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https://benefit-estimator.netlify.app

Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
1
REVIEW
5
PASS
17
INFO
2

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

Mobile Desktop
90
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
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.
100
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.

2.81 s

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

2.81 s

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

0 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.

3.28 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.

2.81 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
25
17 PASS 5 REVIEW 1 FIX
D
Third-Party Impact
Action
79% third-party, 0 ms blocking
FIX
79% third-party, 0 ms blocking
Warning::
Third-party code accounts for 79% of page weight (54.8 KiB of 69.1 KiB)
Info::
Third-party blocking time is low (0 ms)
21%
79%
First-party Third-party
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
public,max-age=0,must-revalidate
REVIEW
public,max-age=0,must-revalidate
Info::
Cache-Control header is set
Got: public,max-age=0,must-revalidate
Info::
ETag present — enables conditional (304) responses
Cache-Control

public,max-age=0,must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
A+
Page Weight Budget
69 KB transferred, 5 requests
PASS
69 KB transferred, 5 requests
Info::
Page weighs 131 KB (69 KB transferred)
Info::
5 HTTP requests
Info::
Estimated 0.01 g CO2 per page load
69 KB / 2.4 MB budget
69 KB transferred
5 requests
0.01 g CO2 per page load
Fonts 53.9 KiB 78%
HTML 12.9 KiB 19%
Other 1.3 KiB 2%
CSS 912 B 1%
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
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+
JS Execution Cost
315ms total JS execution
PASS
315ms total JS execution
Info::
https://benefit-estimator.netlify.app/: 227ms CPU time
Info::
Unattributable: 87ms CPU time
Info::
Third-party scripts: 87ms (28% of total)

Main Thread Breakdown

Style & Layout 42% Other 35% Script Evaluation 13% Parse HTML & CSS 5% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://benefit-estimator.netlify.app/227ms34ms7ms1st
Unattributable87ms5ms0ms3rd
A+
Font Loading
2 fonts (54 KB)
PASS
2 fonts (54 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

54 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.8 s LCP 2.8 shttps://fonts.gstatic.com/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu0-K6z9mXg.woff2rP2Yp2ywxg089UriI5-g4vl... https://fonts.gstatic.com/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu0-K6z9mXg.woff2 — 36.1 KiB — 107 ms — font-display: swaphttps://fonts.gstatic.com/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu6-K6z9mXgjU0.woff2rP2Yp2ywxg089UriI5-g4vl... https://fonts.gstatic.com/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu6-K6z9mXgjU0.woff2 — 17.8 KiB — 97 ms — font-display: swap
rP2Yp2ywxg089UriI5-g4vl... woff2 swap
Size 36 KB
Load time 107 ms
Start 589 ms
Risk FOUT — text flashes from fallback to web font
rP2Yp2ywxg089UriI5-g4vl... woff2 swap
Size 18 KB
Load time 97 ms
Start 589 ms
Risk FOUT — text flashes from fallback to web font
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+
JS Bundles
No JavaScript
PASS
No JavaScript
Info::
No JavaScript bundles
No JavaScript files loaded.
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+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public,max-age=0,must-revalidate
A+
Server Response Intelligence
3 server-response signal(s) detected
PASS
3 server-response signal(s) detected
Info::
`Cache-Status` header present (RFC 9211): "Netlify Edge"; fwd=stale
The page returns a `Cache-Status` header -- the standardized way for CDNs and caches to communicate per-hop cache state to debugging tools. Format: `Cache-Status: cdn-name; hit; ttl=300` (or `; fwd=miss` / `; fwd=stale`). Standard alternative to vendor-specific `X-Cache` patterns each CDN had historically. Cloudflare, Fastly, and Akamai all support emitting it.
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
`ETag` present -- conditional GET supported
A
Page Weight Inventory
5 resources · 69 KB · 0 KB savings available
PASS
5 resources · 69 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 69 KB
Warning::
3 third-party resources (79% of weight)
5 resources · 69.1 KiB · 3 third-party Within 1MB page-weight target
Font 78% · 53.9 KiB
Document 21% · 14.2 KiB
CSS 1% · 912 B
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+
JavaScript Blocking
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Network Waterfall
5 requests over 853ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.8 s LCP 2.8 shttps://benefit-estimator.netlify.app// https://benefit-estimator.netlify.app/ — 200 — 12.9 KiB — 387 ms — h2https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&display=swapfonts.googleapis.com/css2?family=DM... https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&display=swap — 200 — 912 B — 169 ms — h2https://fonts.gstatic.com/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu0-K6z9mXg.woff2fonts.gstatic.com/s/dmsans/v17/rP2Y... https://fonts.gstatic.com/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu0-K6z9mXg.woff2 — 200 — 36.1 KiB — 107 ms — h3https://fonts.gstatic.com/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu6-K6z9mXgjU0.woff2fonts.gstatic.com/s/dmsans/v17/rP2Y... https://fonts.gstatic.com/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu6-K6z9mXgjU0.woff2 — 200 — 17.8 KiB — 97 ms — h3https://benefit-estimator.netlify.app/favicon.ico/favicon.ico https://benefit-estimator.netlify.app/favicon.ico — 404 — 1.3 KiB — 145 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
28% of JavaScript execution is third-party
First-party Third-party 87ms · 0KB · $1/mo
Unattributable
Other
Optional
Execution 87ms
Transfer 0 KB
Monthly Cost $1/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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