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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
3
REVIEW
5
PASS
7
INFO
2

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

Mobile Desktop
52
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

3.89 s

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

5.34 s

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

780 ms

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

0.002

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

3.89 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.

10.54 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 5 REVIEW 3 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 (1.3 MiB of 1.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2855ms total JS execution
FIX
2855ms total JS execution
Warning::
https://www.ubc.ca/: 767ms CPU time
Warning::
Unattributable: 470ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-Q74J...: 375ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PGP...: 361ms CPU time
Warning::
https://sc-static.net/scevent.min.js: 344ms CPU time
Warning::
Third-party scripts: 2855ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Other 25% Style & Layout 13% Script Parsing & Compilation 7% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://www.ubc.ca/767ms10ms3ms3rd
Unattributable470ms19ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-Q74JQJCYJK&cx=c&gtm=4e64h1375ms308ms63ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PGPCK4W361ms305ms49ms3rd
https://sc-static.net/scevent.min.js344ms319ms15ms3rd
https://www.googletagmanager.com/gtag/js?id=DC-8341020&cx=c&gtm=4e64h1251ms213ms35ms3rd
https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js150ms106ms23ms3rd
https://www.ubc.ca/_assets/js/script.min.js?269ms30ms2ms3rd
https://www.google-analytics.com/analytics.js69ms54ms5ms3rd
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.

B
Page Weight Budget
1.3 MB transferred, 55 requests
REVIEW
1.3 MB transferred, 55 requests
Info::
Page weighs 2.8 MB (1.3 MB transferred)
Warning::
JavaScript is 565 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 565 KB
Info::
Fonts are 237 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 237 KB
Info::
55 HTTP requests
Info::
Estimated 0.28 g CO2 per page load
1.3 MB / 2.4 MB budget
1.3 MB transferred
55 requests
0.28 g CO2 per page load
JavaScript 565.0 KiB 42%
Images 376.6 KiB 28%
Fonts 237.2 KiB 18%
CSS 155.0 KiB 11%
HTML 9.4 KiB 1%
Other 3.6 KiB 0%
Other 679 B 0%
Other 651 B 0%
Other 449 B 0%
0 2.4 MB 4.9 MB
Under budget

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

C
Image Optimization
Action
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
https://www.ubc.ca/_cache/images/26013-holding_reu... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ubc.ca/_cache/images/26008-damaged_bri... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ubc.ca/_cache/images/25988-lind_galler... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ubc.ca/_cache/images/25993-researchers... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ubc.ca/_cache/images/26023-three_femal... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ubc.ca/_cache/images/26003-blowing_nos... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ubc.ca/_cache/images/25998-lexis_ly-54... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ubc.ca/_cache/images/25979-suzanne_sim... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ubc.ca/_cache/images/25983-bee_on_flow... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ubc.ca/_cache/images/26018-push_forwar... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 377 KB
0 oversized -0 KB
13 legacy format
10 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

C
JS Bundles
Action
14 scripts, 184 KB unused
REVIEW
14 scripts, 184 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PGP...: 64 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-Q74J...: 63 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=DC-834...: 57 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 184 KB
184 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-PGPCK4W159 KB64 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-Q74JQJCYJK&cx=c&gtm=4e64h1153 KB63 KB (41%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-8341020&cx=c&gtm=4e64h1129 KB57 KB (44%)✓3rd
https://www.ubc.ca/_assets/js/script.min.js?21 KB—✓3rd
https://www.google-analytics.com/analytics.js21 KB—✓3rd
https://cdn.ubc.ca/clf/globalutility/index.js?callback=clfCallback&_=17767994840932 KB—✓3rd
https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js34 KB—✓3rd
https://cdn.ubc.ca/clf/7.0.5/js/ubc-clf.min.js4 KB—✓3rd
https://sc-static.net/scevent.min.js25 KB—✓3rd
https://cdn-akamai.mookie1.com/LB/LightningBolt.js7 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
Page Weight Inventory
Action
55 resources · 1.3 MB · 184 KB savings available
REVIEW
55 resources · 1.3 MB · 184 KB savings available
Warning::
Page weight 325 KB over 1MB target
Got: 1.3 MB Expected: ≤ 1 MB
Info::
~184 KB of savings available
Warning::
54 third-party resources (100% of weight)
55 resources · 1.3 MiB · 54 third-party 324.6 KiB over 1MB target
JavaScript 42% · 565.0 KiB
Image 28% · 378.3 KiB
Font 18% · 237.2 KiB
CSS 11% · 155.0 KiB
Document 1% · 9.9 KiB
Other 0% · 3.1 KiB

~184.0 KiB of savings available

Remove unused JavaScript: 184.0 KiB
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 (237 KB)
PASS
4 fonts (237 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

237 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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 3.9 s LCP 5.3 sdata:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGAAAUAAKo8AAAAIEdQT1P8FbLEAACqXAAAJIJHU1VC6qUuJgAAz…truetype;base64,AAEAAAA... data:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGAAAUAAKo8AAAAIEdQT1P8FbLEAACqXAAAJIJHU1VC6qUuJgAAz… — 51.8 KiB — 68 ms — font-display: swapdata:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGCAAUAAMxIAAAAIEdQT1MAB7PzAADMaAAAIm5HU1VC6qUuJgAA7…truetype;base64,AAEAAAA... data:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGCAAUAAMxIAAAAIEdQT1MAB7PzAADMaAAAIm5HU1VC6qUuJgAA7… — 59.8 KiB — 73 ms — font-display: swapdata:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGAAAUAAM+oAAAAIEdQT1MBDrHqAADPyAAAJRJHU1VC6qUuJgAA9…truetype;base64,AAEAAAA... data:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGAAAUAAM+oAAAAIEdQT1MBDrHqAADPyAAAJRJHU1VC6qUuJgAA9… — 61.3 KiB — 75 ms — font-display: swaphttps://cdn.ubc.ca/clf/7.0.5/font/font-v4/fontawesome-webfont-ubc-v4.ttffontawesome-webfont-ubc... https://cdn.ubc.ca/clf/7.0.5/font/font-v4/fontawesome-webfont-ubc-v4.ttf — 64.2 KiB — 23 ms — font-display: swap
truetype;base64,AAEAAAA... unknown swap
Size 52 KB
Load time 68 ms
Start 509 ms
Risk FOUT — text flashes from fallback to web font
truetype;base64,AAEAAAA... unknown swap
Size 60 KB
Load time 73 ms
Start 510 ms
Risk FOUT — text flashes from fallback to web font
truetype;base64,AAEAAAA... unknown swap
Size 61 KB
Load time 75 ms
Start 511 ms
Risk FOUT — text flashes from fallback to web font
fontawesome-webfont-ubc... ttf swap
Size 64 KB
Load time 23 ms
Start 579 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~71 KB and ~142 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
55 requests over 1598ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 3.9 s LCP 5.3 shttps://ubc.ca// https://ubc.ca/ — 301 — 82 B — 276 ms — h2https://www.ubc.ca/www.ubc.ca/ https://www.ubc.ca/ — 200 — 6.6 KiB — 125 ms — h2https://cdn.ubc.ca/clf/7.0.5/css/ubc-clf-full-bw.min.csscdn.ubc.ca/clf/7.0.5/css/ubc-clf-fu... https://cdn.ubc.ca/clf/7.0.5/css/ubc-clf-full-bw.min.css — 200 — 34.7 KiB — 43 ms — h2https://cloud.typography.com/6804272/781004/css/fonts.csscloud.typography.com/6804272/781004... https://cloud.typography.com/6804272/781004/css/fonts.css — 302 — 414 B — 51 ms — http/1.1https://www.ubc.ca/_assets/css/style.min.css?11www.ubc.ca/_assets/css/style.min.cs... https://www.ubc.ca/_assets/css/style.min.css?11 — 200 — 7.8 KiB — 11 ms — h2https://www.ubc.ca/_cache/images/25979-suzanne_simard-780x780_1x.jpgwww.ubc.ca/_cache/images/25979-suza... https://www.ubc.ca/_cache/images/25979-suzanne_simard-780x780_1x.jpg — 200 — 43.0 KiB — 19 ms — h2https://www.ubc.ca/_cache/images/25983-bee_on_flower-540x540_2x.jpgwww.ubc.ca/_cache/images/25983-bee_... https://www.ubc.ca/_cache/images/25983-bee_on_flower-540x540_2x.jpg — 200 — 34.1 KiB — 17 ms — h2https://www.ubc.ca/_cache/images/25988-lind_gallery-540x540_2x.jpgwww.ubc.ca/_cache/images/25988-lind... https://www.ubc.ca/_cache/images/25988-lind_gallery-540x540_2x.jpg — 200 — 31.1 KiB — 9 ms — h2https://www.ubc.ca/_cache/images/25993-researchers-540x540_2x-1.jpgwww.ubc.ca/_cache/images/25993-rese... https://www.ubc.ca/_cache/images/25993-researchers-540x540_2x-1.jpg — 200 — 37.1 KiB — 41 ms — h2https://www.ubc.ca/_cache/images/26023-three_female_researchers-540x540_2x.jpgwww.ubc.ca/_cache/images/26023-thre... https://www.ubc.ca/_cache/images/26023-three_female_researchers-540x540_2x.jpg — 200 — 34.7 KiB — 7 ms — h2https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.jsajax.googleapis.com/ajax/libs/jquer... https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js — 200 — 33.8 KiB — 62 ms — h2https://cdn.ubc.ca/fonts/203149/A0ADCD08956775C73.csscdn.ubc.ca/fonts/203149/A0ADCD08956... https://cdn.ubc.ca/fonts/203149/A0ADCD08956775C73.css — 200 — 112.5 KiB — 12 ms — h2https://cdn.ubc.ca/clf/7.0.5/js/ubc-clf.min.jscdn.ubc.ca/clf/7.0.5/js/ubc-clf.min... https://cdn.ubc.ca/clf/7.0.5/js/ubc-clf.min.js — 200 — 4.2 KiB — 5 ms — h2https://www.ubc.ca/_assets/js/script.min.js?2www.ubc.ca/_assets/js/script.min.js... https://www.ubc.ca/_assets/js/script.min.js?2 — 200 — 1.3 KiB — 19 ms — h2https://www.ubc.ca/_cache/images/26018-push_forward_wildfire-540x540_2x.jpgwww.ubc.ca/_cache/images/26018-push... https://www.ubc.ca/_cache/images/26018-push_forward_wildfire-540x540_2x.jpg — 200 — 30.4 KiB — 30 ms — h2https://www.ubc.ca/_cache/images/26013-holding_reusable_cup-540x540_2x.jpgwww.ubc.ca/_cache/images/26013-hold... https://www.ubc.ca/_cache/images/26013-holding_reusable_cup-540x540_2x.jpg — 200 — 24.2 KiB — 25 ms — h2https://www.ubc.ca/_cache/images/26008-damaged_bridge-540x540_2x.jpgwww.ubc.ca/_cache/images/26008-dama... https://www.ubc.ca/_cache/images/26008-damaged_bridge-540x540_2x.jpg — 200 — 36.7 KiB — 30 ms — h2https://www.ubc.ca/_cache/images/26003-blowing_nose_flower_field-540x540_2x.jpgwww.ubc.ca/_cache/images/26003-blow... https://www.ubc.ca/_cache/images/26003-blowing_nose_flower_field-540x540_2x.jpg — 200 — 34.4 KiB — 31 ms — h2https://www.ubc.ca/_cache/images/25998-lexis_ly-540x540_2x.jpgwww.ubc.ca/_cache/images/25998-lexi... https://www.ubc.ca/_cache/images/25998-lexis_ly-540x540_2x.jpg — 200 — 30.3 KiB — 30 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-PGPCK4Wwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-PGPCK4W — 200 — 159.3 KiB — 111 ms — h2https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 36 ms — h2https://cdn.ubc.ca/clf/7.0.5/img/ubc7-clf-sprite-blue-2x.pngcdn.ubc.ca/clf/7.0.5/img/ubc7-clf-s... https://cdn.ubc.ca/clf/7.0.5/img/ubc7-clf-sprite-blue-2x.png — 200 — 40.1 KiB — 22 ms — h2data:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGAAAUAAKo8AAAAIEdQT1P8FbLEAACqXAAAJIJHU1VC6qUuJgAAz…data:font/truetype;base64,AAEAAAASA... data:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGAAAUAAKo8AAAAIEdQT1P8FbLEAACqXAAAJIJHU1VC6qUuJgAAz… — 200 — 51.8 KiB — 68 ms — datadata:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGCAAUAAMxIAAAAIEdQT1MAB7PzAADMaAAAIm5HU1VC6qUuJgAA7…data:font/truetype;base64,AAEAAAASA... data:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGCAAUAAMxIAAAAIEdQT1MAB7PzAADMaAAAIm5HU1VC6qUuJgAA7… — 200 — 59.8 KiB — 73 ms — datadata:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGAAAUAAM+oAAAAIEdQT1MBDrHqAADPyAAAJRJHU1VC6qUuJgAA9…data:font/truetype;base64,AAEAAAASA... data:font/truetype;base64,AAEAAAASAQAABAAgR0RFRgGAAAUAAM+oAAAAIEdQT1MBDrHqAADPyAAAJRJHU1VC6qUuJgAA9… — 200 — 61.3 KiB — 75 ms — 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h3https://8341020.fls.doubleclick.net/activityi;src=8341020;type=ubcr90;cat=ubcal0;rcb=17;ord=1;num=3842723057712;npa=0;auiddc=783529051.1776799484;uaa=;uab=64;uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164;uamb=1;uam=moto%20g%20power%20(2022);uap=Android;uapv=11.0;uaw=0;pscdl=noapi;frm=0;_tu=KJA;gtm=45fe64h1v9190981768z879661699za20gzb79661699zd79661699xea;gcd=13l3l3l3l1l1;dma=0;dc_fmt=2;tag_exp=0~115938465~115938469~117266400~118463261;epver=2;dc_random=1776799484_wFEWWe_LjChOhxnjKo78wDmxoTlm9XzngA;_dc_test=1;~oref=https%3A%2F%2Fwww.ubc.ca%2F?8341020.fls.doubleclick.net/activit... https://8341020.fls.doubleclick.net/activityi;src=8341020;type=ubcr90;cat=ubcal0;rcb=17;ord=1;num=3842723057712;npa=0;auiddc=783529051.1776799484;uaa=;uab=64;uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164;uamb=1;uam=moto%20g%20power%20(2022);uap=Android;uapv=11.0;uaw=0;pscdl=noapi;frm=0;_tu=KJA;gtm=45fe64h1v9190981768z879661699za20gzb79661699zd79661699xea;gcd=13l3l3l3l1l1;dma=0;dc_fmt=2;tag_exp=0~115938465~115938469~117266400~118463261;epver=2;dc_random=1776799484_wFEWWe_LjChOhxnjKo78wDmxoTlm9XzngA;_dc_test=1;~oref=https%3A%2F%2Fwww.ubc.ca%2F? — 200 — 979 B — 91 ms — h2https://www.google.com/ccm/collect?rcb=17&frm=0&en=page_view&dl=https%3A%2F%2Fwww.ubc.ca%2F&scrsrc=www.googletagmanager.com&rnd=599916725.1776799484&dt=The%20University%20of%20British%20Columbia&auid=783529051.1776799484&navt=n&npa=0&gtm=45fe64h1v9190981768z879661699za20gzb79661699zd79661699xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115938465~115938469~117266400~118463261&apve=1&apvf=f&apvc=0&tids=DC-8341020&tid=DC-8341020&tft=1776799484602&tfd=1124www.google.com/ccm/collect?rcb=17&f... https://www.google.com/ccm/collect?rcb=17&frm=0&en=page_view&dl=https%3A%2F%2Fwww.ubc.ca%2F&scrsrc=www.googletagmanager.com&rnd=599916725.1776799484&dt=The%20University%20of%20British%20Columbia&auid=783529051.1776799484&navt=n&npa=0&gtm=45fe64h1v9190981768z879661699za20gzb79661699zd79661699xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115938465~115938469~117266400~118463261&apve=1&apvf=f&apvc=0&tids=DC-8341020&tid=DC-8341020&tft=1776799484602&tfd=1124 — 200 — 21 B — 35 ms — h3https://cdn-akamai.mookie1.com/adv/default.jscdn-akamai.mookie1.com/adv/default.... https://cdn-akamai.mookie1.com/adv/default.js — 200 — 918 B — 46 ms — http/1.1https://adservice.google.com/ddm/fls/z/src=8341020;type=ubcr90;cat=ubcal0;rcb=17;ord=1;num=3842723057712;npa=0;auiddc=*;uaa=;uab=64;uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164;uamb=1;uam=moto%20g%20power%20(2022);uap=Android;uapv=11.0;uaw=0;pscdl=noapi;frm=0;_tu=KJA;gtm=45fe64h1v9190981768z879661699za20gzb79661699zd79661699xea;gcd=13l3l3l3l1l1;dma=0;dc_fmt=2;tag_exp=0~115938465~115938469~117266400~118463261;epver=2;dc_random=1776799484_wFEWWe_LjChOhxnjKo78wDmxoTlm9XzngA;_dc_test=1;~oref=https%3A%2F%2Fwww.ubc.ca%2Fadservice.google.com/ddm/fls/z/src=... https://adservice.google.com/ddm/fls/z/src=8341020;type=ubcr90;cat=ubcal0;rcb=17;ord=1;num=3842723057712;npa=0;auiddc=*;uaa=;uab=64;uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164;uamb=1;uam=moto%20g%20power%20(2022);uap=Android;uapv=11.0;uaw=0;pscdl=noapi;frm=0;_tu=KJA;gtm=45fe64h1v9190981768z879661699za20gzb79661699zd79661699xea;gcd=13l3l3l3l1l1;dma=0;dc_fmt=2;tag_exp=0~115938465~115938469~117266400~118463261;epver=2;dc_random=1776799484_wFEWWe_LjChOhxnjKo78wDmxoTlm9XzngA;_dc_test=1;~oref=https%3A%2F%2Fwww.ubc.ca%2F — 302 — 22 B — 50 ms — h3https://tr.snapchat.com/cm/s?bt=1d53c387&pnid=140&cb=1776799484717&u_scsid=6806d71f-86bb-4a11-a0e7-e64575f7b701&u_sclid=6bce0042-9e72-41ba-bac2-06ee901e97b4tr.snapchat.com/cm/s?bt=1d53c387&pn... https://tr.snapchat.com/cm/s?bt=1d53c387&pnid=140&cb=1776799484717&u_scsid=6806d71f-86bb-4a11-a0e7-e64575f7b701&u_sclid=6bce0042-9e72-41ba-bac2-06ee901e97b4 — 302 — 331 B — 68 ms — h2https://adservice.google.com/ddm/fls/z/src=8341020;dc_pre=CMW5gfHV_5MDFYTM5wMdjrguNA;type=ubcr90;cat=ubcal0;rcb=17;ord=1;num=3842723057712;npa=0;auiddc=*;uaa=;uab=64;uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164;uamb=1;uam=moto%20g%20power%20(2022);uap=Android;uapv=11.0;uaw=0;pscdl=noapi;frm=0;_tu=KJA;gtm=45fe64h1v9190981768z879661699za20gzb79661699zd79661699xea;gcd=13l3l3l3l1l1;dma=0;dc_fmt=2;tag_exp=0~115938465~115938469~117266400~118463261;epver=2;dc_random=1776799484_wFEWWe_LjChOhxnjKo78wDmxoTlm9XzngA;_dc_test=1;~oref=https%3A%2F%2Fwww.ubc.ca%2Fadservice.google.com/ddm/fls/z/src=... https://adservice.google.com/ddm/fls/z/src=8341020;dc_pre=CMW5gfHV_5MDFYTM5wMdjrguNA;type=ubcr90;cat=ubcal0;rcb=17;ord=1;num=3842723057712;npa=0;auiddc=*;uaa=;uab=64;uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164;uamb=1;uam=moto%20g%20power%20(2022);uap=Android;uapv=11.0;uaw=0;pscdl=noapi;frm=0;_tu=KJA;gtm=45fe64h1v9190981768z879661699za20gzb79661699zd79661699xea;gcd=13l3l3l3l1l1;dma=0;dc_fmt=2;tag_exp=0~115938465~115938469~117266400~118463261;epver=2;dc_random=1776799484_wFEWWe_LjChOhxnjKo78wDmxoTlm9XzngA;_dc_test=1;~oref=https%3A%2F%2Fwww.ubc.ca%2F — 200 — 63 B — 26 ms — h3https://pixel.tapad.com/idsync/ex/push?partner_id=2884&partner_url=https%3A%2F%2Ftr.snapchat.com%2Fcm%2Fp%3Frand%3D1776728686508%26pnid%3D140%26pcid%3D%24%7BTA_DEVICE_ID%7Dpixel.tapad.com/idsync/ex/push?part... https://pixel.tapad.com/idsync/ex/push?partner_id=2884&partner_url=https%3A%2F%2Ftr.snapchat.com%2Fcm%2Fp%3Frand%3D1776728686508%26pnid%3D140%26pcid%3D%24%7BTA_DEVICE_ID%7D — 302 — 692 B — 71 ms — h2https://tr6.snapchat.com/ptr6.snapchat.com/p https://tr6.snapchat.com/p — 200 — 47 B — 70 ms — h2https://www.google.com/gmp/conversion/_dc_unique_id=1815854162288810619;_dc_ptd=ChEI8MCczwYQkY-Q6afjxZ38ARIfAGaq-NJgaclA4pr_Nzs1xYwm4aCVBeVvCGCEnJKQQA;_dc_time=1776799484;src=8341020;type=ubcr90;cat=ubcal0;rcb=17;ord=1;num=3842723057712;npa=0;auiddc=783529051.1776799484;uaa=;uab=64;uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164;uamb=1;uam=moto%20g%20power%20(2022);uap=Android;uapv=11.0;uaw=0;pscdl=noapi;frm=0;_tu=KJA;gtm=45fe64h1v9190981768z879661699za20gzb79661699zd79661699xea;gcd=13l3l3l3l1l1;dma=0;dc_fmt=3;tag_exp=0~115938465~115938469~117266400~118463261;epver=2;dc_random=1776799484_wFEWWe_LjChOhxnjKo78wDmxoTlm9XzngA;~oref=https%3A%2F%2Fwww.ubc.ca%2F?www.google.com/gmp/conversion/_dc_u... https://www.google.com/gmp/conversion/_dc_unique_id=1815854162288810619;_dc_ptd=ChEI8MCczwYQkY-Q6afjxZ38ARIfAGaq-NJgaclA4pr_Nzs1xYwm4aCVBeVvCGCEnJKQQA;_dc_time=1776799484;src=8341020;type=ubcr90;cat=ubcal0;rcb=17;ord=1;num=3842723057712;npa=0;auiddc=783529051.1776799484;uaa=;uab=64;uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164;uamb=1;uam=moto%20g%20power%20(2022);uap=Android;uapv=11.0;uaw=0;pscdl=noapi;frm=0;_tu=KJA;gtm=45fe64h1v9190981768z879661699za20gzb79661699zd79661699xea;gcd=13l3l3l3l1l1;dma=0;dc_fmt=3;tag_exp=0~115938465~115938469~117266400~118463261;epver=2;dc_random=1776799484_wFEWWe_LjChOhxnjKo78wDmxoTlm9XzngA;~oref=https%3A%2F%2Fwww.ubc.ca%2F? — 200 — 63 B — 245 ms — h3https://pixel.tapad.com/idsync/ex/push/check?partner_id=2884&partner_url=https%3A%2F%2Ftr.snapchat.com%2Fcm%2Fp%3Frand%3D1776728686508%26pnid%3D140%26pcid%3D%24%7BTA_DEVICE_ID%7Dpixel.tapad.com/idsync/ex/push/chec... https://pixel.tapad.com/idsync/ex/push/check?partner_id=2884&partner_url=https%3A%2F%2Ftr.snapchat.com%2Fcm%2Fp%3Frand%3D1776728686508%26pnid%3D140%26pcid%3D%24%7BTA_DEVICE_ID%7D — 302 — 387 B — 40 ms — h2https://tr.snapchat.com/cm/p?rand=1776728686508&pnid=140&pcid=0413d692-9117-480b-bbdd-7cd4fff6850dtr.snapchat.com/cm/p?rand=177672868... https://tr.snapchat.com/cm/p?rand=1776728686508&pnid=140&pcid=0413d692-9117-480b-bbdd-7cd4fff6850d — 200 — 17 B — 67 ms — h3https://cdn.ubc.ca/clf/7.0.5/img/favicon.icocdn.ubc.ca/clf/7.0.5/img/favicon.ic... https://cdn.ubc.ca/clf/7.0.5/img/favicon.ico — 200 — 1.7 KiB — 7 ms — h2https://tr.snapchat.com/ptr.snapchat.com/p https://tr.snapchat.com/p — 200 — 86 B — 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 2855ms · 530KB · CA$39/mo
www.ubc.ca
Other
Costly
Execution 767ms
Transfer 7 KB
Monthly Cost CA$11/mo
Unattributable
Other
Costly
Execution 470ms
Transfer 0 KB
Monthly Cost CA$6/mo
Google Tag Manager
Tag Manager
Costly
Execution 375ms
Transfer 153 KB
Unused 41%
Monthly Cost CA$5/mo
Google Tag Manager
Tag Manager
Costly
Execution 361ms
Transfer 159 KB
Unused 40%
Monthly Cost CA$5/mo
sc-static.net
Other
Costly
Execution 344ms
Transfer 25 KB
Monthly Cost CA$5/mo
Google Tag Manager
Tag Manager
Costly
Execution 251ms
Transfer 129 KB
Unused 44%
Monthly Cost CA$3/mo
ajax.googleapis.com
Other
Optional
Execution 150ms
Transfer 34 KB
Monthly Cost CA$2/mo
www.ubc.ca
Other
Optional
Execution 69ms
Transfer 1 KB
Monthly Cost CA$1/mo
Google Analytics
Analytics
Optional
Execution 69ms
Transfer 21 KB
Monthly Cost CA$1/mo

These scripts may cost more than they're worth

  • www.ubc.ca adds 767ms and costs ~CA$11/month
  • Unattributable adds 470ms and costs ~CA$6/month
  • Google Tag Manager adds 375ms and costs ~CA$5/month
  • Google Tag Manager adds 361ms and costs ~CA$5/month
  • sc-static.net adds 344ms and costs ~CA$5/month
  • Google Tag Manager adds 251ms and costs ~CA$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.ubc.ca takes 767ms 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 470ms 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 375ms 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 361ms 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

sc-static.net takes 344ms 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 251ms 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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