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https://concordia.ca

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
5
REVIEW
3
PASS
7
INFO
2

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

Mobile Desktop
24
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
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.

5.12 s

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

15.07 s

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

613 ms

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

0.653

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

5.17 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.

15.14 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
10.0 MB transferred, 55 requests
FIX
10.0 MB transferred, 55 requests
Critical::
Page weighs 12.0 MB (10.0 MB transferred)
Warning::
Images are 8.9 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 8.9 MB
Info::
Fonts are 339 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 339 KB
Info::
55 HTTP requests
Info::
Estimated 2.1 g CO2 per page load
10.0 MB / 2.4 MB budget
10.0 MB transferred
55 requests
2.1 g CO2 per page load
Images 8.9 MiB 89%
JavaScript 459.8 KiB 4%
Fonts 339.1 KiB 3%
CSS 143.7 KiB 1%
Other 54.7 KiB 1%
Other 47.9 KiB 0%
HTML 30.1 KiB 0%
Other 662 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

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
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (10.0 MiB of 10.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3031ms total JS execution
FIX
3031ms total JS execution
Warning::
Unattributable: 795ms CPU time
Warning::
https://www.concordia.ca/: 711ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-57B...: 446ms CPU time
Warning::
https://cscript-cdn-use.concordia.ca/loader.js: 304ms CPU time
Warning::
https://www.concordia.ca/etc/designs/concordia/con...: 257ms CPU time
Warning::
Third-party scripts: 3031ms (100% of total)

Main Thread Breakdown

Script Evaluation 38% Other 32% Style & Layout 14% Script Parsing & Compilation 7% Rendering 4% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
Unattributable795ms26ms0ms3rd
https://www.concordia.ca/711ms20ms7ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-57BSZT446ms384ms55ms3rd
https://cscript-cdn-use.concordia.ca/loader.js304ms171ms63ms3rd
https://www.concordia.ca/etc/designs/concordia/concordia-master-clientlibs.min.4b7fe1fc4e66e318dc2fe31d8343635d.js257ms190ms6ms3rd
https://connect.facebook.net/signals/config/1306177216104224?v=2.9.303&r=stable&domain=www.concordia.ca&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168156ms130ms25ms3rd
https://connect.facebook.net/en_US/fbevents.js155ms119ms35ms3rd
https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/jquery.min.88fc740c0c81068c14c7431c45e9f4dc.js149ms125ms11ms3rd
https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/bootstrap.min.fe96f9dd36170e0e5cdf9aeee3a03e99.js58ms31ms8ms3rd
D
Page Weight Inventory
Action
55 resources · 10.0 MB · 188 KB savings available
FIX
55 resources · 10.0 MB · 188 KB savings available
Warning::
Page weight 9.0 MB over 1MB target
Got: 10.0 MB Expected: ≤ 1 MB
Info::
~188 KB of savings available
Warning::
54 third-party resources (100% of weight)
Info::
4 resources over 200KB
55 resources · 10.0 MiB · 54 third-party 9.0 MiB over 1MB target
Image 90% · 9.0 MiB
JavaScript 5% · 498.0 KiB
Font 3% · 339.1 KiB
CSS 1% · 143.7 KiB
Document 0% · 32.8 KiB
Other 0% · 7.8 KiB

~187.5 KiB of savings available

Remove unused JavaScript: 187.5 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
18 images, 0 KB saveable
REVIEW
18 images, 0 KB saveable
Warning::
https://www.concordia.ca/etc/designs/concordia/cli... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.concordia.ca/content/concordia/en/web/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
18 images 8.9 MB
0 oversized -0 KB
18 legacy format
2 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

C
JS Bundles
Action
11 scripts, 188 KB unused
REVIEW
11 scripts, 188 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-57B...: 81 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://connect.facebook.net/en_US/fbevents.js: 34 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.concordia.ca/etc/designs/concordia/cli...: 28 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.concordia.ca/etc/designs/concordia/cli...: 24 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.concordia.ca/etc/designs/concordia/cli...: 21 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 188 KB
188 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-57BSZT166 KB81 KB (49%)✓3rd
https://connect.facebook.net/en_US/fbevents.js97 KB34 KB (35%)✓3rd
https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/jquery.min.88fc740c0c81068c14c7431c45e9f4dc.js50 KB28 KB (56%)✓3rd
https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/bootstrap.min.fe96f9dd36170e0e5cdf9aeee3a03e99.js31 KB24 KB (77%)✓3rd
https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/jquery-ui.min.f682feedd6ecc56f5db71cfdaa48a41f.js26 KB21 KB (80%)✓3rd
https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/picturefill.min.893eed8d44a0e92621a02d4252223d82.js1 KB—✓3rd
https://www.concordia.ca/etc/designs/concordia/concordia-master-clientlibs.min.4b7fe1fc4e66e318dc2fe31d8343635d.js16 KB—✓3rd
https://cscript-cdn-use.concordia.ca/loader.js29 KB—✓3rd
https://cscript-cdn-use.cassiecloud.com/versions/4/widget.js27 KB—✓3rd
https://connect.facebook.net/signals/config/1306177216104224?v=2.9.303&r=stable&domain=www.concordia.ca&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C16845 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
6 fonts (339 KB)
PASS
6 fonts (339 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

339 KB total

Render-blocking

0

of 6

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 5.1 s LCP 15.1 shttps://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2UcC73FwrK3iLTeHuS_nVMrM... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 47.3 KiB — 12 ms — font-display: swaphttps://use.typekit.net/af/3447ab/00000000000000007735bb95/31/l?primer=f592e0a4b9356877842506ce344308576437e4f677d7c9b78ca2162e6cad991a&fvd=n4&v=3l https://use.typekit.net/af/3447ab/00000000000000007735bb95/31/l?primer=f592e0a4b9356877842506ce344308576437e4f677d7c9b78ca2162e6cad991a&fvd=n4&v=3 — 60.0 KiB — 19 ms — font-display: swaphttps://use.typekit.net/af/0691b8/00000000000000007735bbbf/31/l?primer=f592e0a4b9356877842506ce344308576437e4f677d7c9b78ca2162e6cad991a&fvd=n6&v=3l https://use.typekit.net/af/0691b8/00000000000000007735bbbf/31/l?primer=f592e0a4b9356877842506ce344308576437e4f677d7c9b78ca2162e6cad991a&fvd=n6&v=3 — 60.7 KiB — 26 ms — font-display: swaphttps://use.typekit.net/af/3e7927/00000000000000007735bbb7/31/l?primer=f592e0a4b9356877842506ce344308576437e4f677d7c9b78ca2162e6cad991a&fvd=n5&v=3l https://use.typekit.net/af/3e7927/00000000000000007735bbb7/31/l?primer=f592e0a4b9356877842506ce344308576437e4f677d7c9b78ca2162e6cad991a&fvd=n5&v=3 — 57.0 KiB — 22 ms — font-display: swaphttps://use.typekit.net/af/a6059f/00000000000000007735bb97/31/l?primer=f592e0a4b9356877842506ce344308576437e4f677d7c9b78ca2162e6cad991a&fvd=n8&v=3l https://use.typekit.net/af/a6059f/00000000000000007735bb97/31/l?primer=f592e0a4b9356877842506ce344308576437e4f677d7c9b78ca2162e6cad991a&fvd=n8&v=3 — 56.1 KiB — 41 ms — font-display: swaphttps://use.typekit.net/af/577ff5/00000000000000007735bb73/31/l?primer=f592e0a4b9356877842506ce344308576437e4f677d7c9b78ca2162e6cad991a&fvd=n7&v=3l https://use.typekit.net/af/577ff5/00000000000000007735bb73/31/l?primer=f592e0a4b9356877842506ce344308576437e4f677d7c9b78ca2162e6cad991a&fvd=n7&v=3 — 58.0 KiB — 9 ms — font-display: swap
UcC73FwrK3iLTeHuS_nVMrM... woff2 swap
Size 47 KB
Load time 12 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 60 KB
Load time 19 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 61 KB
Load time 26 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 57 KB
Load time 22 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 56 KB
Load time 41 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 58 KB
Load time 9 ms
Start 1.3 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)
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
55 requests over 3511ms
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 5.1 s LCP 15.1 shttps://concordia.ca// https://concordia.ca/ — 307 — 90 B — 222 ms — http/1.1https://www.concordia.ca/www.concordia.ca/ https://www.concordia.ca/ — 200 — 30.1 KiB — 364 ms — h2https://use.typekit.net/ewy3egs.cssuse.typekit.net/ewy3egs.css https://use.typekit.net/ewy3egs.css — 200 — 1.8 KiB — 29 ms — h2https://fonts.googleapis.com/css2?family=Inter:wght@100..900&display=swapfonts.googleapis.com/css2?family=In... https://fonts.googleapis.com/css2?family=Inter:wght@100..900&display=swap — 200 — 1.1 KiB — 95 ms — h2https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/bootstrap.min.5e8e1d3b23865d537f98eb1d12ecf5d3.csswww.concordia.ca/etc/designs/concor... https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/bootstrap.min.5e8e1d3b23865d537f98eb1d12ecf5d3.css — 200 — 48.5 KiB — 203 ms — h2https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/jquery-ui.min.7fb2f297bef3e44aaaa0b7ea0fc4cd4f.csswww.concordia.ca/etc/designs/concor... https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/jquery-ui.min.7fb2f297bef3e44aaaa0b7ea0fc4cd4f.css — 200 — 4.6 KiB — 298 ms — h2https://www.concordia.ca/etc/designs/concordia/concordia-master-clientlibs.min.5b4a44d70dd2ac78ff9313d6d663aa5c.csswww.concordia.ca/etc/designs/concor... https://www.concordia.ca/etc/designs/concordia/concordia-master-clientlibs.min.5b4a44d70dd2ac78ff9313d6d663aa5c.css — 200 — 78.2 KiB — 481 ms — h2https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/bootstrap.min.fe96f9dd36170e0e5cdf9aeee3a03e99.jswww.concordia.ca/etc/designs/concor... https://www.concordia.ca/etc/designs/concordia/clientlibs/vendor/bootstrap.min.fe96f9dd36170e0e5cdf9aeee3a03e99.js — 200 — 30.9 KiB — 361 ms — 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h2https://cscript-cdn-use.cassiecloud.com/414E0D0E-BBCC-4D69-95C5-FE1D15F8C496/V2/1_Default.jsoncscript-cdn-use.cassiecloud.com/414... https://cscript-cdn-use.cassiecloud.com/414E0D0E-BBCC-4D69-95C5-FE1D15F8C496/V2/1_Default.json — 200 — 5.2 KiB — 244 ms — h2https://connect.facebook.net/signals/config/1306177216104224?v=2.9.303&r=stable&domain=www.concordia.ca&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168connect.facebook.net/signals/config... https://connect.facebook.net/signals/config/1306177216104224?v=2.9.303&r=stable&domain=www.concordia.ca&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168 — 200 — 44.9 KiB — 118 ms — h3https://www.facebook.com/tr/?id=1306177216104224&ev=PageView&dl=https%3A%2F%2Fwww.concordia.ca%2F&rl=&if=false&ts=1776892955625&sw=412&sh=823&v=2.9.303&r=stable&a=tmgoogletagmanager&ec=0&o=12318&fbp=fb.1.1776892955615.602484491755279530&ler=empty&cdl=API_unavailable&pmd[title]=Concordia%20University&pmd[locale]=en&plt=1284.5&it=1776892955461&coo=false&chmd=moto%20g%20power%20(2022)&chpv=11.0&chfv=undefined&expv2[0]=pl0&expv2[1]=el2&expv2[2]=bc1&expv2[3]=ra2&expv2[4]=rp2&expv2[5]=ct3&expv2[6]=hf1&rqm=GETwww.facebook.com/tr/?id=13061772161... https://www.facebook.com/tr/?id=1306177216104224&ev=PageView&dl=https%3A%2F%2Fwww.concordia.ca%2F&rl=&if=false&ts=1776892955625&sw=412&sh=823&v=2.9.303&r=stable&a=tmgoogletagmanager&ec=0&o=12318&fbp=fb.1.1776892955615.602484491755279530&ler=empty&cdl=API_unavailable&pmd[title]=Concordia%20University&pmd[locale]=en&plt=1284.5&it=1776892955461&coo=false&chmd=moto%20g%20power%20(2022)&chpv=11.0&chfv=undefined&expv2[0]=pl0&expv2[1]=el2&expv2[2]=bc1&expv2[3]=ra2&expv2[4]=rp2&expv2[5]=ct3&expv2[6]=hf1&rqm=GET — 200 — 16 B — 17 ms — h3https://www.facebook.com/privacy_sandbox/pixel/register/trigger/?id=1306177216104224&ev=PageView&dl=https%3A%2F%2Fwww.concordia.ca%2F&rl=&if=false&ts=1776892955625&sw=412&sh=823&v=2.9.303&r=stable&a=tmgoogletagmanager&ec=0&o=12318&fbp=fb.1.1776892955615.602484491755279530&ler=empty&cdl=API_unavailable&pmd[title]=Concordia%20University&pmd[locale]=en&plt=1284.5&it=1776892955461&coo=false&chmd=moto%20g%20power%20(2022)&chpv=11.0&chfv=undefined&expv2[0]=pl0&expv2[1]=el2&expv2[2]=bc1&expv2[3]=ra2&expv2[4]=rp2&expv2[5]=ct3&expv2[6]=hf1&rqm=FGETwww.facebook.com/privacy_sandbox/pi... https://www.facebook.com/privacy_sandbox/pixel/register/trigger/?id=1306177216104224&ev=PageView&dl=https%3A%2F%2Fwww.concordia.ca%2F&rl=&if=false&ts=1776892955625&sw=412&sh=823&v=2.9.303&r=stable&a=tmgoogletagmanager&ec=0&o=12318&fbp=fb.1.1776892955615.602484491755279530&ler=empty&cdl=API_unavailable&pmd[title]=Concordia%20University&pmd[locale]=en&plt=1284.5&it=1776892955461&coo=false&chmd=moto%20g%20power%20(2022)&chpv=11.0&chfv=undefined&expv2[0]=pl0&expv2[1]=el2&expv2[2]=bc1&expv2[3]=ra2&expv2[4]=rp2&expv2[5]=ct3&expv2[6]=hf1&rqm=FGET — 200 — 199 B — 326 ms — h3https://ids-use.concordia.ca/Home/Index?accessKey=51f5420f-fce8-4b25-b40d-c315e47c77af&domain=concordia.ca&cookieCollectionId=1&expiryDays=365ids-use.concordia.ca/Home/Index?acc... https://ids-use.concordia.ca/Home/Index?accessKey=51f5420f-fce8-4b25-b40d-c315e47c77af&domain=concordia.ca&cookieCollectionId=1&expiryDays=365 — 200 — 441 B — 207 ms — h2https://cscript-cdn-use.cassiecloud.com/templates/2/template.min.csscscript-cdn-use.cassiecloud.com/tem... https://cscript-cdn-use.cassiecloud.com/templates/2/template.min.css — 200 — 4.2 KiB — 12 ms — h2https://cscript-cdn-use.cassiecloud.com/templates/2/index.min.htmlcscript-cdn-use.cassiecloud.com/tem... https://cscript-cdn-use.cassiecloud.com/templates/2/index.min.html — 200 — 2.7 KiB — 9 ms — h2https://cscript-cdn-use.cassiecloud.com/templates/2/template.min.jscscript-cdn-use.cassiecloud.com/tem... https://cscript-cdn-use.cassiecloud.com/templates/2/template.min.js — 200 — 10.8 KiB — 9 ms — h2https://cscript-cdn-use.cassiecloud.com/templates/2/Images/cassie_logo_white.svgcscript-cdn-use.cassiecloud.com/tem... https://cscript-cdn-use.cassiecloud.com/templates/2/Images/cassie_logo_white.svg — 200 — 1.5 KiB — 31 ms — h2https://www.concordia.ca/etc/designs/concordia/favicon.icowww.concordia.ca/etc/designs/concor... https://www.concordia.ca/etc/designs/concordia/favicon.ico — 200 — 28.7 KiB — 117 ms — h2https://www.concordia.ca/etc/designs/concordia/clientlibs/img/favicons/android-chrome-192x192.pngwww.concordia.ca/etc/designs/concor... https://www.concordia.ca/etc/designs/concordia/clientlibs/img/favicons/android-chrome-192x192.png — 200 — 5.9 KiB — 118 ms — h2https://www.concordia.ca/etc/designs/concordia/clientlibs/img/favicons/favicon-32x32.pngwww.concordia.ca/etc/designs/concor... https://www.concordia.ca/etc/designs/concordia/clientlibs/img/favicons/favicon-32x32.png — 200 — 1.1 KiB — 73 ms — h2
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 3031ms · 463KB · CA$42/mo
Unattributable
Other
Costly
Execution 795ms
Transfer 0 KB
Monthly Cost CA$11/mo
www.concordia.ca
Other
Costly
Execution 711ms
Transfer 30 KB
Monthly Cost CA$10/mo
Google Tag Manager
Tag Manager
Costly
Execution 446ms
Transfer 166 KB
Unused 49%
Monthly Cost CA$6/mo
cscript-cdn-use.concordia.ca
Other
Costly
Execution 304ms
Transfer 29 KB
Monthly Cost CA$4/mo
www.concordia.ca
Other
Costly
Execution 257ms
Transfer 16 KB
Monthly Cost CA$4/mo
Facebook Pixel
Advertising
Optional
Execution 156ms
Transfer 45 KB
Monthly Cost CA$2/mo
Facebook Pixel
Advertising
Optional
Execution 155ms
Transfer 97 KB
Unused 35%
Monthly Cost CA$2/mo
www.concordia.ca
Other
Optional
Execution 149ms
Transfer 50 KB
Unused 56%
Monthly Cost CA$2/mo
www.concordia.ca
Other
Optional
Execution 58ms
Transfer 31 KB
Unused 77%
Monthly Cost CA$1/mo

These scripts may cost more than they're worth

  • Unattributable adds 795ms and costs ~CA$11/month
  • www.concordia.ca adds 711ms and costs ~CA$10/month
  • Google Tag Manager adds 446ms and costs ~CA$6/month
  • cscript-cdn-use.concordia.ca adds 304ms and costs ~CA$4/month
  • www.concordia.ca adds 257ms and costs ~CA$4/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

Unattributable takes 795ms 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.concordia.ca takes 711ms 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 446ms 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

cscript-cdn-use.concordia.ca takes 304ms 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.concordia.ca takes 257ms 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

56% of www.concordia.ca'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

77% of www.concordia.ca'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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