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https://app.winihealth.com

Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
4
REVIEW
7
PASS
12
INFO
2

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

Mobile Desktop
37
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
76
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
73
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.

11.35 s

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

12.23 s

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

759 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.

11.35 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.

12.24 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
12 PASS 7 REVIEW 4 FIX
F
JS Execution Cost
Action
3638ms total JS execution
FIX
3638ms total JS execution
Warning::
https://app.winihealth.com/assets/index-CM-IRktF.j...: 2912ms CPU time
Warning::
Unattributable: 653ms CPU time
Info::
https://app.winihealth.com/: 73ms CPU time

Main Thread Breakdown

Script Evaluation 79% Other 18%
ScriptTotalScriptingParse/CompileParty
https://app.winihealth.com/assets/index-CM-IRktF.js2912ms2855ms17ms1st
Unattributable653ms26ms0ms1st
https://app.winihealth.com/73ms4ms1ms1st
F
JS Bundles
Action
2 scripts, 949 KB unused
FIX
2 scripts, 949 KB unused
Warning::
https://app.winihealth.com/assets/index-CM-IRktF.j...: 949 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 949 KB
949 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://app.winihealth.com/assets/index-CM-IRktF.js1638 KB949 KB (58%)✓1st
https://app.winihealth.com/registerSW.js0 KB—✓1st

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
Page Weight Inventory
Action
12 resources · 1.7 MB · 949 KB savings available
FIX
12 resources · 1.7 MB · 949 KB savings available
Warning::
Page weight 1.7 MB exceeds 1 MB target by 741 KB
Got: 1.7 MB Expected: ≤ 1 MB
Info::
~949 KB of savings available
Info::
4 third-party resources (4% of weight)
Info::
1 resources over 200KB
12 resources · 1.7 MiB · 4 third-party 740.8 KiB over 1MB target
JavaScript 93% · 1.6 MiB
Font 3% · 61.1 KiB
CSS 3% · 51.5 KiB
Image 1% · 11.6 KiB
Other 0% · 1.5 KiB
Document 0% · 883 B

~949.0 KiB of savings available

Remove unused JavaScript: 949.0 KiB
D
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Page Weight Budget
Action
1.7 MB transferred, 12 requests
REVIEW
1.7 MB transferred, 12 requests
Info::
Page weighs 5.9 MB (1.7 MB transferred)
Warning::
JavaScript is 1.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.6 MB
Info::
12 HTTP requests
Info::
Estimated 0.36 g CO2 per page load
1.7 MB / 2.4 MB budget
1.7 MB transferred
12 requests
0.36 g CO2 per page load
JavaScript 1.6 MiB 93%
Fonts 61.1 KiB 3%
CSS 51.5 KiB 3%
Other 11.6 KiB 1%
Other 1.1 KiB 0%
HTML 883 B 0%
Other 281 B 0%
Other 157 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

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
Document Compression
Action
Document response served uncompressed
REVIEW
Document 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
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
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.
B
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 JS blocking issue(s) detected
Warning::
1 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
Total JS execution time is 3.6 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
4% third-party, 0 ms blocking
PASS
4% third-party, 0 ms blocking
Info::
Third-party code accounts for 4% of page weight (62.6 KiB of 1.7 MiB)
Info::
Third-party blocking time is low (0 ms)
96%
First-party Third-party
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
1 fonts (61 KB)
PASS
1 fonts (61 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

61 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 11.4 s LCP 12.2 shttps://fonts.gstatic.com/s/dmsans/v17/rP2Hp2ywxg089UriCZOIHTWEBlw.woff2rP2Hp2ywxg089UriCZOIHTW... https://fonts.gstatic.com/s/dmsans/v17/rP2Hp2ywxg089UriCZOIHTWEBlw.woff2 — 61.1 KiB — 125 ms — font-display: swap
rP2Hp2ywxg089UriCZOIHTW... woff2 swap
Size 61 KB
Load time 125 ms
Start 1.2 s
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+
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+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
Info::
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
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+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
12 requests over 1354ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 11.4 s LCP 12.2 shttps://app.winihealth.com// https://app.winihealth.com/ — 200 — 883 B — 16 ms — h2https://app.winihealth.com/assets/index-CM-IRktF.js/assets/index-CM-IRktF.js https://app.winihealth.com/assets/index-CM-IRktF.js — 200 — 1.6 MiB — 107 ms — h2https://app.winihealth.com/assets/index-Bxkw94DJ.css/assets/index-Bxkw94DJ.css https://app.winihealth.com/assets/index-Bxkw94DJ.css — 200 — 50.5 KiB — 22 ms — h2https://app.winihealth.com/registerSW.js/registerSW.js https://app.winihealth.com/registerSW.js — 200 — 445 B — 4 ms — h2https://app.winihealth.com/manifest.webmanifest/manifest.webmanifest https://app.winihealth.com/manifest.webmanifest — 200 — 1.1 KiB — 33 ms — h2https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800;1,9..40,300;1,9..40,400;1,9..40,500;1,9..40,600;1,9..40,700&display=swapfonts.googleapis.com/css2?family=DM... https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800;1,9..40,300;1,9..40,400;1,9..40,500;1,9..40,600;1,9..40,700&display=swap — 200 — 1.0 KiB — 258 ms — h2https://o4509822993694720.ingest.us.sentry.io/api/4509823023775744/envelope/?sentry_version=7&sentry_key=5565d7f78ddedf04b3bef91424d4aa30&sentry_client=sentry.javascript.react%2F10.4.0o4509822993694720.ingest.us.sentry.... https://o4509822993694720.ingest.us.sentry.io/api/4509823023775744/envelope/?sentry_version=7&sentry_key=5565d7f78ddedf04b3bef91424d4aa30&sentry_client=sentry.javascript.react%2F10.4.0 — 200 — 281 B — 97 ms — h2https://app.winihealth.com/favicon.png/favicon.png https://app.winihealth.com/favicon.png — 200 — 2.3 KiB — 21 ms — h2https://api.ipify.org/?format=jsonapi.ipify.org/?format=json https://api.ipify.org/?format=json — 200 — 157 B — 169 ms — h2https://app.winihealth.com/icons/wini.svg/icons/wini.svg https://app.winihealth.com/icons/wini.svg — 200 — 9.3 KiB — 21 ms — h2https://app.winihealth.com/favicon.png/favicon.png https://app.winihealth.com/favicon.png — 200 — 0 B — 5 ms — h2https://fonts.gstatic.com/s/dmsans/v17/rP2Hp2ywxg089UriCZOIHTWEBlw.woff2fonts.gstatic.com/s/dmsans/v17/rP2H... https://fonts.gstatic.com/s/dmsans/v17/rP2Hp2ywxg089UriCZOIHTWEBlw.woff2 — 200 — 61.1 KiB — 125 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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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