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.
1.89 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
6.22 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.23 s
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.
4.63 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.
16.21 s
Page Load Progression
DPage Weight BudgetAction2.5 MB transferred, 110 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction9377ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.trulia.com/YO6YjwLb/init.js | 2691ms | 1362ms | 23ms | 3rd |
| https://www.trulia.com/assets/static/prod/19065da4/_next/static/chunks/framework-40461e51349ca8e7.js | 1879ms | 1630ms | 24ms | 3rd |
| Unattributable | 1193ms | 29ms | 0ms | 3rd |
| https://www.trulia.com/assets/static/prod/19065da4/_next/static/chunks/pages/home-387affc97a703b03.js | 1054ms | 970ms | 7ms | 3rd |
| https://www.trulia.com/ | 867ms | 123ms | 2ms | 3rd |
| https://www.trulia.com/assets/static/prod/19065da4/_next/static/chunks/pages/_app-c17fe2db0fa299b0.js | 574ms | 376ms | 192ms | 3rd |
| https://js.zg-api.com/a/z/js/v1/analytics.js | 155ms | 124ms | 26ms | 3rd |
| https://www.trulia.com/assets/static/prod/19065da4/_next/static/chunks/app-banner.dea73281e3f9acea.js | 139ms | 96ms | 11ms | 3rd |
| https://api.consentjs.datagrail.io/consent/7e84c9ce-057e-4c91-87ef-56e6d4914637/e7cb7d2e-15b9-4c64-a4d3-d9bb9f975ea3/consent.js | 130ms | 108ms | 14ms | 3rd |
| https://sb.scorecardresearch.com/cs/6036206/beacon.js | 129ms | 87ms | 3ms | 3rd |
Showing top 10 of 16 scripts
DJS BundlesAction39 scripts, 381 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.trulia.com/assets/static/prod/19065da4/_next/static/chunks/pages/_app-c17fe2db0fa299b0.js | 425 KB | 210 KB (50%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 96 KB | 71 KB (75%) | ✓ | 3rd |
| https://ats-wrapper.privacymanager.io/ats-modules/a462c6fb-86a6-4ff1-baae-371ec0bea16a/ats.js | 75 KB | 39 KB (53%) | ✓ | 3rd |
| https://js.zg-api.com/a/z/js/v1/analytics.js | 58 KB | 35 KB (60%) | ✓ | 3rd |
| https://www.trulia.com/YO6YjwLb/init.js | 87 KB | 26 KB (30%) | ✓ | 3rd |
| https://www.trulia.com/assets/static/prod/19065da4/_next/static/chunks/7803-c9fc21c440643075.js | 6 KB | — | ✓ | 3rd |
| https://app.link/_r?sdk=web2.85.0&branch_key=key_live_pkrocc5yGCN4njTWV2CmGlapwtfdRBt8&callback=branch_callback__0 | 1 KB | — | ✓ | 3rd |
| https://www.trulia.com/assets/static/prod/19065da4/_next/static/chunks/8732-dd305ae4863101bb.js | 10 KB | — | ✓ | 3rd |
| https://www.trulia.com/assets/static/prod/19065da4/_next/static/chunks/8872-9c7801db07524103.js | 4 KB | — | ✓ | 3rd |
| https://assets.adobedtm.com/launch-EN6a2a075351da41849d53019821066484.min.js | 34 KB | — | ✓ | 3rd |
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
DPage Weight InventoryAction110 resources · 2.5 MB · 381 KB savings availableFIX
~381.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 110 resources | 2.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization43 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
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 Loading1 fonts (20 KB)PASS
Web fonts
1
20 KB total
Render-blocking
0
of 1
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 HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall110 requests over 36494msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.trulia.com www.trulia.com | Other | 2691ms | 87 KB | 30% | $36/mo | Costly |
www.trulia.com www.trulia.com | Other | 1879ms | 43 KB | — | $25/mo | Costly |
Unattributable Unattributable | Other | 1193ms | 0 KB | — | $16/mo | Costly |
www.trulia.com www.trulia.com | Other | 1054ms | 15 KB | — | $14/mo | Costly |
www.trulia.com www.trulia.com | Other | 867ms | 34 KB | — | $12/mo | Costly |
www.trulia.com www.trulia.com | Other | 574ms | 425 KB | 50% | $8/mo | Costly |
js.zg-api.com js.zg-api.com | Other | 155ms | 58 KB | 60% | $2/mo | Optional |
www.trulia.com www.trulia.com | Other | 139ms | 22 KB | — | $2/mo | Optional |
api.consentjs.datagrail.io api.consentjs.datagrail.io | Other | 130ms | 33 KB | — | $2/mo | Optional |
sb.scorecardresearch.com sb.scorecardresearch.com | Other | 129ms | 0 KB | — | $2/mo | Optional |
assets.adobedtm.com assets.adobedtm.com | Other | 125ms | 34 KB | — | $2/mo | Optional |
ats-wrapper.privacymanager.io ats-wrapper.privacymanager.io | Other | 113ms | 75 KB | 53% | $2/mo | Optional |
assets.adobedtm.com assets.adobedtm.com | Other | 96ms | 14 KB | — | $1/mo | Optional |
launchpad-beta.privacymanager.io launchpad-beta.privacymanager.io | Other | 95ms | 41 KB | — | $1/mo | Optional |
www.trulia.com www.trulia.com | Other | 82ms | 35 KB | — | $1/mo | Optional |
accounts.google.com accounts.google.com | Other | 56ms | 96 KB | 75% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.trulia.com adds 2691ms and costs ~$36/month
- www.trulia.com adds 1879ms and costs ~$25/month
- Unattributable adds 1193ms and costs ~$16/month
- www.trulia.com adds 1054ms and costs ~$14/month
- www.trulia.com adds 867ms and costs ~$12/month
- www.trulia.com adds 574ms and costs ~$8/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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.trulia.com takes 2691ms 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
www.trulia.com takes 1879ms 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 1193ms 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
www.trulia.com takes 1054ms 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
www.trulia.com takes 867ms 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
www.trulia.com takes 574ms 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
60% of js.zg-api.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
53% of ats-wrapper.privacymanager.io'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
75% of accounts.google.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