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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
69
GRADE
D
FIX
5
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
91
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.
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.

838 ms

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

1.23 s

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

114 ms

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

0.090

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

1.59 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.

3.76 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 2 REVIEW 5 FIX
F
Page Weight Budget
Action
3.1 MB transferred, 99 requests
FIX
3.1 MB transferred, 99 requests
Warning::
Page weighs 8.0 MB (3.1 MB transferred)
Warning::
JavaScript is 1.7 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.7 MB
Warning::
Images are 1.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.2 MB
Info::
99 HTTP requests
Info::
Estimated 0.66 g CO2 per page load
3.1 MB / 2.4 MB budget
3.1 MB transferred
99 requests
0.66 g CO2 per page load
JavaScript 1.7 MiB 55%
Images 1.2 MiB 37%
CSS 101.5 KiB 3%
Fonts 55.9 KiB 2%
Other 25.9 KiB 1%
Other 24.1 KiB 1%
HTML 20.9 KiB 1%
Other 15.4 KiB 0%
Other 558 B 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

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 (3.1 MiB of 3.1 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
F
JS Bundles
Action
31 scripts, 806 KB unused
FIX
31 scripts, 806 KB unused
Warning::
https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml...: 122 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://aacr.silverchair-cdn.com/Themes/Client/app...: 104 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 100 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PQ4...: 67 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-5B3...: 66 KB unused (59%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 806 KB
806 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js251 KB122 KB (49%)✓3rd
https://aacr.silverchair-cdn.com/Themes/Client/app/jsdist/v-639116337507511173/site.min.js133 KB104 KB (79%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js188 KB100 KB (53%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PQ4CDD2111 KB67 KB (60%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5B3WW8F5113 KB66 KB (59%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-K39SQDNT115 KB66 KB (57%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-H8RVJMMDF7&cx=c&_slc=1148 KB65 KB (44%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-C8E9HV22QS&cx=c&gtm=4e64k0157 KB61 KB (39%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-57J8MM3135 KB60 KB (45%)✓3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js57 KB38 KB (67%)✓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

F
Page Weight Inventory
Action
99 resources · 3.1 MB · 806 KB savings available
FIX
99 resources · 3.1 MB · 806 KB savings available
Warning::
Page weight 2.1 MB over 1MB target
Got: 3.1 MB Expected: ≤ 1 MB
Info::
~806 KB of savings available
Warning::
95 third-party resources (99% of weight)
Info::
1 resources over 200KB
99 resources · 3.1 MiB · 95 third-party 2.1 MiB over 1MB target
JavaScript 55% · 1.7 MiB
Image 38% · 1.2 MiB
CSS 3% · 101.5 KiB
Other 2% · 63.3 KiB
Font 2% · 55.9 KiB
Document 1% · 20.9 KiB

~806.1 KiB of savings available

Remove unused JavaScript: 806.1 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
Image Optimization
Action
39 images, 0 KB saveable
REVIEW
39 images, 0 KB saveable
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/data/SiteBuilderA... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/data/SiteBuilderA... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://aacr.silverchair-cdn.com/ImageLibrary/umbr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
39 images 1.2 MB
0 oversized -0 KB
38 legacy format
25 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

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

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

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

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

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

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

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

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

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

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

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

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
JS Execution Cost
Action
1033ms total JS execution
REVIEW
1033ms total JS execution
Info::
Unattributable: 154ms CPU time
Info::
https://ajax.googleapis.com/ajax/libs/jquery/3.4.1...: 121ms CPU time
Info::
https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml...: 118ms CPU time
Info::
https://securepubads.g.doubleclick.net/pagead/mana...: 109ms CPU time
Info::
https://aacrjournals.org/: 94ms CPU time
Warning::
Third-party scripts: 882ms (85% of total)

Main Thread Breakdown

Script Evaluation 62% Other 13% Script Parsing & Compilation 12% Style & Layout 8%
ScriptTotalScriptingParse/CompileParty
Unattributable154ms6ms0ms3rd
https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js121ms84ms2ms3rd
https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js118ms87ms31ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js109ms82ms16ms3rd
https://aacrjournals.org/94ms15ms2ms1st
https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js89ms70ms6ms3rd
https://aacr.silverchair-cdn.com/Themes/Client/app/jsdist/v-639116337507511173/site.min.js77ms21ms17ms3rd
https://www.googletagmanager.com/gtag/js?id=G-H8RVJMMDF7&cx=c&_slc=177ms66ms9ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-57J8MM369ms57ms10ms3rd
https://www.googletagmanager.com/gtag/js?id=G-C8E9HV22QS&cx=c&gtm=4e64k069ms58ms10ms3rd

Showing top 10 of 11 scripts

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
2 fonts (56 KB)
PASS
2 fonts (56 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

56 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 838 ms LCP 1.2 shttps://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2JTUSjIg1_i6t8kCHKm459Wl... https://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2 — 34.7 KiB — 35 ms — font-display: swaphttps://aacr.silverchair-cdn.com/Themes/Silver/app/icons/v-639102489936978178/fonts/white-label.ttf?7yqv1cwhite-label.ttf https://aacr.silverchair-cdn.com/Themes/Silver/app/icons/v-639102489936978178/fonts/white-label.ttf?7yqv1c — 21.2 KiB — 60 ms — font-display: swap
JTUSjIg1_i6t8kCHKm459Wl... woff2 swap
Size 35 KB
Load time 35 ms
Start 811 ms
Risk FOUT — text flashes from fallback to web font
white-label.ttf ttf swap
Size 21 KB
Load time 60 ms
Start 812 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~6 KB and ~12 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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
99 requests over 2906ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 838 ms LCP 1.2 shttps://aacrjournals.org// https://aacrjournals.org/ — 200 — 12.1 KiB — 594 ms — h2https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.jsajax.googleapis.com/ajax/libs/jquer... https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js — 200 — 30.7 KiB — 96 ms — h2https://aacr.silverchair-cdn.com/Themes/Silver/app/vendor/v-639102489972463725/jquery-migrate-3.1.0.min.jsaacr.silverchair-cdn.com/Themes/Sil... https://aacr.silverchair-cdn.com/Themes/Silver/app/vendor/v-639102489972463725/jquery-migrate-3.1.0.min.js — 200 — 3.9 KiB — 89 ms — h2https://aacr.silverchair-cdn.com/Themes/Client/app/css/v-639116336388584864/site.min.cssaacr.silverchair-cdn.com/Themes/Cli... https://aacr.silverchair-cdn.com/Themes/Client/app/css/v-639116336388584864/site.min.css — 200 — 96.7 KiB — 83 ms — h2https://aacr.silverchair-cdn.com/Themes/Silver/app/icons/v-639102489936978178/style.cssaacr.silverchair-cdn.com/Themes/Sil... https://aacr.silverchair-cdn.com/Themes/Silver/app/icons/v-639102489936978178/style.css — 200 — 1.9 KiB — 85 ms — h2https://aacr.silverchair-cdn.com/Themes/Client/app/css/v-639102487800924731/bg_img.cssaacr.silverchair-cdn.com/Themes/Cli... https://aacr.silverchair-cdn.com/Themes/Client/app/css/v-639102487800924731/bg_img.css — 200 — 657 B — 86 ms — h2https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&display=swapfonts.googleapis.com/css2?family=Mo... https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&display=swap — 200 — 1.2 KiB — 99 ms — h2https://aacr.silverchair-cdn.com/data/SiteBuilderAssets/Live/CSS/umbrella/v-638803291138127560/site.cssaacr.silverchair-cdn.com/data/SiteB... https://aacr.silverchair-cdn.com/data/SiteBuilderAssets/Live/CSS/umbrella/v-638803291138127560/site.css — 200 — 992 B — 86 ms — h2https://widgets.figshare.com/static/figshare.jswidgets.figshare.com/static/figshar... 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h2https://aacr.silverchair-cdn.com/ImageLibrary/umbrella/spotlight/Simul-Pubs-417x226.jpg?versionId=8822aacr.silverchair-cdn.com/ImageLibra... https://aacr.silverchair-cdn.com/ImageLibrary/umbrella/spotlight/Simul-Pubs-417x226.jpg?versionId=8822 — 200 — 19.6 KiB — 22 ms — h2https://aacr.silverchair-cdn.com/ImageLibrary/umbrella/spotlight/PUBFeatArtic_JournalAwardee.jpg?versionId=8908aacr.silverchair-cdn.com/ImageLibra... https://aacr.silverchair-cdn.com/ImageLibrary/umbrella/spotlight/PUBFeatArtic_JournalAwardee.jpg?versionId=8908 — 200 — 108.4 KiB — 50 ms — h2https://aacr.silverchair-cdn.com/Themes/Client/app/jsdist/v-639116337507511173/site.min.jsaacr.silverchair-cdn.com/Themes/Cli... https://aacr.silverchair-cdn.com/Themes/Client/app/jsdist/v-639116337507511173/site.min.js — 200 — 132.8 KiB — 47 ms — h2https://aacr.silverchair-cdn.com/aacr/scm.proxylogging.jsaacr.silverchair-cdn.com/aacr/scm.p... https://aacr.silverchair-cdn.com/aacr/scm.proxylogging.js — 200 — 823 B — 97 ms — 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https://stats.g.doubleclick.net/g/collect?v=2&tid=G-H8RVJMMDF7&cid=242508680.1776888465&gtm=45je64k0v9126203288za20g&rcb=15&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l3l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266400~117512542~118463261 — 204 — 558 B — 71 ms — h2https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-H8RVJMMDF7&cid=242508680.1776888465&gtm=45je64k0v9126203288za20g&rcb=15&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l3l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266400~117512542~118463261&z=124712127www.google.es/ads/ga-audiences?v=1&... https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-H8RVJMMDF7&cid=242508680.1776888465&gtm=45je64k0v9126203288za20g&rcb=15&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l3l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266400~117512542~118463261&z=124712127 — 200 — 408 B — 75 ms — h2https://pagead2.googlesyndication.com/pagead/gen_204?id=av-js&type=fle-fetch-start2pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/gen_204?id=av-js&type=fle-fetch-start2 — 204 — 20 B — 87 ms — h3https://pagead2.googlesyndication.com/pagead/gen_204?id=av-js&type=colleague-executed&name=4pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/gen_204?id=av-js&type=colleague-executed&name=4 — 204 — 20 B — 89 ms — h3https://pagead2.googlesyndication.com/pagead/gen_204?id=av-js&type=reach&proto=CAlgAWgDpagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/gen_204?id=av-js&type=reach&proto=CAlgAWgD — 204 — 20 B — 61 ms — h3https://pagead2.googlesyndication.com/pcs/view?xai=AKAOjsuhN8hUByeNIljIQMnMALB0XsR1LYnL_26o_zERWLDsqB-uUbM0V9TBEUR3zEnynfBJz3TtGGypdbHBr87ST653mOl9xSljFuaAuCjKSWw0IqVyewpfmQkRQ0LAk6Az9GmcitE83-CcyqCzJPgnoqZVdXYWai7SMiMlkxtP9PRDgP2AXIa3eH3gFQ4WvJ84w0pSekHA0iJmIFAeoWHxN5carVAMrJ_WFO6vN91asf3AkPODuYz2bDk6eq_SUDN0iU7yu5PXWCcU3k_H6_UcnAkHIfd3FFHiQW-sFalI5In4tI-Js-ycUkGG2D9yWfbgOPhs-oPWIk6klSKrBANeFJclId3Wl2Rf76SK_P6H-c2Dz4JqxQTLTUYZVGEsJ0XGzr15mYhyktikirQLtwhunWVlVYZMtMk&sig=Cg0ArKJSzBwteORrMkxmEAE&uach_m=%5BUACH%5D&dett=2&adurl=pagead2.googlesyndication.com/pcs/v... https://pagead2.googlesyndication.com/pcs/view?xai=AKAOjsuhN8hUByeNIljIQMnMALB0XsR1LYnL_26o_zERWLDsqB-uUbM0V9TBEUR3zEnynfBJz3TtGGypdbHBr87ST653mOl9xSljFuaAuCjKSWw0IqVyewpfmQkRQ0LAk6Az9GmcitE83-CcyqCzJPgnoqZVdXYWai7SMiMlkxtP9PRDgP2AXIa3eH3gFQ4WvJ84w0pSekHA0iJmIFAeoWHxN5carVAMrJ_WFO6vN91asf3AkPODuYz2bDk6eq_SUDN0iU7yu5PXWCcU3k_H6_UcnAkHIfd3FFHiQW-sFalI5In4tI-Js-ycUkGG2D9yWfbgOPhs-oPWIk6klSKrBANeFJclId3Wl2Rf76SK_P6H-c2Dz4JqxQTLTUYZVGEsJ0XGzr15mYhyktikirQLtwhunWVlVYZMtMk&sig=Cg0ArKJSzBwteORrMkxmEAE&uach_m=%5BUACH%5D&dett=2&adurl= — 200 — 26 B — 60 ms — h3https://ep1.adtrafficquality.google/getconfig/sodar?sv=200&tid=gpt&tv=m202604160201&st=env&sjk=5962501995978284ep1.adtrafficquality.google/getconf... https://ep1.adtrafficquality.google/getconfig/sodar?sv=200&tid=gpt&tv=m202604160201&st=env&sjk=5962501995978284 — 200 — 13.4 KiB — 87 ms — h3https://polo.feathr.co/v1/analytics/match/script.js?a_id=6581c0624de07db509308560&pk=feathrpolo.feathr.co/v1/analytics/match/s... https://polo.feathr.co/v1/analytics/match/script.js?a_id=6581c0624de07db509308560&pk=feathr — 200 — 447 B — 240 ms — h2https://polo.feathr.co/v1/accounts/6581c0624de07db509308560/pixel.js?pk=feathrpolo.feathr.co/v1/accounts/6581c062... https://polo.feathr.co/v1/accounts/6581c0624de07db509308560/pixel.js?pk=feathr — 200 — 651 B — 144 ms — h2https://extend.vimeocdn.com/ga/59090698.jsextend.vimeocdn.com/ga/59090698.js https://extend.vimeocdn.com/ga/59090698.js — 200 — 5.8 KiB — 32 ms — h2https://aacr.silverchair-cdn.com/data/SiteBuilderAssets/Live/Images/umbrella/favicon-1200069261.icoaacr.silverchair-cdn.com/data/SiteB... https://aacr.silverchair-cdn.com/data/SiteBuilderAssets/Live/Images/umbrella/favicon-1200069261.ico — 200 — 2.5 KiB — 20 ms — h2https://ep2.adtrafficquality.google/sodar/sodar2.jsep2.adtrafficquality.google/sodar/s... https://ep2.adtrafficquality.google/sodar/sodar2.js — 200 — 7.9 KiB — 95 ms — h2https://ep2.adtrafficquality.google/sodar/sodar2/254/runner.htmlep2.adtrafficquality.google/sodar/s... https://ep2.adtrafficquality.google/sodar/sodar2/254/runner.html — 200 — 5.8 KiB — 71 ms — h2https://match.adsrvr.org/track/cmf/generic?gdpr=0&ttd_passthrough=a_id%3D6581c0624de07db509308560&ttd_pid=6fgi4r1&ttd_puid=69e92a913ccf236635a415e5&ttd_tpi=1match.adsrvr.org/track/cmf/generic?... https://match.adsrvr.org/track/cmf/generic?gdpr=0&ttd_passthrough=a_id%3D6581c0624de07db509308560&ttd_pid=6fgi4r1&ttd_puid=69e92a913ccf236635a415e5&ttd_tpi=1 — 200 — 149 B — 131 ms — h2https://pagead2.googlesyndication.com/bg/RiK6ZWktSJHFoyfG9cjH9nLRaZ1B3RgkbmOlM6XvCcc.jspagead2.googlesyndication.com/bg/Ri... https://pagead2.googlesyndication.com/bg/RiK6ZWktSJHFoyfG9cjH9nLRaZ1B3RgkbmOlM6XvCcc.js — 200 — 21.8 KiB — 80 ms — h3https://ep2.adtrafficquality.google/generate_204?CtxMdQep2.adtrafficquality.google/generat... https://ep2.adtrafficquality.google/generate_204?CtxMdQ — 204 — 40 B — 24 ms — h2https://ep1.adtrafficquality.google/pagead/sodar?id=sodar2&v=254&t=2&li=gpt_m202604160201&jk=5962501995978284&bg=!zc6lzqzNAAa1ilLUlYo7AEcBe5WfONnAEvUYvWap6K4pgjZBzm9vg_kf1FbZUZiEhEhLn1j9g8g4Q5G_nEksjtpFd7Crqp0KxsOvxphi6WHN_wA8AlGAkAIAAABPUgAAAAdoAQd-ADfmfpz8hE7eoAdA2rCS2p9X_GE1Gpn27dNrJO9kVuizkJCC-iSQkXUls3f-ZSfZGZVmJLPL1FfXmQKfHtn3H7-ghyGiA6KbmIn9RNERFLJ9_3tRZy9yQrkeL5boxrthu5dHixpFpqYSD_V_NtFu4qgDtI36qUSlRghURapazp8tIdy9MnaRrpO3Xc0Mq7jTSLDYiOe8VABpdh8xCoSg9hqyMkOu3JzcgmMy-eVC6AYbsm_37w4nNEF_y_uvg86Avbr69c1gnuGVH6x3-v3tNNPmZtBElRHBKOWLDIaBtdlEDponVcd8pAKvbY9o8NgxIB9vZoD5pEeJOsxB6vYFU9QwpHJAXX4df0bv8GLZHnhYAtdg6ddxuqx9rpgrD-BITCpqIqlSkq2l9-poMtm0YVDj6Odf7x8rByYXDZl2G4RCtgd5I9NqzKYhjjti8WeIN9sv1P3-Guf1FH7tWKWJwA46whi8b0rlUObsx5_uqtj_saKMvb6tq8gCr-JrzZal7LOeKoOkfL6SjxV-vJ-itVHpBkWsBH2UyQi56Q-Gg9a3zHBcbNVR0hShYHZ02jZnp-SaaPauyNF7OMZCXnrgCBV0zdvUbw-yV1bvuWoKXm_fENRBim9LSjU_Wx6QuaEGYIv99ExBCCL3cmdKwrctoZ3-EnGG_ez0HEA9ITljdxPBvz4ffhRZSaTZu87ycCg3DM9brjHrhl_40YyjlRmOFK_B6jvenuJdVy3uH8-k5naqIXBXJ7G-T_1gBXUs38d4eWUnzaygG7_KGF6ARcK-vhqbO247WCWNskVvhFeahUmAVnvH-KnwtD39XIw1shoLAvvjetlEnbiHmxIEUsKAWUGaTin-rvnnMFIKLOBhlIGpj5ttr-49NkM6Te7xYBBPC2ct1VsmmtWN9mxQdFQBqJ8TsSkRnQ7gmWzhzliB26EyjH5y7knO_HjEuo-DmsA_ko95gGi9X9Kcrukep1.adtrafficquality.google/pagead/... https://ep1.adtrafficquality.google/pagead/sodar?id=sodar2&v=254&t=2&li=gpt_m202604160201&jk=5962501995978284&bg=!zc6lzqzNAAa1ilLUlYo7AEcBe5WfONnAEvUYvWap6K4pgjZBzm9vg_kf1FbZUZiEhEhLn1j9g8g4Q5G_nEksjtpFd7Crqp0KxsOvxphi6WHN_wA8AlGAkAIAAABPUgAAAAdoAQd-ADfmfpz8hE7eoAdA2rCS2p9X_GE1Gpn27dNrJO9kVuizkJCC-iSQkXUls3f-ZSfZGZVmJLPL1FfXmQKfHtn3H7-ghyGiA6KbmIn9RNERFLJ9_3tRZy9yQrkeL5boxrthu5dHixpFpqYSD_V_NtFu4qgDtI36qUSlRghURapazp8tIdy9MnaRrpO3Xc0Mq7jTSLDYiOe8VABpdh8xCoSg9hqyMkOu3JzcgmMy-eVC6AYbsm_37w4nNEF_y_uvg86Avbr69c1gnuGVH6x3-v3tNNPmZtBElRHBKOWLDIaBtdlEDponVcd8pAKvbY9o8NgxIB9vZoD5pEeJOsxB6vYFU9QwpHJAXX4df0bv8GLZHnhYAtdg6ddxuqx9rpgrD-BITCpqIqlSkq2l9-poMtm0YVDj6Odf7x8rByYXDZl2G4RCtgd5I9NqzKYhjjti8WeIN9sv1P3-Guf1FH7tWKWJwA46whi8b0rlUObsx5_uqtj_saKMvb6tq8gCr-JrzZal7LOeKoOkfL6SjxV-vJ-itVHpBkWsBH2UyQi56Q-Gg9a3zHBcbNVR0hShYHZ02jZnp-SaaPauyNF7OMZCXnrgCBV0zdvUbw-yV1bvuWoKXm_fENRBim9LSjU_Wx6QuaEGYIv99ExBCCL3cmdKwrctoZ3-EnGG_ez0HEA9ITljdxPBvz4ffhRZSaTZu87ycCg3DM9brjHrhl_40YyjlRmOFK_B6jvenuJdVy3uH8-k5naqIXBXJ7G-T_1gBXUs38d4eWUnzaygG7_KGF6ARcK-vhqbO247WCWNskVvhFeahUmAVnvH-KnwtD39XIw1shoLAvvjetlEnbiHmxIEUsKAWUGaTin-rvnnMFIKLOBhlIGpj5ttr-49NkM6Te7xYBBPC2ct1VsmmtWN9mxQdFQBqJ8TsSkRnQ7gmWzhzliB26EyjH5y7knO_HjEuo-DmsA_ko95gGi9X9Kcruk — 204 — 17 B — 59 ms — h3https://pagead2.googlesyndication.com/pcs/activeview?xai=AKAOjssOfp4A05nJKLN0OgQCrf7bPvRXWCRH-nUZqAjRc1qWHWl4IJTXzjWbSWLLfkkD68ayUEa_gXgek7-SGTe9KH3y1Bv3QY6q0X9k7Z-h9xmsIasB4zTU6r7-vkJ4ViRavcI3xmZ3alEobfW3SiC6tGWpdrMmNokUBhuqhNRVXaJcwMTqLXUvmzkaAw&sig=Cg0ArKJSzEr0kixzDIXYEAE&id=lidar2&mcvt=1000&p=14,311,104,1039&tm=1052.8999996185303&tu=52.5&mtos=1000,1000,1000,1000,1000&tos=1000,0,0,0,0&v=20260420&bin=7&avms=nio&bs=1350,940&mc=1&vu=1&app=0&itpl=0&adk=179420433&rs=4&la=0&cr=0&uach=WyJtYWNPUyIsIjEwLjE1LjciLCJ4ODYiLCIiLCIxNDcuMC4wLjAiLG51bGwsMCxudWxsLCI2NCIsW1siQ2hyb21pdW0iLCIxNDcuMC43NzI3LjEwMSJdLFsiTm90LkEvQnJhbmQiLCI4LjAuMC4wIl1dLDBd&vs=4&r=v&co=7282126500&rst=1776888464897&rpt=203&isd=0&lsd=0&met=mue&wmsd=0&pbe=0&fle=0&vae=0&spb=0&sfl=0&ffslot=0&reach=8&io2=0pagead2.googlesyndication.com/pcs/a... https://pagead2.googlesyndication.com/pcs/activeview?xai=AKAOjssOfp4A05nJKLN0OgQCrf7bPvRXWCRH-nUZqAjRc1qWHWl4IJTXzjWbSWLLfkkD68ayUEa_gXgek7-SGTe9KH3y1Bv3QY6q0X9k7Z-h9xmsIasB4zTU6r7-vkJ4ViRavcI3xmZ3alEobfW3SiC6tGWpdrMmNokUBhuqhNRVXaJcwMTqLXUvmzkaAw&sig=Cg0ArKJSzEr0kixzDIXYEAE&id=lidar2&mcvt=1000&p=14,311,104,1039&tm=1052.8999996185303&tu=52.5&mtos=1000,1000,1000,1000,1000&tos=1000,0,0,0,0&v=20260420&bin=7&avms=nio&bs=1350,940&mc=1&vu=1&app=0&itpl=0&adk=179420433&rs=4&la=0&cr=0&uach=WyJtYWNPUyIsIjEwLjE1LjciLCJ4ODYiLCIiLCIxNDcuMC4wLjAiLG51bGwsMCxudWxsLCI2NCIsW1siQ2hyb21pdW0iLCIxNDcuMC43NzI3LjEwMSJdLFsiTm90LkEvQnJhbmQiLCI4LjAuMC4wIl1dLDBd&vs=4&r=v&co=7282126500&rst=1776888464897&rpt=203&isd=0&lsd=0&met=mue&wmsd=0&pbe=0&fle=0&vae=0&spb=0&sfl=0&ffslot=0&reach=8&io2=0 — 200 — 65 B — 58 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
85% of JavaScript execution is third-party
First-party Third-party 882ms · 1115KB · $12/mo
Unattributable
Other
Optional
Execution 154ms
Transfer 0 KB
Monthly Cost $2/mo
ajax.googleapis.com
Other
Optional
Execution 121ms
Transfer 31 KB
Monthly Cost $2/mo
jsDelivr
CDN
Optional
Execution 118ms
Transfer 251 KB
Unused 49%
Monthly Cost $2/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 109ms
Transfer 188 KB
Unused 53%
Monthly Cost $1/mo
pagead2.googlesyndication.com
Other
Optional
Execution 89ms
Transfer 73 KB
Unused 42%
Monthly Cost $1/mo
aacr.silverchair-cdn.com
Other
Optional
Execution 77ms
Transfer 133 KB
Unused 79%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 77ms
Transfer 148 KB
Unused 44%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 69ms
Transfer 135 KB
Unused 45%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 69ms
Transfer 157 KB
Unused 39%
Monthly Cost $1/mo

85% 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

53% of securepubads.g.doubleclick.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

79% of aacr.silverchair-cdn.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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