8vapwA/xhr/ass... https://www.skyscanner.net/rf8vapwA/xhr/assets/js/bundle — 200 — 2.2 KiB — 177 ms — h3blob:https://www.skyscanner.net/3611bdc6-6afa-40d5-9d37-698a91fbd530www.skyscanner.net/3611bdc6-6afa-40... blob:https://www.skyscanner.net/3611bdc6-6afa-40d5-9d37-698a91fbd530 — -1 — 0 B — 0 ms — blob:https://www.skyscanner.net/6f0edb19-ea16-4c46-a8f4-cd4d065ad211www.skyscanner.net/6f0edb19-ea16-4c... blob:https://www.skyscanner.net/6f0edb19-ea16-4c46-a8f4-cd4d065ad211 — 200 — -1 B — 1.8 s — blobblob:https://www.skyscanner.net/40cbe9a7-691f-49fe-a8db-c546442463bdwww.skyscanner.net/40cbe9a7-691f-49... blob:https://www.skyscanner.net/40cbe9a7-691f-49fe-a8db-c546442463bd — 200 — -1 B — 1.9 s — blobhttps://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap — 200 — 2.9 KiB — 192 ms — h2https://www.skyscanner.net/rf8vapwA/captcha.js?a=captcha&m=0&u=518bc4d5-4c6c-11f1-bed8-de561741a3fe&v=www.skyscanner.net/rf8vapwA/captcha... https://www.skyscanner.net/rf8vapwA/captcha.js?a=captcha&m=0&u=518bc4d5-4c6c-11f1-bed8-de561741a3fe&v= — 200 — 0 B — 2 ms — h3https://client.px-cloud.net/PXrf8vapwA/main.min.jsclient.px-cloud.net/PXrf8vapwA/main... https://client.px-cloud.net/PXrf8vapwA/main.min.js — 200 — 0 B — 1 ms — h2https://crcldu.com/bd/sync.html?v=1778416200000crcldu.com/bd/sync.html?v=177841620... https://crcldu.com/bd/sync.html?v=1778416200000 — 200 — 1.0 KiB — 106 ms — h2https://js.px-cloud.net/?t=d-0y6d5ese5-1778416354205&v=518bc7ac-4c6c-11f1-bed8-b33201cd849ejs.px-cloud.net/?t=d-0y6d5ese5-1778... https://js.px-cloud.net/?t=d-0y6d5ese5-1778416354205&v=518bc7ac-4c6c-11f1-bed8-b33201cd849e — 200 — 1.1 KiB — 85 ms — h2https://collector-pxrf8vapwa.px-client.net/b/g?payload=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^i3ZGC3hTen9Xc1FqA1dnfktkW1xKBwdLfllRYENrX93B0amAEW0dBan1XdVRXY1RGYmF6AVkLYGJmBER/fwVdWwoGeX5lU3tIfFxLfQENMFSH0DXwRXaFBwWgdCHUVAfEYKZgN[rIGVF7fwYDS34EeFEGGQYDZx0GA39HYntweVFYUEcFeUIAeAIBVUpgB38ZcHRLDUFlVVGYKB`UVXWGV9HXGx7S11EXXda;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&appId=PXrf8vapwA&tag=TTE6NAtcJEJJOw==&uuid=518bc4d5-4c6c-11f1-bed8-de561741a3fe&ft=397&seq=1&en=NTA&bi=KDxfdH0DGlVuYD1RMWhhVykdTzM5MRJRJChOORJ5EXovGxpPbHcaSEZvLw8pGlYtKw4XSgA8HhdBOFw8O1AJCjcpXQ1kaG5ZOEsbLG0kQ1AkKxhUFS8edioVSUxyZlQ=&cs=0ae8aff9ec833df9fc8d9b33846068e48dbcae4ce67bfa5cbe40411e8d667e34&pc=5311958432012918&sid=51eeb827-4c6c-11f1-9402-65e9015b65bb%F3%A0%84%B1%F3%A0%84%B7%F3%A0%84%B7%F3%A0%84%B8%F3%A0%84%B4%F3%A0%84%B1%F3%A0%84%B6%F3%A0%84%B3%F3%A0%84%B5%F3%A0%84%B4%F3%A0%84%B0%F3%A0%84%B2%F3%A0%84%B0&vid=518bc7ac-4c6c-11f1-bed8-b33201cd849e&ci=51f22a40-4c6c-11f1-afc1-0188175856e5&pxhd=cWlvyY3Zq7D4yUlLmEVm0iESDtk6ENLHjUFCGSDECm4PoLeEW9Pc4VPi7/68GXbnASPsCM4u8Kw82hZVspf2Ng==:Fv9eL-kSqA9sEQqDZookHCjV-9WZoccDVNzIefgsZd-A3Wh5RuW6iLtg6FEW8VPRWw7z/9Mcbq-nJkckkYOINjL8UQlGgetOUW4tTjhduBU=&cts=51eee608-4c6c-11f1-9407-65e9015b65bb&hid=KtChucyUWGfJd-yr/K8z5cs7qyrtUfEKg77ArdVDfag=:jtzEXrSF2Im180RqIkrPEBCB-ExGsgYAZ1TDatJ1i0iCYGjVHFPYbnO2U5turUrCNjeEMDtQLsBurA2RTpfyfNJT8PFk-J-Qop1//fcdwCXyeoTsGvW7zMXe81RFPhaMxRx91U1AR3lOdI72/1J2cof8gurJ6w6kXufMPvZgFgwtcSGA0WpdTyvtcNyeTT9Jcollector-pxrf8vapwa.px-client.net/... https://collector-pxrf8vapwa.px-client.net/b/g?payload=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^i3ZGC3hTen9Xc1FqA1dnfktkW1xKBwdLfllRYENrX93B0amAEW0dBan1XdVRXY1RGYmF6AVkLYGJmBER/fwVdWwoGeX5lU3tIfFxLfQENMFSH0DXwRXaFBwWgdCHUVAfEYKZgN[rIGVF7fwYDS34EeFEGGQYDZx0GA39HYntweVFYUEcFeUIAeAIBVUpgB38ZcHRLDUFlVVGYKB`UVXWGV9HXGx7S11EXXda;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&appId=PXrf8vapwA&tag=TTE6NAtcJEJJOw==&uuid=518bc4d5-4c6c-11f1-bed8-de561741a3fe&ft=397&seq=1&en=NTA&bi=KDxfdH0DGlVuYD1RMWhhVykdTzM5MRJRJChOORJ5EXovGxpPbHcaSEZvLw8pGlYtKw4XSgA8HhdBOFw8O1AJCjcpXQ1kaG5ZOEsbLG0kQ1AkKxhUFS8edioVSUxyZlQ=&cs=0ae8aff9ec833df9fc8d9b33846068e48dbcae4ce67bfa5cbe40411e8d667e34&pc=5311958432012918&sid=51eeb827-4c6c-11f1-9402-65e9015b65bb%F3%A0%84%B1%F3%A0%84%B7%F3%A0%84%B7%F3%A0%84%B8%F3%A0%84%B4%F3%A0%84%B1%F3%A0%84%B6%F3%A0%84%B3%F3%A0%84%B5%F3%A0%84%B4%F3%A0%84%B0%F3%A0%84%B2%F3%A0%84%B0&vid=518bc7ac-4c6c-11f1-bed8-b33201cd849e&ci=51f22a40-4c6c-11f1-afc1-0188175856e5&pxhd=cWlvyY3Zq7D4yUlLmEVm0iESDtk6ENLHjUFCGSDECm4PoLeEW9Pc4VPi7/68GXbnASPsCM4u8Kw82hZVspf2Ng==:Fv9eL-kSqA9sEQqDZookHCjV-9WZoccDVNzIefgsZd-A3Wh5RuW6iLtg6FEW8VPRWw7z/9Mcbq-nJkckkYOINjL8UQlGgetOUW4tTjhduBU=&cts=51eee608-4c6c-11f1-9407-65e9015b65bb&hid=KtChucyUWGfJd-yr/K8z5cs7qyrtUfEKg77ArdVDfag=:jtzEXrSF2Im180RqIkrPEBCB-ExGsgYAZ1TDatJ1i0iCYGjVHFPYbnO2U5turUrCNjeEMDtQLsBurA2RTpfyfNJT8PFk-J-Qop1//fcdwCXyeoTsGvW7zMXe81RFPhaMxRx91U1AR3lOdI72/1J2cof8gurJ6w6kXufMPvZgFgwtcSGA0WpdTyvtcNyeTT9J — 200 — 1.0 KiB — 210 ms — h2https://crcldu.com/bd/auditor.js?v=1778416320000crcldu.com/bd/auditor.js?v=17784163... https://crcldu.com/bd/auditor.js?v=1778416320000 — 200 — 152.2 KiB — 71 ms — h2https://www.skyscanner.net/rf8vapwA/xhr/assets/js/bundlewww.skyscanner.net/rf8vapwA/xhr/ass... https://www.skyscanner.net/rf8vapwA/xhr/assets/js/bundle — 200 — 1.7 KiB — 177 ms — h3https://fst-ec.perimeterx.net/?id=518bc7ac-4c6c-11f1-bed8-b33201cd849efst-ec.perimeterx.net/?id=518bc7ac-... https://fst-ec.perimeterx.net/?id=518bc7ac-4c6c-11f1-bed8-b33201cd849e — 200 — 1.6 KiB — 58 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 5698ms · 85KB · $76/mo
client.px-cloud.net
Other
Costly
Execution 3190ms
Transfer 0 KB
Unused 30%
Monthly Cost $42/mo
www.skyscanner.net
Other
Costly
Execution 1844ms
Transfer 0 KB
Unused 17%
Monthly Cost $24/mo
Unattributable
Other
Costly
Execution 412ms
Transfer 0 KB
Monthly Cost $5/mo
www.skyscanner.net
Other
Optional
Execution 150ms
Transfer 84 KB
Unused 42%
Monthly Cost $2/mo
www.skyscanner.net
Other
Optional
Execution 103ms
Transfer 1 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • client.px-cloud.net adds 3190ms and costs ~$42/month
  • www.skyscanner.net adds 1844ms and costs ~$24/month
  • Unattributable adds 412ms and costs ~$5/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

client.px-cloud.net takes 3190ms 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.skyscanner.net takes 1844ms 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 412ms 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

Image Optimization
1 images, 14 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

1

Total Size

14 KB

1 missing alt text 1 missing dimensions
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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