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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
2
REVIEW
5
PASS
6
INFO
2

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

Mobile Desktop
63
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.
85
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

1.46 s

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

1.96 s

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

21 ms

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

0.580

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

1.46 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.

2.84 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 5 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (2.0 MiB of 2.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
41 resources · 2.0 MB · 162 KB savings available
FIX
41 resources · 2.0 MB · 162 KB savings available
Warning::
Page weight 1008 KB over 1MB target
Got: 2.0 MB Expected: ≤ 1 MB
Info::
~162 KB of savings available
Warning::
40 third-party resources (100% of weight)
Info::
2 resources over 200KB
41 resources · 2.0 MiB · 40 third-party 1008.1 KiB over 1MB target
Font 50% · 1023.8 KiB
JavaScript 20% · 406.3 KiB
Image 20% · 405.2 KiB
CSS 9% · 182.5 KiB
Document 0% · 10.1 KiB
Other 0% · 4.3 KiB

~161.5 KiB of savings available

Remove unused JavaScript: 161.5 KiB
C
Page Weight Budget
Action
2.0 MB transferred, 41 requests
REVIEW
2.0 MB transferred, 41 requests
Info::
Page weighs 3.4 MB (2.0 MB transferred)
Info::
Fonts are 1024 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 1024 KB
Info::
41 HTTP requests
Info::
Estimated 0.42 g CO2 per page load
2.0 MB / 2.4 MB budget
2.0 MB transferred
41 requests
0.42 g CO2 per page load
Fonts 1023.8 KiB 50%
JavaScript 406.3 KiB 20%
Images 404.2 KiB 20%
CSS 182.5 KiB 9%
HTML 9.5 KiB 0%
Other 2.8 KiB 0%
Other 1.3 KiB 0%
Other 761 B 0%
Other 547 B 0%
Other 547 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

C
Image Optimization
Action
7 images, 0 KB saveable
REVIEW
7 images, 0 KB saveable
Warning::
https://www.rpi.edu/themes/custom/rpi/img/RPI_Logo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.rpi.edu/sites/default/files/styles/si... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.rpi.edu/sites/default/files/styles/21x... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.rpi.edu/sites/default/files/styles/si... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://news.rpi.edu/sites/default/files/styles/si... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
7 images 404 KB
0 oversized -0 KB
5 legacy format
5 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

B
JS Execution Cost
517ms total JS execution
REVIEW
517ms total JS execution
Info::
https://www.rpi.edu/: 133ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-TTXB...: 95ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-WDD...: 79ms CPU time
Info::
Unattributable: 79ms CPU time
Info::
https://rensselaer-polytechnic-institute.contact-s...: 69ms CPU time
Warning::
Third-party scripts: 517ms (100% of total)

Main Thread Breakdown

Script Evaluation 47% Other 24% Style & Layout 15% Script Parsing & Compilation 8% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.rpi.edu/133ms2ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-TTXBMVKEJW&cx=c&gtm=4e64h195ms79ms15ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WDDXF25779ms64ms13ms3rd
Unattributable79ms2ms0ms3rd
https://rensselaer-polytechnic-institute.contact-server.com/mtc.js69ms47ms0ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js62ms53ms3ms3rd
C
JS Bundles
Action
13 scripts, 162 KB unused
REVIEW
13 scripts, 162 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-TTXB...: 68 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WDD...: 60 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.rpi.edu/sites/default/files/js/js_eSuy...: 34 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 162 KB
162 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-TTXBMVKEJW&cx=c&gtm=4e64h1169 KB68 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WDDXF257127 KB60 KB (47%)✓3rd
https://www.rpi.edu/sites/default/files/js/js_eSuyrTxcfusFaXjeggWsR2y0YuNdX4BfMpfK7YKizCI.js?scope=footer&delta=1&language=en&theme=rpi&include=eJxLz89Pz0mNL0lM108HEjrpqHy9xKzEClTBXJ2igkz9pPz8kuKSosQCMC89Jz8pMUe3uKQyJzMvHQBaliBg42 KB34 KB (80%)✓3rd
https://alert.rpi.edu/alerts.js?_=17768109030710 KB—✓3rd
https://www.rpi.edu/core/assets/vendor/jquery/jquery.min.js?v=4.0.032 KB—✓3rd
https://www.rpi.edu/modules/contrib/google_tag/js/gtm.js?tduvt51 KB—✓3rd
https://www.rpi.edu/sites/default/files/js/js_DNi57yiLLaas9DLermymPAhNQkAm8dw7Wh_LjN8WlrA.js?scope=header&delta=0&language=en&theme=rpi&include=eJxLz89Pz0mNL0lM108HEjrpqHy9xKzEClTBXJ2igkz9pPz8kuKSosQCMC89Jz8pMUe3uKQyJzMvHQBaliBg0 KB—✓3rd
https://www.clarity.ms/tag/rxfz2i6zpq?ref=gtm1 KB—✓3rd
https://www.rpi.edu/modules/contrib/google_tag/js/gtag.js?tduvt51 KB—✓3rd
https://adp.eab.com/js/adp.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

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
7 fonts (1024 KB)
PASS
7 fonts (1024 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

1024 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.5 s LCP 2.0 shttps://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Medium.woff2RPIGeist-Medium.woff2 https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Medium.woff2 — 31.3 KiB — 21 ms — font-display: swaphttps://www.rpi.edu/themes/custom/rpi/fonts/RPIGeistMono-Regular.woff2RPIGeistMono-Regular.woff2 https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeistMono-Regular.woff2 — 28.0 KiB — 21 ms — font-display: swaphttps://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-solid-900.woff2 — 340.3 KiB — 34 ms — font-display: swaphttps://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Regular.woff2RPIGeist-Regular.woff2 https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Regular.woff2 — 29.7 KiB — 23 ms — font-display: swaphttps://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Bold.woff2RPIGeist-Bold.woff2 https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Bold.woff2 — 31.0 KiB — 25 ms — font-display: swaphttps://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-light-300.woff2fa-light-300.woff2 https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-light-300.woff2 — 447.8 KiB — 56 ms — font-display: swaphttps://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-brands-400.woff2 — 115.7 KiB — 46 ms — font-display: swap
RPIGeist-Medium.woff2 woff2 swap
Size 31 KB
Load time 21 ms
Start 226 ms
Risk FOUT — text flashes from fallback to web font
RPIGeistMono-Regular.woff2 woff2 swap
Size 28 KB
Load time 21 ms
Start 227 ms
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 340 KB
Load time 34 ms
Start 227 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
RPIGeist-Regular.woff2 woff2 swap
Size 30 KB
Load time 23 ms
Start 227 ms
Risk FOUT — text flashes from fallback to web font
RPIGeist-Bold.woff2 woff2 swap
Size 31 KB
Load time 25 ms
Start 227 ms
Risk FOUT — text flashes from fallback to web font
fa-light-300.woff2 woff2 swap
Size 448 KB
Load time 56 ms
Start 228 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
fa-brands-400.woff2 woff2 swap
Size 116 KB
Load time 46 ms
Start 235 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 ~452 KB and ~904 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
HTTP Caching
max-age=86400 (1 day)
PASS
max-age=86400 (1 day)
Info::
Cache-Control header is set
Got: public, max-age=86400
Info::
Effective TTL: 1 day (max-age=86400)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=86400

DirectiveValueMeaning
public—Any cache may store this response
max-age86400Cache for 1 day
Effective TTL: 86400 seconds
Network Waterfall
41 requests over 2129ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.5 s LCP 2.0 shttps://rpi.edu// https://rpi.edu/ — 301 — 555 B — 28 ms — h2https://www.rpi.edu/www.rpi.edu/ https://www.rpi.edu/ — 200 — 9.5 KiB — 25 ms — h2https://www.rpi.edu/sites/default/files/css/css_kNOsph91cPV2f0dHWrZJtca0iCHYR-Je_9gK7rG-FII.css?delta=0&language=en&theme=rpi&include=eJxFiUsSgCAIQC9keiZMUmdIGMCFnb7GTbv3OVkxDdYbqD8YBBSqgjRLRacAxb_EOWRm6tawBJWeMrObf2_bxcNtUyXOQIf5oj5qsGWOd8pg-AJh7Csbwww.rpi.edu/sites/default/files/css... https://www.rpi.edu/sites/default/files/css/css_kNOsph91cPV2f0dHWrZJtca0iCHYR-Je_9gK7rG-FII.css?delta=0&language=en&theme=rpi&include=eJxFiUsSgCAIQC9keiZMUmdIGMCFnb7GTbv3OVkxDdYbqD8YBBSqgjRLRacAxb_EOWRm6tawBJWeMrObf2_bxcNtUyXOQIf5oj5qsGWOd8pg-AJh7Csb — 200 — 1.5 KiB — 15 ms — h2https://www.rpi.edu/sites/default/files/css/css_wvLZFgldgWnuC_1vR5Z621LoI5Un9LDL-6laGbk09s4.css?delta=1&language=en&theme=rpi&include=eJxFiUsSgCAIQC9keiZMUmdIGMCFnb7GTbv3OVkxDdYbqD8YBBSqgjRLRacAxb_EOWRm6tawBJWeMrObf2_bxcNtUyXOQIf5oj5qsGWOd8pg-AJh7Csbwww.rpi.edu/sites/default/files/css... https://www.rpi.edu/sites/default/files/css/css_wvLZFgldgWnuC_1vR5Z621LoI5Un9LDL-6laGbk09s4.css?delta=1&language=en&theme=rpi&include=eJxFiUsSgCAIQC9keiZMUmdIGMCFnb7GTbv3OVkxDdYbqD8YBBSqgjRLRacAxb_EOWRm6tawBJWeMrObf2_bxcNtUyXOQIf5oj5qsGWOd8pg-AJh7Csb — 200 — 181.0 KiB — 37 ms — h2https://www.rpi.edu/sites/default/files/js/js_DNi57yiLLaas9DLermymPAhNQkAm8dw7Wh_LjN8WlrA.js?scope=header&delta=0&language=en&theme=rpi&include=eJxLz89Pz0mNL0lM108HEjrpqHy9xKzEClTBXJ2igkz9pPz8kuKSosQCMC89Jz8pMUe3uKQyJzMvHQBaliBgwww.rpi.edu/sites/default/files/js/... https://www.rpi.edu/sites/default/files/js/js_DNi57yiLLaas9DLermymPAhNQkAm8dw7Wh_LjN8WlrA.js?scope=header&delta=0&language=en&theme=rpi&include=eJxLz89Pz0mNL0lM108HEjrpqHy9xKzEClTBXJ2igkz9pPz8kuKSosQCMC89Jz8pMUe3uKQyJzMvHQBaliBg — 200 — 480 B — 32 ms — h2https://www.rpi.edu/modules/contrib/google_tag/js/gtag.js?tduvt5www.rpi.edu/modules/contrib/google_... https://www.rpi.edu/modules/contrib/google_tag/js/gtag.js?tduvt5 — 200 — 1.1 KiB — 20 ms — h2https://www.rpi.edu/modules/contrib/google_tag/js/gtm.js?tduvt5www.rpi.edu/modules/contrib/google_... https://www.rpi.edu/modules/contrib/google_tag/js/gtm.js?tduvt5 — 200 — 876 B — 15 ms — h2https://www.rpi.edu/themes/custom/rpi/img/RPI_Logo_White.svgwww.rpi.edu/themes/custom/rpi/img/R... https://www.rpi.edu/themes/custom/rpi/img/RPI_Logo_White.svg — 200 — 1.1 KiB — 17 ms — h2https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-04/STARMAN_Gentry%20Lee%20on%20Mars%201%20%282%29.png?itok=OUFrjdHynews.rpi.edu/sites/default/files/st... https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-04/STARMAN_Gentry%20Lee%20on%20Mars%201%20%282%29.png?itok=OUFrjdHy — 200 — 117.0 KiB — 99 ms — h2https://www.rpi.edu/sites/default/files/styles/21x9_full_screen/public/2026-04/art002e013356~large.jpg?itok=PzAqlKaCwww.rpi.edu/sites/default/files/sty... https://www.rpi.edu/sites/default/files/styles/21x9_full_screen/public/2026-04/art002e013356~large.jpg?itok=PzAqlKaC — 200 — 179.3 KiB — 17 ms — h2https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-03/control_room.jpg?itok=CM30NCejnews.rpi.edu/sites/default/files/st... https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-03/control_room.jpg?itok=CM30NCej — 200 — 21.9 KiB — 47 ms — h2https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-04/20260401_221111857_iOS.jpg?itok=cTWBg78gnews.rpi.edu/sites/default/files/st... https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-04/20260401_221111857_iOS.jpg?itok=cTWBg78g — 200 — 10.5 KiB — 46 ms — h2https://www.rpi.edu/core/assets/vendor/jquery/jquery.min.js?v=4.0.0www.rpi.edu/core/assets/vendor/jque... https://www.rpi.edu/core/assets/vendor/jquery/jquery.min.js?v=4.0.0 — 200 — 31.7 KiB — 15 ms — h2https://www.rpi.edu/sites/default/files/js/js_eSuyrTxcfusFaXjeggWsR2y0YuNdX4BfMpfK7YKizCI.js?scope=footer&delta=1&language=en&theme=rpi&include=eJxLz89Pz0mNL0lM108HEjrpqHy9xKzEClTBXJ2igkz9pPz8kuKSosQCMC89Jz8pMUe3uKQyJzMvHQBaliBgwww.rpi.edu/sites/default/files/js/... https://www.rpi.edu/sites/default/files/js/js_eSuyrTxcfusFaXjeggWsR2y0YuNdX4BfMpfK7YKizCI.js?scope=footer&delta=1&language=en&theme=rpi&include=eJxLz89Pz0mNL0lM108HEjrpqHy9xKzEClTBXJ2igkz9pPz8kuKSosQCMC89Jz8pMUe3uKQyJzMvHQBaliBg — 200 — 42.3 KiB — 16 ms — h2https://www.rpi.edu/themes/custom/rpi/img/favicons/site.webmanifestwww.rpi.edu/themes/custom/rpi/img/f... https://www.rpi.edu/themes/custom/rpi/img/favicons/site.webmanifest — 200 — 761 B — 20 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-WDDXF257www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-WDDXF257 — 200 — 127.1 KiB — 96 ms — h2https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Medium.woff2www.rpi.edu/themes/custom/rpi/fonts... https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Medium.woff2 — 200 — 31.3 KiB — 21 ms — h2https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeistMono-Regular.woff2www.rpi.edu/themes/custom/rpi/fonts... https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeistMono-Regular.woff2 — 200 — 28.0 KiB — 21 ms — h2https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-solid-900.woff2www.rpi.edu/sites/all/libraries/fon... https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-solid-900.woff2 — 200 — 340.3 KiB — 34 ms — h2https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Regular.woff2www.rpi.edu/themes/custom/rpi/fonts... https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Regular.woff2 — 200 — 29.7 KiB — 23 ms — h2https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Bold.woff2www.rpi.edu/themes/custom/rpi/fonts... https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Bold.woff2 — 200 — 31.0 KiB — 25 ms — h2https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-light-300.woff2www.rpi.edu/sites/all/libraries/fon... https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-light-300.woff2 — 200 — 447.8 KiB — 56 ms — h2https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-brands-400.woff2www.rpi.edu/sites/all/libraries/fon... https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-brands-400.woff2 — 200 — 115.7 KiB — 46 ms — h2https://alert.rpi.edu/alerts.js?_=1776810903071alert.rpi.edu/alerts.js?_=177681090... https://alert.rpi.edu/alerts.js?_=1776810903071 — 200 — 491 B — 399 ms — http/1.1https://www.rpi.edu/sites/default/files/styles/4x3_large/public/2026-03/54437082108-2560caf6d2-o-cropped.jpg?itok=t1tHvw9Pwww.rpi.edu/sites/default/files/sty... https://www.rpi.edu/sites/default/files/styles/4x3_large/public/2026-03/54437082108-2560caf6d2-o-cropped.jpg?itok=t1tHvw9P — 200 — 73.9 KiB — 11 ms — h2https://www.clarity.ms/tag/rxfz2i6zpq?ref=gtmwww.clarity.ms/tag/rxfz2i6zpq?ref=g... https://www.clarity.ms/tag/rxfz2i6zpq?ref=gtm — 200 — 1.1 KiB — 223 ms — http/1.1https://www.googletagmanager.com/gtag/js?id=G-TTXBMVKEJW&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... 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https://analytics.google.com/g/collect?v=2&tid=G-TTXBMVKEJW&gtm=45je64h1v892353664z89172557041za20gzb9172557041zd9172557041&_p=1776810902969&_gaz=1&gcd=13l3l3l3l1l1&npa=0&dma=0&_eu=AAAAAGA&are=1&cid=450620686.1776810903&frm=0&pscdl=noapi&rcb=12&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115616986~115938466~115938469~117266400&sid=1776810903&sct=1&seg=0&dl=https%3A%2F%2Fwww.rpi.edu%2F&dt=Rensselaer%20Polytechnic%20Institute%20(RPI)%20%3A%3A%20Architecture%2C%20Business%2C%20Engineering%2C%20Humanities%2C%20IT%20%26%20Web%20Science%2C%20Science&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=569 — 204 — 547 B — 49 ms — 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0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.5 s LCP 2.0 shttps://rpi.edu// https://rpi.edu/ — 301 — 555 B — 28 ms — h2https://www.rpi.edu/www.rpi.edu/ https://www.rpi.edu/ — 200 — 9.5 KiB — 25 ms — h2https://www.rpi.edu/sites/default/files/css/css_kNOsph91cPV2f0dHWrZJtca0iCHYR-Je_9gK7rG-FII.css?delta=0&language=en&theme=rpi&include=eJxFiUsSgCAIQC9keiZMUmdIGMCFnb7GTbv3OVkxDdYbqD8YBBSqgjRLRacAxb_EOWRm6tawBJWeMrObf2_bxcNtUyXOQIf5oj5qsGWOd8pg-AJh7Csbwww.rpi.edu/sites/default/files/css... https://www.rpi.edu/sites/default/files/css/css_kNOsph91cPV2f0dHWrZJtca0iCHYR-Je_9gK7rG-FII.css?delta=0&language=en&theme=rpi&include=eJxFiUsSgCAIQC9keiZMUmdIGMCFnb7GTbv3OVkxDdYbqD8YBBSqgjRLRacAxb_EOWRm6tawBJWeMrObf2_bxcNtUyXOQIf5oj5qsGWOd8pg-AJh7Csb — 200 — 1.5 KiB — 15 ms — 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h2https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-04/STARMAN_Gentry%20Lee%20on%20Mars%201%20%282%29.png?itok=OUFrjdHynews.rpi.edu/sites/default/files/st... https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-04/STARMAN_Gentry%20Lee%20on%20Mars%201%20%282%29.png?itok=OUFrjdHy — 200 — 117.0 KiB — 99 ms — h2https://www.rpi.edu/sites/default/files/styles/21x9_full_screen/public/2026-04/art002e013356~large.jpg?itok=PzAqlKaCwww.rpi.edu/sites/default/files/sty... https://www.rpi.edu/sites/default/files/styles/21x9_full_screen/public/2026-04/art002e013356~large.jpg?itok=PzAqlKaC — 200 — 179.3 KiB — 17 ms — h2https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-03/control_room.jpg?itok=CM30NCejnews.rpi.edu/sites/default/files/st... https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-03/control_room.jpg?itok=CM30NCej — 200 — 21.9 KiB — 47 ms — h2https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-04/20260401_221111857_iOS.jpg?itok=cTWBg78gnews.rpi.edu/sites/default/files/st... https://news.rpi.edu/sites/default/files/styles/sixteen_by_nine_small/public/2026-04/20260401_221111857_iOS.jpg?itok=cTWBg78g — 200 — 10.5 KiB — 46 ms — h2https://www.rpi.edu/core/assets/vendor/jquery/jquery.min.js?v=4.0.0www.rpi.edu/core/assets/vendor/jque... https://www.rpi.edu/core/assets/vendor/jquery/jquery.min.js?v=4.0.0 — 200 — 31.7 KiB — 15 ms — h2https://www.rpi.edu/sites/default/files/js/js_eSuyrTxcfusFaXjeggWsR2y0YuNdX4BfMpfK7YKizCI.js?scope=footer&delta=1&language=en&theme=rpi&include=eJxLz89Pz0mNL0lM108HEjrpqHy9xKzEClTBXJ2igkz9pPz8kuKSosQCMC89Jz8pMUe3uKQyJzMvHQBaliBgwww.rpi.edu/sites/default/files/js/... 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https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeistMono-Regular.woff2 — 200 — 28.0 KiB — 21 ms — h2https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-solid-900.woff2www.rpi.edu/sites/all/libraries/fon... https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-solid-900.woff2 — 200 — 340.3 KiB — 34 ms — h2https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Regular.woff2www.rpi.edu/themes/custom/rpi/fonts... https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Regular.woff2 — 200 — 29.7 KiB — 23 ms — h2https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Bold.woff2www.rpi.edu/themes/custom/rpi/fonts... https://www.rpi.edu/themes/custom/rpi/fonts/RPIGeist-Bold.woff2 — 200 — 31.0 KiB — 25 ms — h2https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-light-300.woff2www.rpi.edu/sites/all/libraries/fon... https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-light-300.woff2 — 200 — 447.8 KiB — 56 ms — h2https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-brands-400.woff2www.rpi.edu/sites/all/libraries/fon... https://www.rpi.edu/sites/all/libraries/fontawesome/webfonts/fa-brands-400.woff2 — 200 — 115.7 KiB — 46 ms — h2https://alert.rpi.edu/alerts.js?_=1776810903071alert.rpi.edu/alerts.js?_=177681090... https://alert.rpi.edu/alerts.js?_=1776810903071 — 200 — 491 B — 399 ms — http/1.1https://www.rpi.edu/sites/default/files/styles/4x3_large/public/2026-03/54437082108-2560caf6d2-o-cropped.jpg?itok=t1tHvw9Pwww.rpi.edu/sites/default/files/sty... https://www.rpi.edu/sites/default/files/styles/4x3_large/public/2026-03/54437082108-2560caf6d2-o-cropped.jpg?itok=t1tHvw9P — 200 — 73.9 KiB — 11 ms — h2https://www.clarity.ms/tag/rxfz2i6zpq?ref=gtmwww.clarity.ms/tag/rxfz2i6zpq?ref=g... https://www.clarity.ms/tag/rxfz2i6zpq?ref=gtm — 200 — 1.1 KiB — 223 ms — http/1.1https://www.googletagmanager.com/gtag/js?id=G-TTXBMVKEJW&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-TTXBMVKEJW&cx=c&gtm=4e64h1 — 200 — 169.3 KiB — 75 ms — h2https://adp.eab.com/js/adp.min.jsadp.eab.com/js/adp.min.js https://adp.eab.com/js/adp.min.js — 200 — 497 B — 258 ms — h2https://analytics.google.com/g/collect?v=2&tid=G-TTXBMVKEJW&gtm=45je64h1v892353664z89172557041za20gzb9172557041zd9172557041&_p=1776810902969&_gaz=1&gcd=13l3l3l3l1l1&npa=0&dma=0&_eu=AAAAAGA&are=1&cid=450620686.1776810903&frm=0&pscdl=noapi&rcb=12&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115616986~115938466~115938469~117266400&sid=1776810903&sct=1&seg=0&dl=https%3A%2F%2Fwww.rpi.edu%2F&dt=Rensselaer%20Polytechnic%20Institute%20(RPI)%20%3A%3A%20Architecture%2C%20Business%2C%20Engineering%2C%20Humanities%2C%20IT%20%26%20Web%20Science%2C%20Science&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=569analytics.google.com/g/collect?v=2&... https://analytics.google.com/g/collect?v=2&tid=G-TTXBMVKEJW&gtm=45je64h1v892353664z89172557041za20gzb9172557041zd9172557041&_p=1776810902969&_gaz=1&gcd=13l3l3l3l1l1&npa=0&dma=0&_eu=AAAAAGA&are=1&cid=450620686.1776810903&frm=0&pscdl=noapi&rcb=12&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115616986~115938466~115938469~117266400&sid=1776810903&sct=1&seg=0&dl=https%3A%2F%2Fwww.rpi.edu%2F&dt=Rensselaer%20Polytechnic%20Institute%20(RPI)%20%3A%3A%20Architecture%2C%20Business%2C%20Engineering%2C%20Humanities%2C%20IT%20%26%20Web%20Science%2C%20Science&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=569 — 204 — 547 B — 49 ms — h2https://stats.g.doubleclick.net/g/collect?v=2&tid=G-TTXBMVKEJW&cid=450620686.1776810903&gtm=45je64h1v892353664z89172557041za20gzb9172557041zd9172557041&rcb=12&aip=1&dma=0&gcd=13l3l3l3l1l1&npa=0&frm=0&tag_exp=0~115616986~115938466~115938469~117266400stats.g.doubleclick.net/g/collect?v... https://stats.g.doubleclick.net/g/collect?v=2&tid=G-TTXBMVKEJW&cid=450620686.1776810903&gtm=45je64h1v892353664z89172557041za20gzb9172557041zd9172557041&rcb=12&aip=1&dma=0&gcd=13l3l3l3l1l1&npa=0&frm=0&tag_exp=0~115616986~115938466~115938469~117266400 — 204 — 547 B — 59 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 — 75 ms — h2https://rensselaer-polytechnic-institute.contact-server.com/mtc.jsrensselaer-polytechnic-institute.co... https://rensselaer-polytechnic-institute.contact-server.com/mtc.js — 200 — 4.2 KiB — 362 ms — h2https://b.clarity.ms/collectb.clarity.ms/collect 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h2https://c.clarity.ms/c.gif?ctsa=mr&CtsSyncId=2FC2810CDF914348B321F3F842185882&MUID=08F80D347342666D21F21A76723467A0c.clarity.ms/c.gif?ctsa=mr&CtsSyncI... https://c.clarity.ms/c.gif?ctsa=mr&CtsSyncId=2FC2810CDF914348B321F3F842185882&MUID=08F80D347342666D21F21A76723467A0 — 200 — 467 B — 28 ms — h2https://my.rpinow.org/mtc/eventmy.rpinow.org/mtc/event https://my.rpinow.org/mtc/event — 200 — 741 B — 544 ms — h2https://b.clarity.ms/collectb.clarity.ms/collect https://b.clarity.ms/collect — 204 — 275 B — 76 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
100% of JavaScript execution is third-party
First-party Third-party 517ms · 336KB · €6/mo
www.rpi.edu
Other
Optional
Execution 133ms
Transfer 10 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 95ms
Transfer 169 KB
Unused 40%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 79ms
Transfer 127 KB
Unused 47%
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 79ms
Transfer 0 KB
Monthly Cost €1/mo
rensselaer-polytechnic-institute.contact-server.com
Other
Optional
Execution 69ms
Transfer 4 KB
Monthly Cost €1/mo
Microsoft Clarity
Session Replay
Optional
Execution 62ms
Transfer 26 KB
Monthly Cost €1/mo

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.

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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

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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