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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
4
REVIEW
2
PASS
9
INFO
2

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

Mobile Desktop
71
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
80
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
80
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.

4.25 s

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

4.32 s

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

228 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.

4.25 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.

4.60 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
9 PASS 2 REVIEW 4 FIX
D
Third-Party Impact
Action
99% third-party, 0 ms blocking
FIX
99% third-party, 0 ms blocking
Warning::
Third-party code accounts for 99% of page weight (523.0 KiB of 526.5 KiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
F
JS Execution Cost
Action
9081ms total JS execution
FIX
9081ms total JS execution
Warning::
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awsw...: 7688ms CPU time
Warning::
Unattributable: 1193ms CPU time
Info::
https://www.seattletimes.com/: 201ms CPU time
Warning::
Third-party scripts: 9081ms (100% of total)

Main Thread Breakdown

Script Evaluation 80% Other 13% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.js7688ms6444ms480ms3rd
Unattributable1193ms638ms0ms3rd
https://www.seattletimes.com/201ms146ms7ms3rd
F
JS Bundles
Action
5 scripts, 1.4 MB unused
FIX
5 scripts, 1.4 MB unused
Warning::
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awsw...: 277 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awsw...: 277 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awsw...: 277 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awsw...: 277 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awsw...: 277 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.4 MB
1384 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.js502 KB277 KB (55%)✓3rd
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.js0 KB277 KB (55%)✓3rd
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.js0 KB277 KB (55%)✓3rd
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.js0 KB277 KB (55%)✓3rd
https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.js0 KB277 KB (55%)✓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

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

D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store, max-age=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store, max-age=0

DirectiveValueMeaning
no-store—Never cache this response
max-age0Cache for 0 seconds
C
Page Weight Inventory
Action
28 resources · 527 KB · 1.4 MB savings available
REVIEW
28 resources · 527 KB · 1.4 MB savings available
Info::
Within 1MB page-weight target
Got: 527 KB
Info::
~1.4 MB of savings available
Warning::
25 third-party resources (99% of weight)
Info::
1 resources over 200KB
28 resources · 526.5 KiB · 25 third-party Within 1MB page-weight target
JavaScript 96% · 503.0 KiB
Document 3% · 16.4 KiB
Other 1% · 7.2 KiB

~1.4 MiB of savings available

Remove unused JavaScript: 1.4 MiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
527 KB transferred, 28 requests
PASS
527 KB transferred, 28 requests
Info::
Page weighs 6.6 MB (527 KB transferred)
Warning::
JavaScript is 503 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 503 KB
Info::
28 HTTP requests
Info::
Estimated 0.11 g CO2 per page load
527 KB / 2.4 MB budget
527 KB transferred
28 requests
0.11 g CO2 per page load
JavaScript 503.0 KiB 96%
HTML 13.9 KiB 3%
Other 7.2 KiB 1%
Other 2.5 KiB 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

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+
Image Optimization
No images on this page
PASS
No images on this page
Info::
No images on this page
0 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
28 requests over 3431ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 4.2 s LCP 4.3 shttps://seattletimes.com// https://seattletimes.com/ — 202 — 2.8 KiB — 15 ms — h2https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.jsd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.js — 200 — 501.5 KiB — 350 ms — h2https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/inputs?client=browserd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/inputs?client=browser — 200 — 827 B — 125 ms — h3https://seattletimes.com/favicon.ico/favicon.ico https://seattletimes.com/favicon.ico — 202 — 447 B — 4 ms — h2https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verifyd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verify — 200 — 635 B — 220 ms — h3https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verifyd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verify — 200 — 635 B — 132 ms — h3https://seattletimes.com// https://seattletimes.com/ — 301 — 289 B — 605 ms — h2https://www.seattletimes.com/www.seattletimes.com/ https://www.seattletimes.com/ — 202 — 2.8 KiB — 32 ms — h2https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.jsd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.js — 200 — 402 B — 115 ms — h2https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/inputs?client=browserd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/inputs?client=browser — 200 — 828 B — 44 ms — h3https://www.seattletimes.com/favicon.icowww.seattletimes.com/favicon.ico https://www.seattletimes.com/favicon.ico — 202 — 447 B — 6 ms — h2https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verifyd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verify — 200 — 852 B — 101 ms — h3https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verifyd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verify — 200 — 635 B — 141 ms — h3https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verifyd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verify — -1 — 0 B — 18 ms — https://www.seattletimes.com/www.seattletimes.com/ https://www.seattletimes.com/ — 202 — 2.8 KiB — 5 ms — h2https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/reportd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/report — -1 — 0 B — 0 ms — https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.jsd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.js — 304 — 362 B — 116 ms — h3https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/inputs?client=browserd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/inputs?client=browser — 200 — 828 B — 48 ms — h3https://www.seattletimes.com/favicon.icowww.seattletimes.com/favicon.ico https://www.seattletimes.com/favicon.ico — 202 — 446 B — 5 ms — h2https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verifyd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verify — 200 — 634 B — 133 ms — h3https://www.seattletimes.com/www.seattletimes.com/ https://www.seattletimes.com/ — 202 — 2.8 KiB — 4 ms — h2https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.jsd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.js — 304 — 362 B — 117 ms — h3https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/inputs?client=browserd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/inputs?client=browser — 200 — 828 B — 111 ms — h3https://www.seattletimes.com/favicon.icowww.seattletimes.com/favicon.ico https://www.seattletimes.com/favicon.ico — 202 — 446 B — 4 ms — h2https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verifyd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/mp_verify — 200 — 635 B — 222 ms — h3https://www.seattletimes.com/www.seattletimes.com/ https://www.seattletimes.com/ — 202 — 2.8 KiB — 5 ms — h2https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.jsd97cdb3de0b0.a62927d9.eu-west-1.tok... https://d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com/d97cdb3de0b0/e7e948eaa823/7b5e1d1d3320/challenge.js — 304 — 362 B — 46 ms — h3https://www.seattletimes.com/favicon.icowww.seattletimes.com/favicon.ico https://www.seattletimes.com/favicon.ico — 202 — 448 B — 4 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 9081ms · 3KB · $121/mo
d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com
Other
Costly
Execution 7688ms
Transfer 0 KB
Unused 55%
Monthly Cost $102/mo
Unattributable
Other
Costly
Execution 1193ms
Transfer 0 KB
Monthly Cost $16/mo
www.seattletimes.com
Other
Costly
Execution 201ms
Transfer 3 KB
Monthly Cost $3/mo

These scripts may cost more than they're worth

  • d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com adds 7688ms and costs ~$102/month
  • Unattributable adds 1193ms and costs ~$16/month
  • www.seattletimes.com adds 201ms and costs ~$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

d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.com takes 7688ms 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

55% of d97cdb3de0b0.a62927d9.eu-west-1.token.awswaf.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

Unattributable takes 1193ms 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

www.seattletimes.com takes 201ms 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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