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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
3
PASS
7
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.
93
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
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.

5.25 s

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

15.18 s

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

1.04 s

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

0.000

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

5.81 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.

17.65 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
7 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
7.5 MB transferred, 76 requests
FIX
7.5 MB transferred, 76 requests
Critical::
Page weighs 9.3 MB (7.5 MB transferred)
Warning::
Images are 4.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.8 MB
Warning::
JavaScript is 748 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 748 KB
Info::
76 HTTP requests
Info::
Estimated 1.6 g CO2 per page load
7.5 MB / 2.4 MB budget
7.5 MB transferred
76 requests
1.6 g CO2 per page load
Images 4.8 MiB 64%
Other 1.5 MiB 20%
JavaScript 748.2 KiB 10%
HTML 179.2 KiB 2%
CSS 127.2 KiB 2%
Fonts 120.9 KiB 2%
Other 21.1 KiB 0%
Other 13.3 KiB 0%
Other 945 B 0%
Other 598 B 0%
Other 559 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

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (7.5 MiB of 7.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4527ms total JS execution
FIX
4527ms total JS execution
Warning::
https://www.brandeis.edu/_files/js/script.min.js: 1037ms CPU time
Warning::
https://www.brandeis.edu/: 935ms CPU time
Warning::
Unattributable: 717ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KB3...: 633ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-MFGT...: 466ms CPU time
Warning::
Third-party scripts: 4527ms (100% of total)

Main Thread Breakdown

Script Evaluation 43% Other 25% Style & Layout 20% Script Parsing & Compilation 8%
ScriptTotalScriptingParse/CompileParty
https://www.brandeis.edu/_files/js/script.min.js1037ms385ms18ms3rd
https://www.brandeis.edu/935ms18ms4ms3rd
Unattributable717ms16ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KB3L3M633ms519ms85ms3rd
https://www.googletagmanager.com/gtag/js?id=G-MFGTX36NQY&cx=c&gtm=4e64k0466ms384ms79ms3rd
https://www.googletagmanager.com/gtag/js?id=DC-14691538&cx=c&gtm=4e64k0353ms266ms85ms3rd
https://i071.brandeis.edu/script.js255ms209ms19ms3rd
https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js79ms60ms13ms3rd
https://brandeisu.blueconic.net/DG/DEFAULT/cs?&callback=bc_json109953ms45ms1ms3rd
D
Page Weight Inventory
Action
76 resources · 7.5 MB · 265 KB savings available
FIX
76 resources · 7.5 MB · 265 KB savings available
Warning::
Page weight 6.5 MB over 1MB target
Got: 7.5 MB Expected: ≤ 1 MB
Info::
~265 KB of savings available
Warning::
75 third-party resources (100% of weight)
Info::
13 resources over 200KB
76 resources · 7.5 MiB · 75 third-party 6.5 MiB over 1MB target
Image 64% · 4.8 MiB
Media 20% · 1.5 MiB
JavaScript 10% · 748.2 KiB
Document 2% · 179.6 KiB
CSS 2% · 127.2 KiB
Font 2% · 120.9 KiB
Other 0% · 23.5 KiB

~264.5 KiB of savings available

Remove unused JavaScript: 264.5 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
25 images, 0 KB saveable
REVIEW
25 images, 0 KB saveable
Warning::
https://www.brandeis.edu/images/vr-960.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.brandeis.edu/stories/2026/april/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.brandeis.edu/images/beautiful-place-br... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/28179327?s=4f59c70... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/27520431?s=6ad8efc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/27067900?s=0b1000b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/28322249?s=68879d6... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/28272923?s=d095956... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/27774582?s=460a2cd... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/27349586?s=180c6e1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.brandeis.edu/images/aerial-volen-1920.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.brandeis.edu/stories/2026/february/ima... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.brandeis.edu/stories/2026/march/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/26923237?s=8df0935... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/26527186?s=3bccbd2... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.brandeis.edu/stories/2026/april/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/27203318?s=8d77cc1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/26982790?s=1f27b00... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.juicer.io/api/media/26612569?s=4fee027... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
25 images 4.8 MB
0 oversized -0 KB
24 legacy format
19 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

C
JS Bundles
Action
25 scripts, 265 KB unused
REVIEW
25 scripts, 265 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KB3...: 70 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-MFGT...: 68 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=DC-146...: 60 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.brandeis.edu/_files/js/script.min.js: 46 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ajax.googleapis.com/ajax/libs/jquery/3.1.0...: 20 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 265 KB
265 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-KB3L3M176 KB70 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-MFGTX36NQY&cx=c&gtm=4e64k0170 KB68 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-14691538&cx=c&gtm=4e64k0130 KB60 KB (46%)✓3rd
https://www.brandeis.edu/_files/js/script.min.js97 KB46 KB (48%)✓3rd
https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js30 KB20 KB (69%)✓3rd
https://i071.brandeis.edu/script.js41 KB—✓3rd
https://cdnjs.cloudflare.com/polyfill/v3/polyfill.min.js?version=4.8.01 KB—✓3rd
https://www.brandeis.edu/_files/js/google.js1 KB—✓3rd
https://www.brandeis.edu/_files/js/hh-additions.js9 KB—✗3rd
https://cdnjs.cloudflare.com/ajax/libs/flickity/2.2.2/imagesloaded.pkgd.min.js0 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

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 (121 KB)
PASS
4 fonts (121 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

121 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 FCP 5.3 s LCP 15.2 shttps://fonts.gstatic.com/s/hind/v18/5aU19_a8oxmIfJpbERySjRhc9V0.woff25aU19_a8oxmIfJpbERySjRh... https://fonts.gstatic.com/s/hind/v18/5aU19_a8oxmIfJpbERySjRhc9V0.woff2 — 8.6 KiB — 21 ms — font-display: swaphttps://fonts.gstatic.com/s/hind/v18/5aU19_a8oxmIfLZcERySjRhc9V0.woff25aU19_a8oxmIfLZcERySjRh... https://fonts.gstatic.com/s/hind/v18/5aU19_a8oxmIfLZcERySjRhc9V0.woff2 — 8.5 KiB — 28 ms — font-display: swaphttps://fonts.gstatic.com/s/merriweather/v33/u-4e0qyriQwlOrhSvowK_l5UcA6zuSYEqOzpPe3HOZJ5eX1WtLaQwmYiSeqqJ-mXq1Gi.woff2u-4e0qyriQwlOrhSvowK_l5... https://fonts.gstatic.com/s/merriweather/v33/u-4e0qyriQwlOrhSvowK_l5UcA6zuSYEqOzpPe3HOZJ5eX1WtLaQwmYiSeqqJ-mXq1Gi.woff2 — 95.4 KiB — 51 ms — font-display: swaphttps://fonts.gstatic.com/s/hind/v18/5aU69_a8oxmIdGl4BDGwgDI.woff25aU69_a8oxmIdGl4BDGwgDI... https://fonts.gstatic.com/s/hind/v18/5aU69_a8oxmIdGl4BDGwgDI.woff2 — 8.5 KiB — 50 ms — font-display: swap
5aU19_a8oxmIfJpbERySjRh... woff2 swap
Size 9 KB
Load time 21 ms
Start 839 ms
Risk FOUT — text flashes from fallback to web font
5aU19_a8oxmIfLZcERySjRh... woff2 swap
Size 9 KB
Load time 28 ms
Start 840 ms
Risk FOUT — text flashes from fallback to web font
u-4e0qyriQwlOrhSvowK_l5... woff2 swap
Size 95 KB
Load time 51 ms
Start 840 ms
Risk FOUT — text flashes from fallback to web font
5aU69_a8oxmIdGl4BDGwgDI... woff2 swap
Size 8 KB
Load time 50 ms
Start 840 ms
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)
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
76 requests over 2819ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s FCP 5.3 s LCP 15.2 shttps://brandeis.edu// https://brandeis.edu/ — 302 — 430 B — 253 ms — h2https://www.brandeis.edu/www.brandeis.edu/ https://www.brandeis.edu/ — 200 — 179.2 KiB — 371 ms — h2https://fonts.googleapis.com/css?family=Merriweather:400,300,700fonts.googleapis.com/css?family=Mer... https://fonts.googleapis.com/css?family=Merriweather:400,300,700 — 200 — 1.1 KiB — 26 ms — h2https://fonts.googleapis.com/css?family=Hind:300,400,500,600,700fonts.googleapis.com/css?family=Hin... https://fonts.googleapis.com/css?family=Hind:300,400,500,600,700 — 200 — 663 B — 28 ms — h2https://www.brandeis.edu/_files/css/style.csswww.brandeis.edu/_files/css/style.c... https://www.brandeis.edu/_files/css/style.css — 200 — 75.9 KiB — 143 ms — h2https://www.brandeis.edu/_files/css/custom-style.csswww.brandeis.edu/_files/css/custom-... https://www.brandeis.edu/_files/css/custom-style.css — 200 — 33.9 KiB — 130 ms — h2https://www.brandeis.edu/_files/css/custom-style-hh.csswww.brandeis.edu/_files/css/custom-... https://www.brandeis.edu/_files/css/custom-style-hh.css — 200 — 8.7 KiB — 102 ms — h2https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.jsajax.googleapis.com/ajax/libs/jquer... https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js — 200 — 30.1 KiB — 19 ms — h2https://www.brandeis.edu/_files/js/calendar.jswww.brandeis.edu/_files/js/calendar... https://www.brandeis.edu/_files/js/calendar.js — 200 — 3.7 KiB — 121 ms — h2https://www.brandeis.edu/_files/js/rssFeed.jswww.brandeis.edu/_files/js/rssFeed.... https://www.brandeis.edu/_files/js/rssFeed.js — 200 — 11.2 KiB — 124 ms — h2https://www.brandeis.edu/_files/favicons/manifest.jsonwww.brandeis.edu/_files/favicons/ma... https://www.brandeis.edu/_files/favicons/manifest.json — 200 — 598 B — 276 ms — h2https://www.brandeis.edu/images/aerial-volen-1920.jpgwww.brandeis.edu/images/aerial-vole... https://www.brandeis.edu/images/aerial-volen-1920.jpg — 200 — 360.3 KiB — 164 ms — h2https://cdnjs.cloudflare.com/ajax/libs/flickity/2.2.2/imagesloaded.pkgd.min.jscdnjs.cloudflare.com/ajax/libs/flic... https://cdnjs.cloudflare.com/ajax/libs/flickity/2.2.2/imagesloaded.pkgd.min.js — -1 — 0 B — 221 ms — https://www.brandeis.edu/images/vr-960.jpgwww.brandeis.edu/images/vr-960.jpg https://www.brandeis.edu/images/vr-960.jpg — 200 — 73.3 KiB — 197 ms — h2https://www.brandeis.edu/stories/2026/february/images/guay-hannah.jpgwww.brandeis.edu/stories/2026/febru... https://www.brandeis.edu/stories/2026/february/images/guay-hannah.jpg — 200 — 164.1 KiB — 262 ms — h2https://www.brandeis.edu/stories/2026/march/images/hiatt-photo.jpgwww.brandeis.edu/stories/2026/march... https://www.brandeis.edu/stories/2026/march/images/hiatt-photo.jpg — 200 — 84.8 KiB — 256 ms — h2https://www.brandeis.edu/stories/2026/april/images/second-transcript.jpgwww.brandeis.edu/stories/2026/april... 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h2https://px.mountain.com/st?ga_tracking_id=G-FYLW1X10CH%3BG-MFGTX36NQY&ga_client_id=591535785.1776893495&shpt=Brandeis%20University&dcm_cid=591535785.1776893495&available_ga=%5B%7B%22id%22%3A%22G-MFGTX36NQY%22%2C%22sess_id%22%3A%221776893495%22%7D%5D&ga_info=%7B%22status%22%3A%22OK%22%2C%22available_ga%22%3A%5B%7B%22id%22%3A%22G-MFGTX36NQY%22%2C%22sess_id%22%3A%221776893495%22%7D%5D%2C%22hardcoded_ga%22%3A%22G-FYLW1X10CH%3BG-MFGTX36NQY%22%2C%22ga_tracking_id%22%3A%22G-FYLW1X10CH%3BG-MFGTX36NQY%22%2C%22ga_client_id%22%3A%22591535785.1776893495%22%2C%22shpt%22%3A%22Brandeis%20University%22%2C%22dcm_cid%22%3A%22591535785.1776893495%22%2C%22mntnis%22%3A%22DO%2BEw%2FY52S6zIJCs3EW7YgICLBBetjPU%22%2C%22execution_workflow%22%3A%7B%22iteration%22%3A3%2C%22getClientIdByCookie%22%3A%22OK%22%2C%22shpt%22%3A%22OK%22%2C%22dcm_cid%22%3A%22OK%22%7D%7D&hardcoded_ga=G-FYLW1X10CH%3BG-MFGTX36NQY&meta_tag_data=%5B%7B%22description.content%22%3A%22Explore%20Brandeis%20University%2C%20a%20top-ranked%20liberal%20arts%20and%20research%20college%20near%20Boston.%20Learn%20about%20majors%20and%20programs%2C%20admissions%20and%20campus%20life.%22%7D%5D&dxver=4.0.0&shaid=44809&plh=https%3A%2F%2Fwww.brandeis.edu%2F&shadditional=googletagmanager%3Dtrue%2Cga4%3Dtrue&hc_ga_tr_id=G-FYLW1X10CH%3BG-MFGTX36NQY&shoid=591535785.1776893495&cb=1776893495814489&shguid=ae51a2fd-d207-33d6-91af-36b3543d4f21&shgts=1776893495941px.mountain.com/st?ga_tracking_id=G... https://px.mountain.com/st?ga_tracking_id=G-FYLW1X10CH%3BG-MFGTX36NQY&ga_client_id=591535785.1776893495&shpt=Brandeis%20University&dcm_cid=591535785.1776893495&available_ga=%5B%7B%22id%22%3A%22G-MFGTX36NQY%22%2C%22sess_id%22%3A%221776893495%22%7D%5D&ga_info=%7B%22status%22%3A%22OK%22%2C%22available_ga%22%3A%5B%7B%22id%22%3A%22G-MFGTX36NQY%22%2C%22sess_id%22%3A%221776893495%22%7D%5D%2C%22hardcoded_ga%22%3A%22G-FYLW1X10CH%3BG-MFGTX36NQY%22%2C%22ga_tracking_id%22%3A%22G-FYLW1X10CH%3BG-MFGTX36NQY%22%2C%22ga_client_id%22%3A%22591535785.1776893495%22%2C%22shpt%22%3A%22Brandeis%20University%22%2C%22dcm_cid%22%3A%22591535785.1776893495%22%2C%22mntnis%22%3A%22DO%2BEw%2FY52S6zIJCs3EW7YgICLBBetjPU%22%2C%22execution_workflow%22%3A%7B%22iteration%22%3A3%2C%22getClientIdByCookie%22%3A%22OK%22%2C%22shpt%22%3A%22OK%22%2C%22dcm_cid%22%3A%22OK%22%7D%7D&hardcoded_ga=G-FYLW1X10CH%3BG-MFGTX36NQY&meta_tag_data=%5B%7B%22description.content%22%3A%22Explore%20Brandeis%20University%2C%20a%20top-ranked%20liberal%20arts%20and%20research%20college%20near%20Boston.%20Learn%20about%20majors%20and%20programs%2C%20admissions%20and%20campus%20life.%22%7D%5D&dxver=4.0.0&shaid=44809&plh=https%3A%2F%2Fwww.brandeis.edu%2F&shadditional=googletagmanager%3Dtrue%2Cga4%3Dtrue&hc_ga_tr_id=G-FYLW1X10CH%3BG-MFGTX36NQY&shoid=591535785.1776893495&cb=1776893495814489&shguid=ae51a2fd-d207-33d6-91af-36b3543d4f21&shgts=1776893495941 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 4527ms · 823KB · €49/mo
www.brandeis.edu
Other
Costly
Execution 1037ms
Transfer 97 KB
Unused 48%
Monthly Cost €11/mo
www.brandeis.edu
Other
Costly
Execution 935ms
Transfer 179 KB
Monthly Cost €10/mo
Unattributable
Other
Costly
Execution 717ms
Transfer 0 KB
Monthly Cost €8/mo
Google Tag Manager
Tag Manager
Costly
Execution 633ms
Transfer 176 KB
Unused 40%
Monthly Cost €7/mo
Google Tag Manager
Tag Manager
Costly
Execution 466ms
Transfer 170 KB
Unused 40%
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 353ms
Transfer 130 KB
Unused 46%
Monthly Cost €4/mo
i071.brandeis.edu
Other
Costly
Execution 255ms
Transfer 41 KB
Monthly Cost €3/mo
ajax.googleapis.com
Other
Optional
Execution 79ms
Transfer 30 KB
Unused 69%
Monthly Cost €1/mo
brandeisu.blueconic.net
Other
Optional
Execution 53ms
Transfer 1 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.brandeis.edu adds 1037ms and costs ~€11/month
  • www.brandeis.edu adds 935ms and costs ~€10/month
  • Unattributable adds 717ms and costs ~€8/month
  • Google Tag Manager adds 633ms and costs ~€7/month
  • Google Tag Manager adds 466ms and costs ~€5/month
  • Google Tag Manager adds 353ms and costs ~€4/month
  • i071.brandeis.edu adds 255ms and costs ~€3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.brandeis.edu takes 1037ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.brandeis.edu takes 935ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 717ms 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 633ms 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 466ms 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 353ms 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

i071.brandeis.edu takes 255ms 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

69% of ajax.googleapis.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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