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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
4
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
46
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.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

5.43 s

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

26.13 s

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

307 ms

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

0.186

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

5.53 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.

26.77 s

Page Load Progression

471 ms
943 ms
1.4 s
1.9 s
2.4 s
2.8 s
3.3 s
3.8 s
Checks
17
7 PASS 4 REVIEW 4 FIX
F
Page Weight Budget
Action
4.7 MB transferred, 107 requests
FIX
4.7 MB transferred, 107 requests
Critical::
Page weighs 8.8 MB (4.7 MB transferred)
Warning::
Images are 3.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.0 MB
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Warning::
107 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.99 g CO2 per page load
4.7 MB / 2.4 MB budget
4.7 MB transferred
107 requests
0.99 g CO2 per page load
Images 3.0 MiB 64%
JavaScript 1.2 MiB 26%
Fonts 197.2 KiB 4%
CSS 151.2 KiB 3%
HTML 91.6 KiB 2%
Other 50.2 KiB 1%
Other 1.7 KiB 0%
Other 572 B 0%
Other 551 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
JS Execution Cost
Action
2295ms total JS execution
FIX
2295ms total JS execution
Warning::
https://www.fullerton.edu/: 595ms CPU time
Warning::
Unattributable: 460ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-F236...: 341ms CPU time
Warning::
https://script.crazyegg.com/pages/versioned/common...: 307ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-MWZ...: 143ms CPU time
Warning::
Third-party scripts: 1322ms (58% of total)

Main Thread Breakdown

Script Evaluation 42% Other 31% Style & Layout 11% Rendering 7% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://www.fullerton.edu/595ms4ms2ms1st
Unattributable460ms6ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-F236HL21QV&cx=c&gtm=4e64k0341ms294ms44ms3rd
https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js307ms271ms19ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MWZNRQSL143ms112ms30ms3rd
https://www.fullerton.edu/_resources/js/udm-dom.js107ms59ms26ms1st
https://www.fullerton.edu/_resources/js/modernizr.js102ms51ms2ms1st
https://www.fullerton.edu/_resources/js/jquery-3.6.0.min.js90ms70ms9ms1st
https://www.fullerton.edu/_resources/js/podcast.js?v=1.0180ms52ms0ms1st
https://www.google-analytics.com/analytics.js70ms42ms4ms3rd
D
JS Bundles
Action
33 scripts, 155 KB unused
FIX
33 scripts, 155 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-MWZ...: 64 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-F236...: 61 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://script.crazyegg.com/pages/versioned/common...: 29 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.fullerton.edu/_resources/js/page_featu...: unminified — 3 KB could be saved
Info::
Total unused JavaScript: 155 KB
155 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-MWZNRQSL121 KB64 KB (53%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-F236HL21QV&cx=c&gtm=4e64k0176 KB61 KB (35%)✓3rd
https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js55 KB29 KB (53%)✓3rd
https://www.fullerton.edu/_resources/js/page_features.js?v=1.114 KB—✗1st
https://script.crazyegg.com/pages/scripts/0047/9029.js?4935813 KB—✓3rd
https://www.fullerton.edu/_resources/js/document.ready.js?v=1.12 KB—✓1st
https://www.fullerton.edu/_resources/js/mobile.js1 KB—✓1st
https://www.fullerton.edu/_resources/js/ajax_base.js?v=1.14 KB—✓1st
https://www.fullerton.edu/_resources/js/GoogleTagManager.js1 KB—✓1st
https://www.fullerton.edu/_resources/js/udm-custom.js3 KB—✗1st

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

D
Page Weight Inventory
Action
107 resources · 4.7 MB · 155 KB savings available
FIX
107 resources · 4.7 MB · 155 KB savings available
Warning::
Page weight 3.7 MB over 1MB target
Got: 4.7 MB Expected: ≤ 1 MB
Info::
~155 KB of savings available
Warning::
44 third-party resources (42% of weight)
Info::
6 resources over 200KB
107 resources · 4.7 MiB · 44 third-party 3.7 MiB over 1MB target
Image 64% · 3.0 MiB
JavaScript 26% · 1.2 MiB
Font 4% · 197.2 KiB
CSS 3% · 151.2 KiB
Document 2% · 91.6 KiB
Other 1% · 51.3 KiB

~154.8 KiB of savings available

Remove unused JavaScript: 154.8 KiB
B
Third-Party Impact
42% third-party, 0 ms blocking
REVIEW
42% third-party, 0 ms blocking
Info::
Third-party code accounts for 42% of page weight (2.0 MiB of 4.7 MiB)
Info::
Third-party blocking time is low (0 ms)
58%
42%
First-party Third-party
C
Image Optimization
Action
34 images, 0 KB saveable
REVIEW
34 images, 0 KB saveable
Warning::
https://news.fullerton.edu/app/uploads/2026/03/Lui... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.fullerton.edu/app/uploads/2026/02/CSU... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fullerton.edu/_resources/images/core/C... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fullerton.edu/_resources/images/icons/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fullerton.edu/_resources/images/core/C... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fullerton.edu/_resources/images/misc/E... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.fullerton.edu/app/uploads/2026/04/CSU... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.fullerton.edu/app/uploads/2026/04/CSU... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fullerton.edu/_resources/images/misc/E... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.fullerton.edu/app/uploads/2026/03/Cyb... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fullerton.edu/_resources/images/misc/E... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
34 images 3.0 MB
0 oversized -0 KB
33 legacy format
11 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

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

Green Hosting

No green hosting detected

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

private

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
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
8 fonts (197 KB)
PASS
8 fonts (197 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

197 KB total

Render-blocking

0

of 8

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s FCP 5.4 s LCP 26.1 shttps://www.fullerton.edu/_resources/fonts/roboto-v15-latin-regular.woff2roboto-v15-latin-regula... https://www.fullerton.edu/_resources/fonts/roboto-v15-latin-regular.woff2 — 14.6 KiB — 266 ms — font-display: swaphttps://www.fullerton.edu/_resources/fonts/roboto-v15-latin-500.woff2roboto-v15-latin-500.woff2 https://www.fullerton.edu/_resources/fonts/roboto-v15-latin-500.woff2 — 14.6 KiB — 309 ms — font-display: swaphttps://www.fullerton.edu/_resources/fonts/icomoon.wofficomoon.woff https://www.fullerton.edu/_resources/fonts/icomoon.woff — 1.2 KiB — 303 ms — font-display: swaphttps://www.fullerton.edu/_resources/fonts/roboto-v15-latin-900.woff2roboto-v15-latin-900.woff2 https://www.fullerton.edu/_resources/fonts/roboto-v15-latin-900.woff2 — 14.5 KiB — 320 ms — font-display: swaphttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/fonts/fontawesome-webfont.woff2?v=4.7.0fontawesome-webfont.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/fonts/fontawesome-webfont.woff2?v=4.7.0 — 76.0 KiB — 70 ms — font-display: swaphttps://www.fullerton.edu/_resources/fonts/texgyreschola-regular-webfont.wofftexgyreschola-regular-w... https://www.fullerton.edu/_resources/fonts/texgyreschola-regular-webfont.woff — 28.1 KiB — 344 ms — font-display: swaphttps://www.fullerton.edu/_resources/fonts/crimson-text-v6-latin-regular.woff2crimson-text-v6-latin-r... https://www.fullerton.edu/_resources/fonts/crimson-text-v6-latin-regular.woff2 — 14.3 KiB — 344 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 76 ms — font-display: swap
roboto-v15-latin-regula... woff2 swap
Size 15 KB
Load time 266 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
roboto-v15-latin-500.woff2 woff2 swap
Size 15 KB
Load time 309 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
icomoon.woff woff swap
Size 1 KB
Load time 303 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
roboto-v15-latin-900.woff2 woff2 swap
Size 15 KB
Load time 320 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
fontawesome-webfont.woff2 unknown swap
Size 76 KB
Load time 70 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
texgyreschola-regular-w... woff swap
Size 28 KB
Load time 344 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
crimson-text-v6-latin-r... woff2 swap
Size 14 KB
Load time 344 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 76 ms
Start 2.0 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 ~32 KB and ~64 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
107 requests over 5187ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s FCP 5.4 s LCP 26.1 shttps://www.fullerton.edu// https://www.fullerton.edu/ — 200 — 34.8 KiB — 699 ms — http/1.1https://www.fullerton.edu/_resources/css/reset.css/_resources/css/reset.css https://www.fullerton.edu/_resources/css/reset.css — 200 — 1.2 KiB — 175 ms — http/1.1https://www.fullerton.edu/_resources/css/core2.css?v=1.1/_resources/css/core2.css?v=1.1 https://www.fullerton.edu/_resources/css/core2.css?v=1.1 — 200 — 8.8 KiB — 334 ms — http/1.1https://www.fullerton.edu/_resources/fonts/typefaces.css/_resources/fonts/typefaces.css https://www.fullerton.edu/_resources/fonts/typefaces.css — 200 — 1.4 KiB — 347 ms — http/1.1https://www.fullerton.edu/_resources/css/homepage-refresh.css?v=20260416035258/_resources/css/homepage-refresh.cs... https://www.fullerton.edu/_resources/css/homepage-refresh.css?v=20260416035258 — 200 — 12.3 KiB — 494 ms — http/1.1https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.csscdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css — 200 — 6.1 KiB — 92 ms — h3https://www.fullerton.edu/_resources/css/udm-style.css/_resources/css/udm-style.css https://www.fullerton.edu/_resources/css/udm-style.css — 200 — 2.3 KiB — 505 ms — http/1.1https://www.fullerton.edu/_resources/css/dropdown.css/_resources/css/dropdown.css https://www.fullerton.edu/_resources/css/dropdown.css — 200 — 999 B — 503 ms — http/1.1https://www.fullerton.edu/_resources/css/finditMobile.css?v=1.0/_resources/css/finditMobile.css?v=... https://www.fullerton.edu/_resources/css/finditMobile.css?v=1.0 — 200 — 1.3 KiB — 507 ms — http/1.1https://www.fullerton.edu/_resources/css/sitenav-test2.css/_resources/css/sitenav-test2.css https://www.fullerton.edu/_resources/css/sitenav-test2.css — 200 — 2.7 KiB — 517 ms — http/1.1https://www.fullerton.edu/_resources/css/search.css/_resources/css/search.css https://www.fullerton.edu/_resources/css/search.css — 200 — 2.2 KiB — 517 ms — http/1.1https://www.fullerton.edu/_resources/js/GoogleTagManager.js/_resources/js/GoogleTagManager.js https://www.fullerton.edu/_resources/js/GoogleTagManager.js — 200 — 844 B — 668 ms — http/1.1https://www.fullerton.edu/_resources/js/modernizr.custom.js/_resources/js/modernizr.custom.js https://www.fullerton.edu/_resources/js/modernizr.custom.js — 200 — 4.3 KiB — 674 ms — http/1.1https://www.fullerton.edu/_resources/js/jquery-3.6.0.min.js/_resources/js/jquery-3.6.0.min.js https://www.fullerton.edu/_resources/js/jquery-3.6.0.min.js — 200 — 32.6 KiB — 839 ms — http/1.1https://www.fullerton.edu/_resources/js/modernizr.js/_resources/js/modernizr.js https://www.fullerton.edu/_resources/js/modernizr.js — 200 — 6.4 KiB — 689 ms — http/1.1https://www.fullerton.edu/_resources/js/jquery.tabSlideOut.v1.3.js/_resources/js/jquery.tabSlideOut.v... https://www.fullerton.edu/_resources/js/jquery.tabSlideOut.v1.3.js — 200 — 1.9 KiB — 688 ms — http/1.1https://www.fullerton.edu/_resources/js/document.ready.js?v=1.1/_resources/js/document.ready.js?v=... https://www.fullerton.edu/_resources/js/document.ready.js?v=1.1 — 200 — 2.0 KiB — 818 ms — http/1.1https://www.fullerton.edu/_resources/js/mobile.js/_resources/js/mobile.js https://www.fullerton.edu/_resources/js/mobile.js — 200 — 792 B — 834 ms — http/1.1https://www.fullerton.edu/_resources/js/ajax_base.js?v=1.1/_resources/js/ajax_base.js?v=1.1 https://www.fullerton.edu/_resources/js/ajax_base.js?v=1.1 — 200 — 3.7 KiB — 846 ms — http/1.1https://www.fullerton.edu/_resources/js/page_features.js?v=1.11/_resources/js/page_features.js?v=1... https://www.fullerton.edu/_resources/js/page_features.js?v=1.11 — 200 — 3.9 KiB — 863 ms — http/1.1https://www.fullerton.edu/_resources/js/udm-custom.js/_resources/js/udm-custom.js https://www.fullerton.edu/_resources/js/udm-custom.js — 200 — 2.7 KiB — 863 ms — http/1.1https://www.fullerton.edu/_resources/js/udm-control.js/_resources/js/udm-control.js https://www.fullerton.edu/_resources/js/udm-control.js — 200 — 2.6 KiB — 981 ms — http/1.1https://www.fullerton.edu/_resources/js/udm-style.js/_resources/js/udm-style.js https://www.fullerton.edu/_resources/js/udm-style.js — 200 — 4.3 KiB — 1.0 s — http/1.1https://www.fullerton.edu/_resources/js/GoogleAnalytics.js/_resources/js/GoogleAnalytics.js https://www.fullerton.edu/_resources/js/GoogleAnalytics.js — 200 — 890 B — 1.0 s — http/1.1https://www.fullerton.edu/_resources/js/CrazyEgg.js/_resources/js/CrazyEgg.js https://www.fullerton.edu/_resources/js/CrazyEgg.js — 200 — 739 B — 1.0 s — http/1.1https://cdnjs.cloudflare.com/ajax/libs/bxslider/4.2.15/jquery.bxslider.min.jscdnjs.cloudflare.com/ajax/libs/bxsl... 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h2https://stats.g.doubleclick.net/g/collect?v=2&tid=G-F236HL21QV&cid=1507207197.1776891671&gtm=45je64k0v880402414z89179990689za20gzb9179990689zd9179990689&rcb=9&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938469~117266401~117384406~117512543~118128922~118463261stats.g.doubleclick.net/g/collect?v... https://stats.g.doubleclick.net/g/collect?v=2&tid=G-F236HL21QV&cid=1507207197.1776891671&gtm=45je64k0v880402414z89179990689za20gzb9179990689zd9179990689&rcb=9&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938469~117266401~117384406~117512543~118128922~118463261 — 204 — 551 B — 116 ms — h2https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-F236HL21QV&cid=1507207197.1776891671&gtm=45je64k0v880402414z89179990689za20gzb9179990689zd9179990689&rcb=9&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938469~117266401~117384406~117512543~118128922~118463261&z=281045923www.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-F236HL21QV&cid=1507207197.1776891671&gtm=45je64k0v880402414z89179990689za20gzb9179990689zd9179990689&rcb=9&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938469~117266401~117384406~117512543~118128922~118463261&z=281045923 — 200 — 408 B — 116 ms — h2https://www.google.com/ccm/collect?rcb=9&frm=0&en=page_view&dl=https%3A%2F%2Fwww.fullerton.edu%2F&scrsrc=www.googletagmanager.com&rnd=1552440106.1776891671&dt=Achieve%20Greatness%3A%20California%20State%20University%2C%20Fullerton&auid=680599510.1776891671&navt=n&npa=1&gtm=45je64k0v880402414z89179990689za20gzb9179990689zd9179990689xec&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115938466~115938469~117266401~117384406~117512543~118128922~118463261&apve=1&apvf=f&apvc=1&tids=AW-978065630&tid=AW-978065630&tft=1776891671426&tfd=2204www.google.com/ccm/collect?rcb=9&fr... https://www.google.com/ccm/collect?rcb=9&frm=0&en=page_view&dl=https%3A%2F%2Fwww.fullerton.edu%2F&scrsrc=www.googletagmanager.com&rnd=1552440106.1776891671&dt=Achieve%20Greatness%3A%20California%20State%20University%2C%20Fullerton&auid=680599510.1776891671&navt=n&npa=1&gtm=45je64k0v880402414z89179990689za20gzb9179990689zd9179990689xec&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115938466~115938469~117266401~117384406~117512543~118128922~118463261&apve=1&apvf=f&apvc=1&tids=AW-978065630&tid=AW-978065630&tft=1776891671426&tfd=2204 — 200 — 21 B — 71 ms — h3https://googleads.g.doubleclick.net/pagead/idgoogleads.g.doubleclick.net/pagead/... https://googleads.g.doubleclick.net/pagead/id — 302 — 23 B — 194 ms — h3https://static.doubleclick.net/instream/ad_status.jsstatic.doubleclick.net/instream/ad_... https://static.doubleclick.net/instream/ad_status.js — 200 — 494 B — 114 ms — h2https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.5f0apfZzpOA.2021.O/am=AAAABA/d=1/exm=base,root/ed=1/br=1/rs=AGKMywFg3MG1UeKh8ePjbhY_YEMv-NHjmA/m=r78Drbwww.youtube.com/s/_/ytembeds/_/js/k... https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.5f0apfZzpOA.2021.O/am=AAAABA/d=1/exm=base,root/ed=1/br=1/rs=AGKMywFg3MG1UeKh8ePjbhY_YEMv-NHjmA/m=r78Drb — 200 — 183.1 KiB — 96 ms — h3https://www.fullerton.edu/_resources/images/core/arrow-right-orange.png/_resources/images/core/arrow-right... https://www.fullerton.edu/_resources/images/core/arrow-right-orange.png — 200 — 1.3 KiB — 175 ms — http/1.1https://tracking.crazyegg.com/clock?u=479029&st=216947&t=1776891671334&tk=6b65ca1d43253a657f90197195337736tracking.crazyegg.com/clock?u=47902... https://tracking.crazyegg.com/clock?u=479029&st=216947&t=1776891671334&tk=6b65ca1d43253a657f90197195337736 — 200 — 147 B — 65 ms — h2https://www.fullerton.edu/_resources/images/Commencement-2026-Featured-Section.jpg/_resources/images/Commencement-202... https://www.fullerton.edu/_resources/images/Commencement-2026-Featured-Section.jpg — 200 — 283.4 KiB — 1.0 s — http/1.1blob:https://www.fullerton.edu/626c6e4b-bfe3-4297-84da-d3d50f2202cawww.fullerton.edu/626c6e4b-bfe3-429... blob:https://www.fullerton.edu/626c6e4b-bfe3-4297-84da-d3d50f2202ca — -1 — 0 B — 0 ms — https://www.fullerton.edu/_resources/images/misc/Explore-Athletics-2026.jpg/_resources/images/misc/Explore-Ath... https://www.fullerton.edu/_resources/images/misc/Explore-Athletics-2026.jpg — 200 — 270.4 KiB — 884 ms — http/1.1https://www.fullerton.edu/_resources/images/misc/Explore-Pollak-Library-2026.jpg/_resources/images/misc/Explore-Pol... https://www.fullerton.edu/_resources/images/misc/Explore-Pollak-Library-2026.jpg — 200 — 374.0 KiB — 1.2 s — http/1.1https://www.fullerton.edu/_resources/images/misc/Explore-Arboretum-2026.jpg/_resources/images/misc/Explore-Arb... https://www.fullerton.edu/_resources/images/misc/Explore-Arboretum-2026.jpg — 200 — 366.6 KiB — 1.0 s — http/1.1https://googleads.g.doubleclick.net/pagead/id?slf_rd=1googleads.g.doubleclick.net/pagead/... https://googleads.g.doubleclick.net/pagead/id?slf_rd=1 — 200 — 146 B — 31 ms — h3https://www.fullerton.edu/_resources/images/core/CalStateFullerton-reversed-orange.png/_resources/images/core/CalStateFul... https://www.fullerton.edu/_resources/images/core/CalStateFullerton-reversed-orange.png — 200 — 6.4 KiB — 174 ms — http/1.1https://i.ytimg.com/vi_webp/akrQScnd-Ys/sddefault.webpi.ytimg.com/vi_webp/akrQScnd-Ys/sdd... https://i.ytimg.com/vi_webp/akrQScnd-Ys/sddefault.webp — 200 — 57.8 KiB — 153 ms — h2https://www.fullerton.edu/_resources/images/meet-our-alumni/kirsten-vangsness.jpg/_resources/images/meet-our-alumni/... https://www.fullerton.edu/_resources/images/meet-our-alumni/kirsten-vangsness.jpg — 200 — 148.2 KiB — 685 ms — http/1.1https://www.google.com/js/th/qKGyavTtqsN8WEgkipKf66gOrjuRyzmwbl6TXabwSno.jswww.google.com/js/th/qKGyavTtqsN8WE... https://www.google.com/js/th/qKGyavTtqsN8WEgkipKf66gOrjuRyzmwbl6TXabwSno.js — 200 — 23.2 KiB — 72 ms — h3https://www.youtube.com/generate_204?9vbMQgwww.youtube.com/generate_204?9vbMQg https://www.youtube.com/generate_204?9vbMQg — 204 — 10 B — 29 ms — h3https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateITjnn-pa.googleapis.com/$rpc/google.i... https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT — 200 — 0 B — 107 ms — h2https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateITjnn-pa.googleapis.com/$rpc/google.i... https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT — 200 — 312 B — 37 ms — h2https://www.fullerton.edu/_resources/images/meet-our-alumni/joshua-gonzalez.jpg/_resources/images/meet-our-alumni/... https://www.fullerton.edu/_resources/images/meet-our-alumni/joshua-gonzalez.jpg — 200 — 97.0 KiB — 336 ms — http/1.1https://www.fullerton.edu/_resources/images/meet-our-alumni/christina-house.jpg/_resources/images/meet-our-alumni/... https://www.fullerton.edu/_resources/images/meet-our-alumni/christina-house.jpg — 200 — 78.1 KiB — 174 ms — http/1.1https://www.fullerton.edu/_resources/images/meet-our-alumni/omid-abtahi.jpg/_resources/images/meet-our-alumni/... https://www.fullerton.edu/_resources/images/meet-our-alumni/omid-abtahi.jpg — 200 — 68.7 KiB — 344 ms — http/1.1https://www.fullerton.edu/favicon.ico/favicon.ico https://www.fullerton.edu/favicon.ico — 200 — 1.7 KiB — 165 ms — http/1.1https://www.youtube.com/youtubei/v1/log_event?alt=jsonwww.youtube.com/youtubei/v1/log_eve... https://www.youtube.com/youtubei/v1/log_event?alt=json — 200 — 50 B — 33 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
58% of JavaScript execution is third-party
First-party Third-party 1322ms · 373KB · $23/mo
Unattributable
Other
Costly
Execution 460ms
Transfer 0 KB
Monthly Cost $8/mo
Google Tag Manager
Tag Manager
Costly
Execution 341ms
Transfer 176 KB
Unused 35%
Monthly Cost $6/mo
script.crazyegg.com
Other
Costly
Execution 307ms
Transfer 55 KB
Unused 53%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Optional
Execution 143ms
Transfer 121 KB
Unused 53%
Monthly Cost $2/mo
Google Analytics
Analytics
Optional
Execution 70ms
Transfer 21 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 460ms and costs ~$8/month
  • Google Tag Manager adds 341ms and costs ~$6/month
  • script.crazyegg.com adds 307ms and costs ~$5/month

58% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 460ms 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

Google Tag Manager takes 341ms 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

script.crazyegg.com takes 307ms 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

53% of script.crazyegg.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

53% of Google Tag Manager'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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