Performance
· 15 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.
1.25 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.50 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
6 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.167
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.40 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.
2.21 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction84 resources · 1.6 MB · 250 KB savings availableFIX
~249.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 84 resources | 1.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.6 MB transferred, 84 requestsREVIEW
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
BImage Optimization42 images, 0 KB saveableREVIEW
BJS Execution Cost831ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.latimes.com/ | 248ms | 7ms | 2ms | 3rd |
| https://activate.platform.californiatimes.com/caltimes/latimes/Bootstrap.js | 243ms | 218ms | 7ms | 3rd |
| Unattributable | 136ms | 3ms | 0ms | 3rd |
| https://ca-times.brightspotcdn.com/resource/0000016e-6bb5-d505-abef-fbb7e4420000/styleguide/Core.min.e930c837cb013d6a7bc26ce01b284470.gz.js | 130ms | 63ms | 3ms | 3rd |
| https://www.latimes.com/styleguide/8250-d5c05034.bundle.js | 74ms | 45ms | 20ms | 3rd |
CJS BundlesAction25 scripts, 250 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.latimes.com/styleguide/8250-d5c05034.bundle.js | 218 KB | 165 KB (76%) | ✓ | 3rd |
| https://activate.platform.californiatimes.com/caltimes/latimes/Bootstrap.js | 87 KB | 48 KB (56%) | ✓ | 3rd |
| https://ca-times.brightspotcdn.com/resource/0000016e-6bb5-d505-abef-fbb7e4420000/styleguide/Core.min.e930c837cb013d6a7bc26ce01b284470.gz.js | 51 KB | 36 KB (71%) | ✓ | 3rd |
| https://activate.platform.californiatimes.com/caltimes/latimes/code/eb4ccd6a8c8f3a0cd5c43cd28e981343.js?conditionId0=4853386 | 1 KB | — | ✓ | 3rd |
| https://activate.platform.californiatimes.com/caltimes/latimes/code/1c54541579631c10013615d3fa445c34.js?conditionId0=4853390&conditionId1=4853391 | 1 KB | — | ✓ | 3rd |
| https://activate.platform.californiatimes.com/caltimes/latimes/code/25071cf7a5575dcc9563c2de75955ff2.js?conditionId0=4849544 | 11 KB | — | ✓ | 3rd |
| https://activate.platform.californiatimes.com/caltimes/latimes/code/03b33a4cf60d2472bc956ebd57bd6556.js?conditionId0=4849974 | 3 KB | — | ✓ | 3rd |
| https://activate.platform.californiatimes.com/caltimes/latimes/code/d5bf510d58d0bdcfbba2dbc8d1d85267.js?conditionId0=4853386 | 1 KB | — | ✓ | 3rd |
| https://activate.platform.californiatimes.com/caltimes/latimes/code/40bbbe93565cebd84e7c927bb40e2aa0.js?conditionId0=4853389&conditionId1=4863749 | 1 KB | — | ✓ | 3rd |
| https://activate.platform.californiatimes.com/caltimes/latimes/code/2dd3415265e9e427b9265f28d23a32c5.js?conditionId0=4853390&conditionId1=4853391 | 1 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
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 Loading9 fonts (254 KB)PASS
Web fonts
9
254 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~2 KB and ~4 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall84 requests over 3304msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.latimes.com www.latimes.com | Other | 248ms | 162 KB | — | $3/mo | Costly |
activate.platform.californiatimes.com activate.platform.californiatimes.com | Other | 243ms | 87 KB | 56% | $3/mo | Costly |
Unattributable Unattributable | Other | 136ms | 0 KB | — | $2/mo | Optional |
ca-times.brightspotcdn.com ca-times.brightspotcdn.com | Other | 130ms | 51 KB | 71% | $2/mo | Optional |
www.latimes.com www.latimes.com | Other | 74ms | 218 KB | 76% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.latimes.com adds 248ms and costs ~$3/month
- activate.platform.californiatimes.com adds 243ms and costs ~$3/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.latimes.com takes 248ms 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
activate.platform.californiatimes.com takes 243ms 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
56% of activate.platform.californiatimes.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
71% of ca-times.brightspotcdn.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
76% of www.latimes.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