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https://toronto.ca

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
3
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
95
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
99
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.
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.

623 ms

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

1.42 s

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

50 ms

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

0.047

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

1.10 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.

3.22 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 4 REVIEW 3 FIX
D
Page Weight Budget
Action
2.2 MB transferred, 97 requests
FIX
2.2 MB transferred, 97 requests
Info::
Page weighs 5.7 MB (2.2 MB transferred)
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
97 HTTP requests
Info::
Estimated 0.46 g CO2 per page load
2.2 MB / 2.4 MB budget
2.2 MB transferred
97 requests
0.46 g CO2 per page load
JavaScript 1.3 MiB 57%
Images 619.5 KiB 27%
CSS 133.2 KiB 6%
Fonts 93.5 KiB 4%
HTML 68.2 KiB 3%
Other 46.2 KiB 2%
Other 1.5 KiB 0%
0 2.4 MB 4.9 MB
Approaching limit

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

F
JS Bundles
Action
33 scripts, 743 KB unused
FIX
33 scripts, 743 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://translate.googleapis.com/_/translate_http/...: 94 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://maps.googleapis.com/maps/api/js?client=gme...: 64 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 743 KB
743 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js0 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://translate.googleapis.com/_/translate_http/_/js/k=translate_http.tr.nl.2-2JqXXxIUQ.O/am=AAAAAQ/d=1/exm=el_conf/ed=1/rs=AN8SPfrHoeGWfp9mfKIskQ7twmalRFgNwg/m=el_main119 KB94 KB (79%)✓3rd
https://maps.googleapis.com/maps/api/js?client=gme-cityoftoronto&v=3100 KB64 KB (64%)✓3rd
https://www.toronto.ca/wp-content/themes/cot/js/footer.js?ver=6.8.354 KB30 KB (56%)✗1st
https://www.toronto.ca/resources/event_cal_widget/scripts/main1.0.8.js73 KB23 KB (36%)✓1st
https://www.toronto.ca/wp-content/themes/cot/js/search.js?ver=201707122 KB—✓1st
https://d.oracleinfinity.io/infy/acs/account/97j62divdr/js/main/analytics-production/analytics.js15 KB—✓3rd
https://www.toronto.ca/resources/wp-feedback/scripts/main0.1.0.js37 KB—✓1st

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

F
Page Weight Inventory
Action
97 resources · 2.2 MB · 743 KB savings available
FIX
97 resources · 2.2 MB · 743 KB savings available
Warning::
Page weight 1.2 MB over 1MB target
Got: 2.2 MB Expected: ≤ 1 MB
Info::
~743 KB of savings available
Warning::
24 third-party resources (51% of weight)
Info::
3 resources over 200KB
97 resources · 2.2 MiB · 24 third-party 1.2 MiB over 1MB target
JavaScript 57% · 1.3 MiB
Image 28% · 621.0 KiB
CSS 6% · 133.2 KiB
Document 5% · 110.2 KiB
Font 4% · 93.5 KiB
Other 0% · 4.2 KiB

~742.6 KiB of savings available

Remove unused JavaScript: 742.6 KiB
B
Third-Party Impact
51% third-party, 0 ms blocking
REVIEW
51% third-party, 0 ms blocking
Warning::
Third-party code accounts for 51% of page weight (1.1 MiB of 2.2 MiB)
Info::
Third-party blocking time is low (0 ms)
49%
51%
First-party Third-party
C
Image Optimization
Action
36 images, 0 KB saveable
REVIEW
36 images, 0 KB saveable
Warning::
https://www.toronto.ca/wp-content/themes/cot/img/i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.toronto.ca/wp-content/themes/cot/img/i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.toronto.ca/wp-content/themes/cot/img/i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.toronto.ca/wp-content/themes/cot/img/i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.toronto.ca/wp-content/uploads/2026/01/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.toronto.ca/wp-content/themes/cot/img/i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.toronto.ca/wp-content/uploads/2024/04/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.toronto.ca/wp-content/themes/cot/img/i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.toronto.ca/wp-content/uploads/2024/11/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.toronto.ca/wp-content/themes/cot/img/i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.toronto.ca/wp-content/uploads/2025/04/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
36 images 620 KB
0 oversized -0 KB
36 legacy format
11 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1612ms total JS execution
REVIEW
1612ms total JS execution
Warning::
https://www.toronto.ca/: 448ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 323ms CPU time
Warning::
Unattributable: 307ms CPU time
Warning::
https://www.toronto.ca/wp-content/themes/cot/js/jq...: 303ms CPU time
Info::
https://translate.googleapis.com/_/translate_http/...: 112ms CPU time
Info::
Third-party scripts: 805ms (50% of total)

Main Thread Breakdown

Script Evaluation 45% Other 27% Style & Layout 13% Script Parsing & Compilation 7% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.toronto.ca/448ms2ms1ms1st
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js323ms267ms44ms3rd
Unattributable307ms6ms0ms3rd
https://www.toronto.ca/wp-content/themes/cot/js/jquery-3.6.0.min.js303ms239ms5ms1st
https://translate.googleapis.com/_/translate_http/_/js/k=translate_http.tr.nl.2-2JqXXxIUQ.O/am=AAAAAQ/d=1/exm=el_conf/ed=1/rs=AN8SPfrHoeGWfp9mfKIskQ7twmalRFgNwg/m=el_main112ms73ms30ms3rd
https://maps.googleapis.com/maps/api/js?client=gme-cityoftoronto&v=363ms45ms11ms3rd
https://www.toronto.ca/wp-content/themes/cot/js/footer.js?ver=6.8.356ms39ms7ms1st
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 (93 KB)
PASS
4 fonts (93 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

93 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 500 ms 1.0 s 1.5 s FCP 623 ms LCP 1.4 shttps://www.toronto.ca/wp-content/themes/cot/fonts/roboto-medium-webfont.woff2roboto-medium-webfont.w... https://www.toronto.ca/wp-content/themes/cot/fonts/roboto-medium-webfont.woff2 — 20.1 KiB — 41 ms — font-display: swaphttps://www.toronto.ca/wp-content/themes/cot/fonts/roboto-regular-webfont.woff2roboto-regular-webfont.... https://www.toronto.ca/wp-content/themes/cot/fonts/roboto-regular-webfont.woff2 — 19.6 KiB — 51 ms — font-display: swaphttps://www.toronto.ca/wp-content/themes/cot/fonts/roboto-bold-webfont.woff2roboto-bold-webfont.woff2 https://www.toronto.ca/wp-content/themes/cot/fonts/roboto-bold-webfont.woff2 — 20.0 KiB — 11 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 17 ms — font-display: swap
roboto-medium-webfont.w... woff2 swap
Size 20 KB
Load time 41 ms
Start 538 ms
Risk FOUT — text flashes from fallback to web font
roboto-regular-webfont.... woff2 swap
Size 20 KB
Load time 51 ms
Start 539 ms
Risk FOUT — text flashes from fallback to web font
roboto-bold-webfont.woff2 woff2 swap
Size 20 KB
Load time 11 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 17 ms
Start 1.7 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+
HTTP Caching
max-age=300 (5 minutes)
PASS
max-age=300 (5 minutes)
Info::
Cache-Control header is set
Got: s-maxage=82797, max-age=300
Info::
Effective TTL: 5 minutes (max-age=300)
Info::
CDN TTL: 22 hours (s-maxage=82797)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

s-maxage=82797, max-age=300

DirectiveValueMeaning
s-maxage82797CDN caches for 22 hours
max-age300Cache for 5 minutes
Effective TTL: 300 seconds
Network Waterfall
97 requests over 1989ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 623 ms LCP 1.4 shttps://www.toronto.ca// https://www.toronto.ca/ — 200 — 40.5 KiB — 314 ms — h3https://www.toronto.ca/resources/cdn/cotui/2.4.3/cotui.css?ver=6.8.3/resources/cdn/cotui/2.4.3/cotui.cs... https://www.toronto.ca/resources/cdn/cotui/2.4.3/cotui.css?ver=6.8.3 — 200 — 1.4 KiB — 61 ms — h3https://www.toronto.ca/resources/311_widgets/styles/311_widgets.css?ver=6.8.3/resources/311_widgets/styles/311_w... https://www.toronto.ca/resources/311_widgets/styles/311_widgets.css?ver=6.8.3 — 200 — 1.4 KiB — 62 ms — h3https://www.toronto.ca/wp-includes/css/dist/block-library/style.min.css?ver=6.8.3/wp-includes/css/dist/block-library... https://www.toronto.ca/wp-includes/css/dist/block-library/style.min.css?ver=6.8.3 — 200 — 14.5 KiB — 36 ms — h3https://www.toronto.ca/wp-content/plugins/cot-custom/mediaplayer/dist/ableplayer/build/ableplayer.min.css?ver=6.8.3/wp-content/plugins/cot-custom/medi... https://www.toronto.ca/wp-content/plugins/cot-custom/mediaplayer/dist/ableplayer/build/ableplayer.min.css?ver=6.8.3 — 200 — 4.4 KiB — 28 ms — h3https://www.toronto.ca/wp-content/themes/cot/css/bootstrap.3.4.1.min.css?ver=1776362564/wp-content/themes/cot/css/bootstra... https://www.toronto.ca/wp-content/themes/cot/css/bootstrap.3.4.1.min.css?ver=1776362564 — 200 — 18.2 KiB — 41 ms — h3https://www.toronto.ca/wp-content/themes/cot/assets/fontawesome/css/all.min.css?ver=1776362564/wp-content/themes/cot/assets/fonta... https://www.toronto.ca/wp-content/themes/cot/assets/fontawesome/css/all.min.css?ver=1776362564 — 200 — 22.0 KiB — 33 ms — h3https://www.toronto.ca/wp-content/themes/cot/css/cot.css?ver=1776362564/wp-content/themes/cot/css/cot.css?... https://www.toronto.ca/wp-content/themes/cot/css/cot.css?ver=1776362564 — 200 — 16.9 KiB — 81 ms — h3https://www.toronto.ca/wp-content/themes/cot/assets/js-cookie/dist/js.cookie.min.js?ver=6.8.3/wp-content/themes/cot/assets/js-co... https://www.toronto.ca/wp-content/themes/cot/assets/js-cookie/dist/js.cookie.min.js?ver=6.8.3 — 200 — 1.2 KiB — 76 ms — h3https://www.toronto.ca/resources/cdn/cotui/2.4.3/cotui.esm.js/resources/cdn/cotui/2.4.3/cotui.es... https://www.toronto.ca/resources/cdn/cotui/2.4.3/cotui.esm.js — 200 — 2.1 KiB — 78 ms — h3https://www.toronto.ca/resources/event_cal_widget/styles/main1.0.8.css/resources/event_cal_widget/styles/... https://www.toronto.ca/resources/event_cal_widget/styles/main1.0.8.css — 200 — 2.2 KiB — 60 ms — h3https://www.toronto.ca/resources/wp-feedback/styles/main0.1.0.css/resources/wp-feedback/styles/main0... https://www.toronto.ca/resources/wp-feedback/styles/main0.1.0.css — 200 — 2.2 KiB — 73 ms — h3https://www.toronto.ca/cot/style.css/cot/style.css https://www.toronto.ca/cot/style.css — 200 — 2.4 KiB — 42 ms — h3https://www.toronto.ca/wp-content/themes/cot/img/logo.svg/wp-content/themes/cot/img/logo.svg https://www.toronto.ca/wp-content/themes/cot/img/logo.svg — 200 — 1.2 KiB — 73 ms — h3https://www.toronto.ca/wp-content/themes/cot/img/icon-search.svg/wp-content/themes/cot/img/icon-sea... https://www.toronto.ca/wp-content/themes/cot/img/icon-search.svg — 200 — 732 B — 75 ms — h3https://www.toronto.ca/wp-content/uploads/2026/04/94e4-homeskyline-1500x700.jpg/wp-content/uploads/2026/04/94e4-ho... https://www.toronto.ca/wp-content/uploads/2026/04/94e4-homeskyline-1500x700.jpg — 200 — 157.3 KiB — 17 ms — h3https://www.toronto.ca/wp-content/uploads/2025/04/96c2-CED-homepage-2025-C.jpg/wp-content/uploads/2025/04/96c2-CE... https://www.toronto.ca/wp-content/uploads/2025/04/96c2-CED-homepage-2025-C.jpg — 200 — 24.4 KiB — 13 ms — h3https://www.toronto.ca/wp-content/uploads/2024/11/962d-Homes-in-Fall-Home-Page-Feature-350x250-1.jpg/wp-content/uploads/2024/11/962d-Ho... https://www.toronto.ca/wp-content/uploads/2024/11/962d-Homes-in-Fall-Home-Page-Feature-350x250-1.jpg — 200 — 78.0 KiB — 32 ms — h3https://www.toronto.ca/wp-content/themes/cot/js/jquery-3.6.0.min.js/wp-content/themes/cot/js/jquery-3.... https://www.toronto.ca/wp-content/themes/cot/js/jquery-3.6.0.min.js — 200 — 30.3 KiB — 45 ms — h3https://www.toronto.ca/wp-content/themes/cot/js/jquery-migrate-3.4.0.min.js/wp-content/themes/cot/js/jquery-mi... https://www.toronto.ca/wp-content/themes/cot/js/jquery-migrate-3.4.0.min.js — 200 — 5.1 KiB — 45 ms — h3https://www.toronto.ca/cot/jquery-additional-custom-js.js/cot/jquery-additional-custom-js.js https://www.toronto.ca/cot/jquery-additional-custom-js.js — 200 — 1.9 KiB — 45 ms — h3https://www.toronto.ca/wp-content/themes/cot/js/jquery.ui.autocomplete.1.13.2.min.js?ver=20240201/wp-content/themes/cot/js/jquery.ui... https://www.toronto.ca/wp-content/themes/cot/js/jquery.ui.autocomplete.1.13.2.min.js?ver=20240201 — 200 — 10.0 KiB — 68 ms — h3https://www.toronto.ca/wp-content/themes/cot/js/bootstrap.3.4.1.min.js/wp-content/themes/cot/js/bootstrap... https://www.toronto.ca/wp-content/themes/cot/js/bootstrap.3.4.1.min.js — 200 — 10.8 KiB — 64 ms — h3https://maps.googleapis.com/maps/api/js?client=gme-cityoftoronto&v=3maps.googleapis.com/maps/api/js?cli... https://maps.googleapis.com/maps/api/js?client=gme-cityoftoronto&v=3 — 200 — 100.3 KiB — 148 ms — h2https://www.toronto.ca/resources/event_cal_widget/scripts/main1.0.8.js/resources/event_cal_widget/scripts... https://www.toronto.ca/resources/event_cal_widget/scripts/main1.0.8.js — 200 — 73.2 KiB — 106 ms — h3https://www.toronto.ca/resources/wp-feedback/scripts/main0.1.0.js/resources/wp-feedback/scripts/main... https://www.toronto.ca/resources/wp-feedback/scripts/main0.1.0.js — 200 — 37.1 KiB — 125 ms — h3https://www.google.com/recaptcha/api.js?render=6LeN_XIUAAAAAEd8X21vFtkJ3_c7uA0xpUGcrGpewww.google.com/recaptcha/api.js?ren... https://www.google.com/recaptcha/api.js?render=6LeN_XIUAAAAAEd8X21vFtkJ3_c7uA0xpUGcrGpe — 200 — 1.0 KiB — 65 ms — 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h3https://translate-pa.googleapis.com/v1/supportedLanguages?client=te&display_language=nl&key=AIzaSyBWDj0QJvVIx8XOhRegXX5_SrRWxhT5Hs4&callback=callbacktranslate-pa.googleapis.com/v1/supp... https://translate-pa.googleapis.com/v1/supportedLanguages?client=te&display_language=nl&key=AIzaSyBWDj0QJvVIx8XOhRegXX5_SrRWxhT5Hs4&callback=callback — 200 — 3.3 KiB — 46 ms — h2https://d.oracleinfinity.io/infy/acs/common/js/1.3.53/common.jsd.oracleinfinity.io/infy/acs/common... https://d.oracleinfinity.io/infy/acs/common/js/1.3.53/common.js — 200 — 16.6 KiB — 15 ms — h2https://d.oracleinfinity.io/infy/acs/account/97j62divdr/js/main/analytics-production/analytics.jsd.oracleinfinity.io/infy/acs/accoun... https://d.oracleinfinity.io/infy/acs/account/97j62divdr/js/main/analytics-production/analytics.js — 200 — 15.3 KiB — 16 ms — h2https://dc.oracleinfinity.io/v4/account/97j62divdr/client/iddc.oracleinfinity.io/v4/account/97j... https://dc.oracleinfinity.io/v4/account/97j62divdr/client/id — 200 — 879 B — 60 ms — http/1.1https://www.toronto.ca/scripts/newtorontolinktrack.js/scripts/newtorontolinktrack.js https://www.toronto.ca/scripts/newtorontolinktrack.js — 200 — 4.9 KiB — 9 ms — h3https://dc.oracleinfinity.io/97j62divdr/dcs.gif?dcsdat=1776893780894&dcssip=www.toronto.ca&dcsuri=%2F&wt.tz=0&wt.bh=21&wt.ul=en-US&wt.cd=24&wt.sr=800x600&wt.jo=No&wt.ti=City%20of%20Toronto&wt.js=Yes&wt.bs=1350x940&wt.dl=0&wt.ssl=1&wt.es=www.toronto.ca%2F&wt.wp_app_name=event_cal_widget%3Bwp-feedback&wt.bc_n=Home&wt.z_scroll=yes&wt.sp=CoT&wt.cot_h1=City%20of%20Toronto&wt.page_id=52&wt.dcsid=dcs222clfigsgada5sghv6dw2_9b4q&wt.tv=1.0.4&wt.ce=1&wt.co_f=2b5320d7-47c2-4b3e-b6e0-d8774e5d0a81&wt.vt_f=1&ora.tag_id=main&ora.tag_config=productiondc.oracleinfinity.io/97j62divdr/dcs... https://dc.oracleinfinity.io/97j62divdr/dcs.gif?dcsdat=1776893780894&dcssip=www.toronto.ca&dcsuri=%2F&wt.tz=0&wt.bh=21&wt.ul=en-US&wt.cd=24&wt.sr=800x600&wt.jo=No&wt.ti=City%20of%20Toronto&wt.js=Yes&wt.bs=1350x940&wt.dl=0&wt.ssl=1&wt.es=www.toronto.ca%2F&wt.wp_app_name=event_cal_widget%3Bwp-feedback&wt.bc_n=Home&wt.z_scroll=yes&wt.sp=CoT&wt.cot_h1=City%20of%20Toronto&wt.page_id=52&wt.dcsid=dcs222clfigsgada5sghv6dw2_9b4q&wt.tv=1.0.4&wt.ce=1&wt.co_f=2b5320d7-47c2-4b3e-b6e0-d8774e5d0a81&wt.vt_f=1&ora.tag_id=main&ora.tag_config=production — 200 — 901 B — 18 ms — http/1.1https://www.google.com/recaptcha/api2/webworker.js?hl=en&v=gTpTIWhbKpxADzTzkcabhXN4www.google.com/recaptcha/api2/webwo... https://www.google.com/recaptcha/api2/webworker.js?hl=en&v=gTpTIWhbKpxADzTzkcabhXN4 — 200 — 23 B — 308 ms — h3https://www.gstatic.com/recaptcha/api2/logo_48.pngwww.gstatic.com/recaptcha/api2/logo... https://www.gstatic.com/recaptcha/api2/logo_48.png — 200 — 2.3 KiB — 5 ms — h2https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v48/KFO7... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 33.9 KiB — 17 ms — h3https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 0 B — 18 ms — h2https://www.toronto.ca/wp-content/themes/cot/img/favicon-32x32.png/wp-content/themes/cot/img/favicon-... https://www.toronto.ca/wp-content/themes/cot/img/favicon-32x32.png — 200 — 1.5 KiB — 13 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
50% of JavaScript execution is third-party
First-party Third-party 805ms · 219KB · CA$11/mo
www.gstatic.com
Other
Costly
Execution 323ms
Transfer 0 KB
Unused 49%
Monthly Cost CA$4/mo
Unattributable
Other
Costly
Execution 307ms
Transfer 0 KB
Monthly Cost CA$4/mo
translate.googleapis.com
Other
Optional
Execution 112ms
Transfer 119 KB
Unused 79%
Monthly Cost CA$2/mo
maps.googleapis.com
Other
Optional
Execution 63ms
Transfer 100 KB
Unused 64%
Monthly Cost CA$1/mo

These scripts may cost more than they're worth

  • www.gstatic.com adds 323ms and costs ~CA$4/month
  • Unattributable adds 307ms and costs ~CA$4/month

50% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

www.gstatic.com takes 323ms 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 307ms 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

79% of translate.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

64% of maps.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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