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https://dictionary.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
1
REVIEW
1
PASS
11
INFO
2

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

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
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.
40
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.

470 ms

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

1.00 s

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

64 ms

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

0.001

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

561 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.18 s

Page Load Progression

492 ms
985 ms
1.5 s
2.0 s
2.5 s
3.0 s
3.4 s
3.9 s
Checks
15
11 PASS 1 REVIEW 1 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (498.1 KiB of 498.5 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
B
JS Execution Cost
711ms total JS execution
REVIEW
711ms total JS execution
Warning::
https://www.dictionary.com/cdn-cgi/challenge-platf...: 641ms CPU time
Info::
Unattributable: 70ms CPU time
Warning::
Third-party scripts: 711ms (100% of total)

Main Thread Breakdown

Script Evaluation 84% Other 10%
ScriptTotalScriptingParse/CompileParty
https://www.dictionary.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9efee8f88a42afdd641ms621ms6ms3rd
Unattributable70ms4ms0ms3rd
A+
Page Weight Budget
498 KB transferred, 23 requests
PASS
498 KB transferred, 23 requests
Info::
Page weighs 929 KB (498 KB transferred)
Info::
23 HTTP requests
Info::
Estimated 0.10 g CO2 per page load
498 KB / 2.4 MB budget
498 KB transferred
23 requests
0.10 g CO2 per page load
Other 286.8 KiB 58%
HTML 99.2 KiB 20%
JavaScript 93.4 KiB 19%
Images 10.6 KiB 2%
Other 6.8 KiB 1%
Other 1.7 KiB 0%
0 2.4 MB 4.9 MB
Under budget
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
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 11 KB
0 oversized -0 KB
3 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+
JS Bundles
9 scripts, 0 KB unused
PASS
9 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.dictionary.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9efee8f88a42afdd69 KB—✓3rd
https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c12417176891760157 KB—✓3rd
blob:https://www.dictionary.com/2e87edf7-70bf-4def-9a3e-49dfa3101a670 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit17 KB—✓3rd
blob:https://www.dictionary.com/854b512b-6a87-437a-810d-0cd11fbbdc10-0 KB—✓3rd
blob:https://challenges.cloudflare.com/a5bb09bb-3602-4e39-bf3d-c2a5b91cc26e0 KB—✓3rd
blob:https://challenges.cloudflare.com/934d4ea2-f15e-4dc4-a3a8-38cf3c53fd8b-0 KB—✓3rd
blob:https://challenges.cloudflare.com/934d4ea2-f15e-4dc4-a3a8-38cf3c53fd8b-0 KB—✓3rd
blob:https://challenges.cloudflare.com/fdbaa6e8-cabd-4455-8ebc-3a529620c801-0 KB—✓3rd
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
Page Weight Inventory
23 resources · 498 KB · 0 KB savings available
PASS
23 resources · 498 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 498 KB
Warning::
21 third-party resources (100% of weight)
Info::
1 resources over 200KB
23 resources · 498.5 KiB · 21 third-party Within 1MB page-weight target
Other 58% · 288.5 KiB
Document 21% · 105.9 KiB
JavaScript 19% · 93.4 KiB
Image 2% · 10.6 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

A
HTTP Caching
max-age=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: max-age=3600
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=3600

DirectiveValueMeaning
max-age3600Cache for 1 hour
Effective TTL: 3600 seconds
Network Waterfall
23 requests over 3525ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 470 ms LCP 1.0 shttps://dictionary.com// https://dictionary.com/ — 301 — 408 B — 112 ms — h2https://www.dictionary.com/www.dictionary.com/ https://www.dictionary.com/ — 307 — 64 B — 24 ms — http/1.1https://dictionary.com// https://dictionary.com/ — 301 — 0 B — 1 ms — h2https://www.dictionary.com/www.dictionary.com/ https://www.dictionary.com/ — 403 — 5.8 KiB — 9 ms — h2https://www.dictionary.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9efee8f88a42afddwww.dictionary.com/cdn-cgi/challeng... https://www.dictionary.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9efee8f88a42afdd — 200 — 69.2 KiB — 17 ms — h2https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015 — 200 — 6.9 KiB — 21 ms — h2blob:https://www.dictionary.com/2e87edf7-70bf-4def-9a3e-49dfa3101a67www.dictionary.com/2e87edf7-70bf-4d... blob:https://www.dictionary.com/2e87edf7-70bf-4def-9a3e-49dfa3101a67 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicitchallenges.cloudflare.com/turnstile... https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit — 200 — 17.4 KiB — 23 ms — h3https://www.dictionary.com/favicon.icowww.dictionary.com/favicon.ico https://www.dictionary.com/favicon.ico — 403 — 7.9 KiB — 10 ms — h2https://www.dictionary.com/cdn-cgi/rum?www.dictionary.com/cdn-cgi/rum? https://www.dictionary.com/cdn-cgi/rum? — 204 — 150 B — 9 ms — h2https://www.dictionary.com/favicon.icowww.dictionary.com/favicon.ico https://www.dictionary.com/favicon.ico — 403 — 6.3 KiB — 16 ms — h2https://www.dictionary.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2861708471:1776798608:ErqmkTBsxeuPEUEQ-nj3Qg5gifcpzcridMS7hc7f-HQ/9efee8f88a42afdd/7v5.DT8JxjocaUCpQSEPC2IrzdJsRUUUi2Ro9Vvvj1k-1776800946-1.2.1.1-WK.m8Iif78k2W8buVO6fgndttBIgaE6l6EI.Klo4tsa0ZN4asGVGX0d0M1m0xSvYwww.dictionary.com/cdn-cgi/challeng... https://www.dictionary.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2861708471:1776798608:ErqmkTBsxeuPEUEQ-nj3Qg5gifcpzcridMS7hc7f-HQ/9efee8f88a42afdd/7v5.DT8JxjocaUCpQSEPC2IrzdJsRUUUi2Ro9Vvvj1k-1776800946-1.2.1.1-WK.m8Iif78k2W8buVO6fgndttBIgaE6l6EI.Klo4tsa0ZN4asGVGX0d0M1m0xSvY — 200 — 13.5 KiB — 22 ms — h2blob:https://www.dictionary.com/854b512b-6a87-437a-810d-0cd11fbbdc10www.dictionary.com/854b512b-6a87-43... blob:https://www.dictionary.com/854b512b-6a87-437a-810d-0cd11fbbdc10 — 200 — -1 B — 65 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/k7ska/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=autochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/k7ska/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=auto — 200 — 93.4 KiB — 27 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1 — 200 — 208 B — 6 ms — h3blob:https://challenges.cloudflare.com/a5bb09bb-3602-4e39-bf3d-c2a5b91cc26echallenges.cloudflare.com/a5bb09bb-... blob:https://challenges.cloudflare.com/a5bb09bb-3602-4e39-bf3d-c2a5b91cc26e — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/1903685616:1776798609:2mBkH0c1QanQ_dZT3befYwdTaacqrcigMbTTBv3MVeo/9efee8faf868fd3d/odHHmECbKM7NSFNrzT7LIQaC7tZQjJFWEKAPbL_F6HU-1776800946-1.2.1.1-xVEgRMqyBwKcH0HALFmLmJQJFdjFpxWEvaBiHrkRjqYSNJoEWHQRXWCkGOz4iFovchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/1903685616:1776798609:2mBkH0c1QanQ_dZT3befYwdTaacqrcigMbTTBv3MVeo/9efee8faf868fd3d/odHHmECbKM7NSFNrzT7LIQaC7tZQjJFWEKAPbL_F6HU-1776800946-1.2.1.1-xVEgRMqyBwKcH0HALFmLmJQJFdjFpxWEvaBiHrkRjqYSNJoEWHQRXWCkGOz4iFov — 200 — 250.3 KiB — 104 ms — h3blob:https://challenges.cloudflare.com/934d4ea2-f15e-4dc4-a3a8-38cf3c53fd8bchallenges.cloudflare.com/934d4ea2-... blob:https://challenges.cloudflare.com/934d4ea2-f15e-4dc4-a3a8-38cf3c53fd8b — 200 — -1 B — 108 ms — blobblob:https://challenges.cloudflare.com/934d4ea2-f15e-4dc4-a3a8-38cf3c53fd8bchallenges.cloudflare.com/934d4ea2-... blob:https://challenges.cloudflare.com/934d4ea2-f15e-4dc4-a3a8-38cf3c53fd8b — 200 — -1 B — 51 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9efee8faf868fd3d/1776800946744/R2WlfFeUq3mkkfichallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9efee8faf868fd3d/1776800946744/R2WlfFeUq3mkkfi — 200 — 2.5 KiB — 7 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9efee8faf868fd3d/1776800946744/636184cc82eb2b6fbceb0d3f65c586f49dd31d62a07b757d34abcecf5c151f52/uvqy-6zqdzEJsY6challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9efee8faf868fd3d/1776800946744/636184cc82eb2b6fbceb0d3f65c586f49dd31d62a07b757d34abcecf5c151f52/uvqy-6zqdzEJsY6 — 401 — 1.7 KiB — 6 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/1903685616:1776798609:2mBkH0c1QanQ_dZT3befYwdTaacqrcigMbTTBv3MVeo/9efee8faf868fd3d/odHHmECbKM7NSFNrzT7LIQaC7tZQjJFWEKAPbL_F6HU-1776800946-1.2.1.1-xVEgRMqyBwKcH0HALFmLmJQJFdjFpxWEvaBiHrkRjqYSNJoEWHQRXWCkGOz4iFovchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/1903685616:1776798609:2mBkH0c1QanQ_dZT3befYwdTaacqrcigMbTTBv3MVeo/9efee8faf868fd3d/odHHmECbKM7NSFNrzT7LIQaC7tZQjJFWEKAPbL_F6HU-1776800946-1.2.1.1-xVEgRMqyBwKcH0HALFmLmJQJFdjFpxWEvaBiHrkRjqYSNJoEWHQRXWCkGOz4iFov — 200 — 22.8 KiB — 27 ms — h3blob:https://challenges.cloudflare.com/fdbaa6e8-cabd-4455-8ebc-3a529620c801challenges.cloudflare.com/fdbaa6e8-... blob:https://challenges.cloudflare.com/fdbaa6e8-cabd-4455-8ebc-3a529620c801 — 200 — -1 B — 25 ms — blob
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 711ms · 69KB · $9/mo
www.dictionary.com
Other
Costly
Execution 641ms
Transfer 69 KB
Monthly Cost $8/mo
Unattributable
Other
Optional
Execution 70ms
Transfer 0 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.dictionary.com adds 641ms and costs ~$8/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

www.dictionary.com takes 641ms 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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