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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
38
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
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.

4.04 s

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

30.50 s

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

472 ms

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

0.193

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

9.72 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.

31.31 s

Page Load Progression

604 ms
1.2 s
1.8 s
2.4 s
3.0 s
3.6 s
4.2 s
4.8 s
Checks
17
8 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
14.1 MB transferred, 96 requests
FIX
14.1 MB transferred, 96 requests
Critical::
Page weighs 16.5 MB (14.1 MB transferred)
Warning::
Images are 9.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 9.3 MB
Warning::
JavaScript is 970 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 970 KB
Info::
Fonts are 378 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 378 KB
Info::
96 HTTP requests
Info::
Estimated 3.0 g CO2 per page load
14.1 MB / 2.4 MB budget
14.1 MB transferred
96 requests
3.0 g CO2 per page load
Images 9.3 MiB 66%
Other 3.4 MiB 24%
JavaScript 970.3 KiB 7%
Fonts 378.1 KiB 3%
CSS 53.8 KiB 0%
HTML 28.5 KiB 0%
Other 8.6 KiB 0%
Other 1.3 KiB 0%
Other 614 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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

D
Third-Party Impact
Action
66% third-party, 0 ms blocking
FIX
66% third-party, 0 ms blocking
Warning::
Third-party code accounts for 66% of page weight (9.4 MiB of 14.1 MiB)
Info::
Third-party blocking time is low (0 ms)
34%
66%
First-party Third-party
D
JS Execution Cost
Action
2368ms total JS execution
FIX
2368ms total JS execution
Warning::
https://tulane.edu/sites/default/files/js/js_4tQX1...: 608ms CPU time
Warning::
Unattributable: 517ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-W9Z...: 407ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-DQL0...: 302ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-LXRZ...: 217ms CPU time
Warning::
Third-party scripts: 1636ms (69% of total)

Main Thread Breakdown

Script Evaluation 52% Other 24% Script Parsing & Compilation 10% Style & Layout 9%
ScriptTotalScriptingParse/CompileParty
https://tulane.edu/sites/default/files/js/js_4tQX1qY8CISbXz-c62wz543U9va-TfMcnlvRK6JBpO4.js?scope=footer&delta=0&language=en&theme=tulane_tailwindcss&include=eJxtjUEKhDAQBD-UNU8KbRykdZyEnQnL_l7BgxdPBVWHAjNYVm0zNMkotbWdcuHoSliV_CaTB4IerJ6X7-jQ6TEphsKkBKg_2lLdM7TTZHtt9_zj8VfaegJa1Tm-608ms324ms79ms1st
Unattributable517ms13ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W9ZD83407ms334ms63ms3rd
https://www.googletagmanager.com/gtag/js?id=G-DQL0R37F2R&cx=c&gtm=4e64h1h1302ms247ms52ms3rd
https://www.googletagmanager.com/gtag/js?id=G-LXRZER7JKG&cx=c&gtm=4e64h1h1217ms174ms42ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js193ms171ms8ms3rd
https://tulane.edu/124ms6ms1ms1st
D
JS Bundles
Action
14 scripts, 366 KB unused
FIX
14 scripts, 366 KB unused
Warning::
https://tulane.edu/sites/default/files/js/js_4tQX1...: 163 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-DQL0...: 69 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-W9Z...: 68 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-LXRZ...: 66 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 366 KB
366 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://tulane.edu/sites/default/files/js/js_4tQX1qY8CISbXz-c62wz543U9va-TfMcnlvRK6JBpO4.js?scope=footer&delta=0&language=en&theme=tulane_tailwindcss&include=eJxtjUEKhDAQBD-UNU8KbRykdZyEnQnL_l7BgxdPBVWHAjNYVm0zNMkotbWdcuHoSliV_CaTB4IerJ6X7-jQ6TEphsKkBKg_2lLdM7TTZHtt9_zj8VfaegJa1Tm-244 KB163 KB (67%)✓1st
https://www.googletagmanager.com/gtag/js?id=G-DQL0R37F2R&cx=c&gtm=4e64h1h1172 KB69 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W9ZD83189 KB68 KB (36%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-LXRZER7JKG&cx=c&gtm=4e64h1h1153 KB66 KB (43%)✓3rd
https://snapwidget.com/js/embed.main.min.b26dca6d8591e5b3.js1 KB—✓3rd
https://snapwidget.com/js/embed.vendor.min.2f17f0b14ee46c5a.js1 KB—✓3rd
https://tulane.edu/sites/default/files/google_tag/tulane_universal_container/google_tag.script.js?tduwxb1 KB—✓1st
https://snapwidget.com/js/vendor/iframeResizer.contentWindow.min.0da4d54c7d115e53.js6 KB—✓3rd
https://www.googletagmanager.com/gtag/js?id=G-E8WQDE3S74156 KB—✓3rd
https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312451611 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

D
Page Weight Inventory
Action
96 resources · 14.1 MB · 366 KB savings available
FIX
96 resources · 14.1 MB · 366 KB savings available
Warning::
Page weight 13.1 MB over 1MB target
Got: 14.1 MB Expected: ≤ 1 MB
Info::
~366 KB of savings available
Warning::
38 third-party resources (66% of weight)
Info::
14 resources over 200KB
96 resources · 14.1 MiB · 38 third-party 13.1 MiB over 1MB target
Image 66% · 9.3 MiB
Media 24% · 3.4 MiB
JavaScript 7% · 970.3 KiB
Font 3% · 378.1 KiB
CSS 0% · 53.8 KiB
Document 0% · 28.7 KiB
Other 0% · 1.7 KiB

~365.6 KiB of savings available

Remove unused JavaScript: 365.6 KiB
C
Image Optimization
Action
21 images, 0 KB saveable
REVIEW
21 images, 0 KB saveable
Warning::
https://news.tulane.edu/sites/default/files/2026-0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.tulane.edu/sites/default/files/2026-0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://tulane.edu/sites/default/files/2022-08/shi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://tulane.edu/themes/custom/tulane_tailwindcs... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.tulane.edu/sites/default/files/2026-0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.tulane.edu/sites/default/files/2026-0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://tulane.edu/themes/custom/tulane_tailwindcs... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://tulane.edu/sites/default/files/2025-12/Con... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.tulane.edu/sites/default/files/2026-0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://tulane.edu/themes/custom/tulane_tailwindcs... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://tulane.edu/sites/default/files/2026-03/for... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
21 images 9.3 MB
0 oversized -0 KB
20 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

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
4 fonts (378 KB)
PASS
4 fonts (378 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

378 KB total

Render-blocking

0

of 4

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 28.0 s 30.0 s 32.0 s FCP 4.0 s LCP 30.5 shttps://use.typekit.net/af/442215/000000000000000000010b5a/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3l https://use.typekit.net/af/442215/000000000000000000010b5a/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 23.5 KiB — 56 ms — font-display: swaphttps://use.typekit.net/af/1709eb/000000000000000000010b60/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3l https://use.typekit.net/af/1709eb/000000000000000000010b60/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3 — 24.4 KiB — 53 ms — font-display: swaphttps://use.typekit.net/af/859a3b/00000000000000007735e58f/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3l https://use.typekit.net/af/859a3b/00000000000000007735e58f/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3 — 168.4 KiB — 62 ms — font-display: swaphttps://use.typekit.net/af/e792b0/00000000000000007735e58e/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3l https://use.typekit.net/af/e792b0/00000000000000007735e58e/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 161.8 KiB — 71 ms — font-display: swap
l woff2 swap
Size 23 KB
Load time 56 ms
Start 425 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 24 KB
Load time 53 ms
Start 427 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 168 KB
Load time 62 ms
Start 427 ms
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
l woff2 swap
Size 162 KB
Load time 71 ms
Start 427 ms
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
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 ~165 KB and ~330 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
A+
HTTP Caching
max-age=10800 (3 hours)
PASS
max-age=10800 (3 hours)
Info::
Cache-Control header is set
Got: max-age=10800, public
Info::
Effective TTL: 3 hours (max-age=10800)
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

max-age=10800, public

DirectiveValueMeaning
max-age10800Cache for 3 hours
public—Any cache may store this response
Effective TTL: 10800 seconds
Network Waterfall
96 requests over 2545ms
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 28.0 s 30.0 s 32.0 s FCP 4.0 s LCP 30.5 shttps://tulane.edu// https://tulane.edu/ — 200 — 20.7 KiB — 12 ms — h2https://tulane.edu/sites/default/files/google_tag/tulane_universal_container/google_tag.script.js?tduwxb/sites/default/files/google_tag/tul... https://tulane.edu/sites/default/files/google_tag/tulane_universal_container/google_tag.script.js?tduwxb — 200 — 577 B — 117 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/align.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/align.module.css?tduwxb — 200 — 478 B — 123 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/fieldgroup.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/fieldgroup.module.css?tduwxb — 200 — 339 B — 118 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/container-inline.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/container-inline.module.css?tduwxb — 200 — 359 B — 120 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/clearfix.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/clearfix.module.css?tduwxb — 200 — 433 B — 118 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/details.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/details.module.css?tduwxb — 200 — 338 B — 157 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/hidden.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/hidden.module.css?tduwxb — 200 — 942 B — 165 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/item-list.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/item-list.module.css?tduwxb — 200 — 412 B — 137 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/js.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/js.module.css?tduwxb — 200 — 472 B — 133 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/nowrap.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/nowrap.module.css?tduwxb — 200 — 330 B — 161 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/position-container.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/position-container.module.css?tduwxb — 200 — 332 B — 135 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/reset-appearance.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/reset-appearance.module.css?tduwxb — 200 — 416 B — 131 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/resize.module.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/resize.module.css?tduwxb — 200 — 372 B — 137 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/system-status-counter.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/system-status-counter.css?tduwxb — 200 — 589 B — 160 ms — h2https://tulane.edu/core/themes/stable9/css/system/components/system-status-report-counters.css?tduwxb/core/themes/stable9/css/system/com... https://tulane.edu/core/themes/stable9/css/system/components/system-status-report-counters.css?tduwxb — 200 — 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h3https://region1.google-analytics.com/g/collect?v=2&tid=G-DQL0R37F2R&gtm=45je64h1h1v884928980z872214967za20gzb72214967zd72214967&_p=1776818870335&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=198024647.1776818871&frm=0&pscdl=noapi&rcb=16&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616986~115938465~115938468~117266400~117512543&sid=1776818870&sct=1&seg=0&dl=https%3A%2F%2Ftulane.edu%2F&dt=Tulane%20University%3A%20Leading%20Research%20%26%20Education%20in%20New%20Orleans&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=855region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-DQL0R37F2R&gtm=45je64h1h1v884928980z872214967za20gzb72214967zd72214967&_p=1776818870335&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=198024647.1776818871&frm=0&pscdl=noapi&rcb=16&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616986~115938465~115938468~117266400~117512543&sid=1776818870&sct=1&seg=0&dl=https%3A%2F%2Ftulane.edu%2F&dt=Tulane%20University%3A%20Leading%20Research%20%26%20Education%20in%20New%20Orleans&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=855 — 204 — 545 B — 70 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-LXRZER7JKG&gtm=45je64h1h1v9132654401z872214967za20gzb72214967zd72214967&_p=1776818870335&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=198024647.1776818871&frm=0&pscdl=noapi&rcb=0&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401~117512543&sid=1776818870&sct=1&seg=0&dl=https%3A%2F%2Ftulane.edu%2F&dt=Tulane%20University%3A%20Leading%20Research%20%26%20Education%20in%20New%20Orleans&en=page_view&_fv=1&_ss=1&tfd=912region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-LXRZER7JKG&gtm=45je64h1h1v9132654401z872214967za20gzb72214967zd72214967&_p=1776818870335&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=198024647.1776818871&frm=0&pscdl=noapi&rcb=0&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401~117512543&sid=1776818870&sct=1&seg=0&dl=https%3A%2F%2Ftulane.edu%2F&dt=Tulane%20University%3A%20Leading%20Research%20%26%20Education%20in%20New%20Orleans&en=page_view&_fv=1&_ss=1&tfd=912 — 204 — 48 B — 27 ms — h2https://scripts.clarity.ms/0.8.59/clarity.jsscripts.clarity.ms/0.8.59/clarity.j... https://scripts.clarity.ms/0.8.59/clarity.js — 200 — 26.2 KiB — 129 ms — h2https://tulane.edu/sites/default/files/favicon.ico/sites/default/files/favicon.ico https://tulane.edu/sites/default/files/favicon.ico — 200 — 4.9 KiB — 4 ms — h2https://b.clarity.ms/collectb.clarity.ms/collect https://b.clarity.ms/collect — 200 — 376 B — 352 ms — http/1.1https://b.clarity.ms/collectb.clarity.ms/collect https://b.clarity.ms/collect — 204 — 274 B — 201 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
69% of JavaScript execution is third-party
First-party Third-party 1636ms · 541KB · €18/mo
Unattributable
Other
Costly
Execution 517ms
Transfer 0 KB
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 407ms
Transfer 189 KB
Unused 36%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 302ms
Transfer 172 KB
Unused 40%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 217ms
Transfer 153 KB
Unused 43%
Monthly Cost €2/mo
Microsoft Clarity
Session Replay
Optional
Execution 193ms
Transfer 26 KB
Monthly Cost €2/mo

These scripts may cost more than they're worth

  • Unattributable adds 517ms and costs ~€6/month
  • Google Tag Manager adds 407ms and costs ~€4/month
  • Google Tag Manager adds 302ms and costs ~€3/month
  • Google Tag Manager adds 217ms and costs ~€2/month

69% 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 517ms 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 407ms 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 302ms 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 217ms 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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