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https://www.perplexity.ai

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
91
GRADE
A
FIX
2
REVIEW
1
PASS
11
INFO
2

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

Mobile Desktop
83
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
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.
50
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.

971 ms

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

1.93 s

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

649 ms

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

0.002

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

1.34 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.

3.39 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
16
11 PASS 1 REVIEW 2 FIX
D
Third-Party Impact
Action
80% third-party, 0 ms blocking
FIX
80% third-party, 0 ms blocking
Warning::
Third-party code accounts for 80% of page weight (372.7 KiB of 466.3 KiB)
Info::
Third-party blocking time is low (0 ms)
20%
80%
First-party Third-party
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-cache, no-store
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache, no-store

DirectiveValueMeaning
no-cache—Cache but always revalidate first
no-store—Never cache this response
C
JS Execution Cost
Action
1283ms total JS execution
REVIEW
1283ms total JS execution
Warning::
https://www.perplexity.ai/cdn-cgi/challenge-platfo...: 1047ms CPU time
Info::
Unattributable: 141ms CPU time
Info::
https://www.perplexity.ai/: 95ms CPU time
Info::
Third-party scripts: 141ms (11% of total)

Main Thread Breakdown

Script Evaluation 79% Other 13%
ScriptTotalScriptingParse/CompileParty
https://www.perplexity.ai/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9e8bd1763f606fe11047ms1003ms15ms1st
Unattributable141ms5ms0ms3rd
https://www.perplexity.ai/95ms9ms3ms1st
A+
Page Weight Budget
466 KB transferred, 18 requests
PASS
466 KB transferred, 18 requests
Info::
Page weighs 916 KB (466 KB transferred)
Info::
18 HTTP requests
Info::
Estimated 0.10 g CO2 per page load
466 KB / 2.4 MB budget
466 KB transferred
18 requests
0.10 g CO2 per page load
Other 263.3 KiB 56%
HTML 102.2 KiB 22%
JavaScript 95.7 KiB 21%
Images 5.0 KiB 1%
Other 67 B 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 5 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
8 scripts, 0 KB unused
PASS
8 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c12417176891760157 KB—✓3rd
https://www.perplexity.ai/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9e8bd1763f606fe171 KB—✓1st
blob:https://www.perplexity.ai/d5f4286c-0e2a-4e5d-ba0a-cb3c8adf2d8e0 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/b/625261456364/api.js?onload=OBvX9&render=explicit17 KB—✓3rd
blob:https://www.perplexity.ai/1ef16ad2-dd4f-4491-a9d0-6580008e3bb5-0 KB—✓3rd
blob:https://challenges.cloudflare.com/94aae1b3-849e-435b-894e-1e49873247a60 KB—✓3rd
blob:https://challenges.cloudflare.com/c7f22f03-5353-400c-96ce-2b8ea0ac994e-0 KB—✓3rd
blob:https://challenges.cloudflare.com/c7f22f03-5353-400c-96ce-2b8ea0ac994e-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+
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
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

Network Waterfall
18 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
11% of JavaScript execution is third-party
First-party Third-party 141ms · 0KB · $2/mo
Unattributable
Other
Optional
Execution 141ms
Transfer 0 KB
Monthly Cost $2/mo

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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