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Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
92
GRADE
A
FIX
1
REVIEW
5
PASS
17
INFO
3

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

Mobile Desktop
86
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.
100
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.

3.21 s

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

3.21 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.

3.38 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.

3.21 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
26
17 PASS 5 REVIEW 1 FIX
D
Third-Party Impact
Action
89% third-party, 0 ms blocking
FIX
89% third-party, 0 ms blocking
Warning::
Third-party code accounts for 89% of page weight (172.9 KiB of 193.7 KiB)
Info::
Third-party blocking time is low (0 ms)
89%
First-party Third-party
C
JS Execution Cost
Action
1114ms total JS execution
REVIEW
1114ms total JS execution
Warning::
https://www.vcsift.com/: 722ms CPU time
Info::
https://www.vcsift.com/wp-content/themes/vcsift/as...: 181ms CPU time
Info::
https://cdn.tailwindcss.com/: 111ms CPU time
Info::
Unattributable: 101ms CPU time
Info::
Third-party scripts: 111ms (10% of total)

Main Thread Breakdown

Script Evaluation 53% Style & Layout 24% Other 11% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.vcsift.com/722ms353ms2ms1st
https://www.vcsift.com/wp-content/themes/vcsift/assets/js/main.js?ver=1.0.0181ms156ms1ms1st
https://cdn.tailwindcss.com/111ms80ms31ms3rd
Unattributable101ms5ms0ms1st
B
Document Compression
Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
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, s-maxage=7200
REVIEW
public, max-age=0, s-maxage=7200
Info::
Cache-Control header is set
Got: public, max-age=0, s-maxage=7200
Info::
CDN TTL: 2 hours (s-maxage=7200)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=0, s-maxage=7200

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
s-maxage7200CDN caches for 2 hours
A+
Page Weight Budget
194 KB transferred, 8 requests
PASS
194 KB transferred, 8 requests
Info::
Page weighs 594 KB (194 KB transferred)
Info::
8 HTTP requests
Info::
Estimated 0.04 g CO2 per page load
194 KB / 2.4 MB budget
194 KB transferred
8 requests
0.04 g CO2 per page load
JavaScript 125.7 KiB 65%
Fonts 47.3 KiB 24%
HTML 14.0 KiB 7%
CSS 5.8 KiB 3%
Other 861 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
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 (47 KB)
PASS
1 fonts (47 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

47 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 1.0 s 2.0 s 3.0 s FCP 3.2 s LCP 3.2 shttps://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2UcC73FwrK3iLTeHuS_nVMrM... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 47.3 KiB — 40 ms — font-display: swap
UcC73FwrK3iLTeHuS_nVMrM... woff2 swap
Size 47 KB
Load time 40 ms
Start 788 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
2 scripts, 0 KB unused
PASS
2 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.vcsift.com/wp-content/themes/vcsift/assets/js/main.js?ver=1.0.02 KB—✓1st
https://cdn.tailwindcss.com/3.4.17124 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
1 dns-prefetch redundant with preconnect on same origin
preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://fonts.googleapis.com. Remove the redundant dns-prefetch entries.
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
2
preload
—
dns-prefetch
2
prefetch
—

4 resource hints configured

preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://fonts.googleapis.com. Remove the redundant dns-prefetch entries.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
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, s-maxage=7200
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
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::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A
Page Weight Inventory
8 resources · 194 KB · 0 KB savings available
PASS
8 resources · 194 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 194 KB
Warning::
4 third-party resources (89% of weight)
8 resources · 193.7 KiB · 4 third-party Within 1MB page-weight target
JavaScript 65% · 125.7 KiB
Font 24% · 47.3 KiB
Document 7% · 14.0 KiB
CSS 3% · 5.8 KiB
Other 0% · 471 B
Image 0% · 390 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
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
2 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.
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
8 requests over 951ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 3.2 s LCP 3.2 shttps://www.vcsift.com// https://www.vcsift.com/ — 200 — 14.0 KiB — 424 ms — h2https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swapfonts.googleapis.com/css2?family=In... https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap — 200 — 1.2 KiB — 71 ms — h2https://www.vcsift.com/wp-content/themes/vcsift/assets/css/main.css?ver=1.0.0/wp-content/themes/vcsift/assets/cs... https://www.vcsift.com/wp-content/themes/vcsift/assets/css/main.css?ver=1.0.0 — 200 — 4.5 KiB — 105 ms — h2https://cdn.tailwindcss.com/cdn.tailwindcss.com/ https://cdn.tailwindcss.com/ — 302 — 471 B — 72 ms — h2https://www.vcsift.com/wp-content/themes/vcsift/assets/js/main.js?ver=1.0.0/wp-content/themes/vcsift/assets/js... https://www.vcsift.com/wp-content/themes/vcsift/assets/js/main.js?ver=1.0.0 — 200 — 1.8 KiB — 103 ms — h2https://cdn.tailwindcss.com/3.4.17cdn.tailwindcss.com/3.4.17 https://cdn.tailwindcss.com/3.4.17 — 200 — 123.9 KiB — 51 ms — h2https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2fonts.gstatic.com/s/inter/v20/UcC73... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 200 — 47.3 KiB — 40 ms — h3https://www.vcsift.com/wp-content/themes/vcsift/assets/img/favicon.svg/wp-content/themes/vcsift/assets/im... https://www.vcsift.com/wp-content/themes/vcsift/assets/img/favicon.svg — 200 — 390 B — 104 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
10% of JavaScript execution is third-party
First-party Third-party 111ms · 0KB · €2/mo
cdn.tailwindcss.com
Other
Optional
Execution 111ms
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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