Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
7.91 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
15.61 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
532 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
7.91 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.
16.12 s
Page Load Progression
DPage Weight BudgetAction2.2 MB transferred, 90 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
FJS Execution CostAction5903ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 1424ms | 1159ms | 142ms | 3rd |
| https://www.toronto.ca/ | 1189ms | 9ms | 5ms | 1st |
| Unattributable | 824ms | 17ms | 0ms | 3rd |
| https://www.toronto.ca/wp-content/themes/cot/js/jquery-3.6.0.min.js | 810ms | 587ms | 17ms | 1st |
| https://www.toronto.ca/wp-content/themes/cot/js/footer.js?ver=6.8.3 | 404ms | 212ms | 30ms | 1st |
| 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_main | 338ms | 259ms | 64ms | 3rd |
| https://maps.googleapis.com/maps/api/js?client=gme-cityoftoronto&v=3 | 255ms | 171ms | 60ms | 3rd |
| https://www.toronto.ca/resources/event_cal_widget/scripts/main1.0.8.js | 164ms | 117ms | 47ms | 1st |
| https://www.toronto.ca/resources/wp-feedback/scripts/main0.1.0.js | 157ms | 134ms | 21ms | 1st |
| https://c.oracleinfinity.io/acs/account/97j62divdr/js/main/odc.js?_ora.context=analytics:production | 125ms | 103ms | 7ms | 3rd |
Showing top 10 of 13 scripts
FJS BundlesAction33 scripts, 740 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 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_main | 119 KB | 94 KB (79%) | ✓ | 3rd |
| https://maps.googleapis.com/maps/api/js?client=gme-cityoftoronto&v=3 | 100 KB | 63 KB (63%) | ✓ | 3rd |
| https://www.toronto.ca/wp-content/themes/cot/js/footer.js?ver=6.8.3 | 54 KB | 30 KB (55%) | ✗ | 1st |
| https://www.toronto.ca/resources/event_cal_widget/scripts/main1.0.8.js | 73 KB | 23 KB (36%) | ✓ | 1st |
| https://www.toronto.ca/wp-content/themes/cot/js/navigation.js?ver=20151215 | 1 KB | — | ✓ | 1st |
| https://d.oracleinfinity.io/infy/acs/account/97j62divdr/js/main/analytics-production/analytics.js | 15 KB | — | ✓ | 3rd |
| https://www.toronto.ca/resources/wp-feedback/scripts/main0.1.0.js | 37 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction90 resources · 2.2 MB · 740 KB savings availableFIX
~740.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 90 resources | 2.2 MiB | ||||||
BThird-Party Impact51% third-party, 0 ms blockingREVIEW
CImage OptimizationAction29 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (93 KB)PASS
Web fonts
4
93 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints1 hints, 0 missing preconnectsPASS
Current Resource Hints
1 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+HTTP Cachingmax-age=300 (5 minutes)PASS
s-maxage=82797, max-age=300
| Directive | Value | Meaning |
|---|---|---|
| s-maxage | 82797 | CDN caches for 22 hours |
| max-age | 300 | Cache for 5 minutes |
Network Waterfall90 requests over 1741msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.gstatic.com www.gstatic.com | Other | 1424ms | 0 KB | 49% | CA$20/mo | Costly |
Unattributable Unattributable | Other | 824ms | 0 KB | — | CA$11/mo | Costly |
translate.googleapis.com translate.googleapis.com | Other | 338ms | 119 KB | 79% | CA$5/mo | Costly |
maps.googleapis.com maps.googleapis.com | Other | 255ms | 100 KB | 63% | CA$4/mo | Costly |
c.oracleinfinity.io c.oracleinfinity.io | Other | 125ms | 14 KB | — | CA$2/mo | Optional |
d.oracleinfinity.io d.oracleinfinity.io | Other | 109ms | 15 KB | — | CA$2/mo | Optional |
translate.google.com translate.google.com | Other | 52ms | 28 KB | — | CA$1/mo | Optional |
These scripts may cost more than they're worth
- www.gstatic.com adds 1424ms and costs ~CA$20/month
- Unattributable adds 824ms and costs ~CA$11/month
- translate.googleapis.com adds 338ms and costs ~CA$5/month
- maps.googleapis.com adds 255ms and costs ~CA$4/month
53% of JavaScript execution time comes from third-party scripts.
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 1424ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 824ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
translate.googleapis.com takes 338ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
maps.googleapis.com takes 255ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
63% of maps.googleapis.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev