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https://jaxslayher.com

Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
83
GRADE
B
FIX
2
REVIEW
9
PASS
12
INFO
4

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

Mobile Desktop
78
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
84
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.
92
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.

3.22 s

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

4.19 s

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

88 ms

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

0.063

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

3.54 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.

11.62 s

Page Load Progression

592 ms
1.2 s
1.8 s
2.4 s
3.0 s
3.6 s
4.1 s
4.7 s
Checks
27
12 PASS 9 REVIEW 2 FIX
F
Page Weight Budget
Action
4.4 MB transferred, 42 requests
FIX
4.4 MB transferred, 42 requests
Critical::
Page weighs 5.1 MB (4.4 MB transferred)
Warning::
Images are 1.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.4 MB
Warning::
JavaScript is 549 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 549 KB
Info::
42 HTTP requests
Info::
Estimated 0.93 g CO2 per page load
4.4 MB / 2.4 MB budget
4.4 MB transferred
42 requests
0.93 g CO2 per page load
Other 2.4 MiB 54%
Images 1.4 MiB 31%
JavaScript 549.1 KiB 12%
CSS 70.7 KiB 2%
Fonts 45.0 KiB 1%
HTML 26.5 KiB 1%
Other 15.5 KiB 0%
Other 8.0 KiB 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

F
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.

No Cache-Control header

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

B
Image Optimization
15 images, 0 KB saveable
REVIEW
15 images, 0 KB saveable
Info::
All images are well-optimized
15 images 1.4 MB
0 oversized -0 KB
15 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1521ms total JS execution
REVIEW
1521ms total JS execution
Warning::
Unattributable: 595ms CPU time
Warning::
https://jaxslayher.com/tour/sfw: 350ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-2P82...: 279ms CPU time
Info::
https://jaxslayher.com/_next/static/chunks/864-976...: 232ms CPU time
Info::
https://jaxslayher.com/_next/static/chunks/fd9d105...: 65ms CPU time
Info::
Third-party scripts: 279ms (18% of total)

Main Thread Breakdown

Other 40% Script Evaluation 36% Style & Layout 9% Script Parsing & Compilation 6% Rendering 4%
ScriptTotalScriptingParse/CompileParty
Unattributable595ms17ms0ms1st
https://jaxslayher.com/tour/sfw350ms22ms12ms1st
https://www.googletagmanager.com/gtag/js?id=G-2P8267HWQW279ms231ms46ms3rd
https://jaxslayher.com/_next/static/chunks/864-976a44f4a7e551e8.js232ms216ms9ms1st
https://jaxslayher.com/_next/static/chunks/fd9d1056-8ccaeadeeaf29e91.js65ms46ms16ms1st
C
JS Bundles
Action
15 scripts, 158 KB unused
REVIEW
15 scripts, 158 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-2P82...: 67 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://jaxslayher.com/_next/static/chunks/fd9d105...: 54 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://jaxslayher.com/_next/static/chunks/864-976...: 37 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 158 KB
158 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-2P8267HWQW160 KB67 KB (42%)✓3rd
https://jaxslayher.com/_next/static/chunks/fd9d1056-8ccaeadeeaf29e91.js160 KB54 KB (34%)✓1st
https://jaxslayher.com/_next/static/chunks/864-976a44f4a7e551e8.js108 KB37 KB (34%)✓1st
https://jaxslayher.com/_next/static/chunks/964-45f62651df057534.js13 KB—✓1st
https://jaxslayher.com/_next/static/chunks/main-app-1c0615638dc41446.js1 KB—✓1st
https://jaxslayher.com/_next/static/chunks/724-c42d167e53473151.js22 KB—✓1st
https://jaxslayher.com/_next/static/chunks/webpack-d23b2e19b9a17abb.js5 KB—✓1st
https://jaxslayher.com/_next/static/chunks/125-cb274990d20fa811.js2 KB—✓1st
https://jaxslayher.com/_next/static/chunks/app/tour/layout-ef8cf17900c621c1.js24 KB—✓1st
https://jaxslayher.com/_next/static/chunks/app/tour/sfw/page-44adb689ff817f3d.js1 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

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

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

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
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.
C
Page Weight Inventory
Action
42 resources · 4.4 MB · 158 KB savings available
REVIEW
42 resources · 4.4 MB · 158 KB savings available
Warning::
Page weight 4.4 MB exceeds 1 MB target by 3.4 MB
Got: 4.4 MB Expected: ≤ 1 MB
Info::
~158 KB of savings available
Info::
4 third-party resources (6% of weight)
Info::
2 resources over 200KB
42 resources · 4.4 MiB · 4 third-party 3.4 MiB over 1MB target
Media 54% · 2.4 MiB
Image 31% · 1.4 MiB
JavaScript 12% · 549.1 KiB
CSS 2% · 70.7 KiB
Font 1% · 45.0 KiB
Document 1% · 27.0 KiB
Other 0% · 8.0 KiB

~157.9 KiB of savings available

Remove unused JavaScript: 157.9 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
6% third-party, 0 ms blocking
PASS
6% third-party, 0 ms blocking
Info::
Third-party code accounts for 6% of page weight (264.6 KiB of 4.4 MiB)
Info::
Third-party blocking time is low (0 ms)
94%
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+
Font Loading
1 fonts (45 KB)
PASS
1 fonts (45 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

45 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 4.0 s FCP 3.2 s LCP 4.2 shttps://fonts.gstatic.com/s/robotocondensed/v31/ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2ieVl2ZhZI2eCN5jzbjEETS9... https://fonts.gstatic.com/s/robotocondensed/v31/ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2 — 45.0 KiB — 60 ms — font-display: swap
ieVl2ZhZI2eCN5jzbjEETS9... woff2 swap
Size 45 KB
Load time 60 ms
Start 1.3 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
—
preload
4
dns-prefetch
—
prefetch
—

4 resource hints configured

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::
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+
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
Network Waterfall
42 requests over 2402ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.2 s LCP 4.2 shttps://jaxslayher.com// https://jaxslayher.com/ — 302 — 261 B — 394 ms — http/1.1https://jaxslayher.com/tour/sfw/tour/sfw https://jaxslayher.com/tour/sfw — 200 — 26.5 KiB — 259 ms — http/1.1https://jaxslayher.com/images/sfw/1.jpg/images/sfw/1.jpg https://jaxslayher.com/images/sfw/1.jpg — 200 — 98.3 KiB — 264 ms — http/1.1https://jaxslayher.com/images/sfw/3.jpg/images/sfw/3.jpg https://jaxslayher.com/images/sfw/3.jpg — 200 — 105.0 KiB — 541 ms — http/1.1https://jaxslayher.com/_next/static/css/7146e346efc6ac24.css/_next/static/css/7146e346efc6ac24.... https://jaxslayher.com/_next/static/css/7146e346efc6ac24.css — 200 — 11.5 KiB — 373 ms — http/1.1https://www.googletagmanager.com/gtag/js?id=G-2P8267HWQWwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-2P8267HWQW — 200 — 159.9 KiB — 268 ms — h2https://jaxslayher.com/_next/static/chunks/webpack-d23b2e19b9a17abb.js/_next/static/chunks/webpack-d23b2e... https://jaxslayher.com/_next/static/chunks/webpack-d23b2e19b9a17abb.js — 200 — 4.7 KiB — 385 ms — http/1.1https://jaxslayher.com/_next/static/chunks/fd9d1056-8ccaeadeeaf29e91.js/_next/static/chunks/fd9d1056-8ccae... https://jaxslayher.com/_next/static/chunks/fd9d1056-8ccaeadeeaf29e91.js — 200 — 160.3 KiB — 771 ms — http/1.1https://jaxslayher.com/_next/static/chunks/864-976a44f4a7e551e8.js/_next/static/chunks/864-976a44f4a7... https://jaxslayher.com/_next/static/chunks/864-976a44f4a7e551e8.js — 200 — 108.1 KiB — 802 ms — http/1.1https://jaxslayher.com/_next/static/chunks/main-app-1c0615638dc41446.js/_next/static/chunks/main-app-1c061... https://jaxslayher.com/_next/static/chunks/main-app-1c0615638dc41446.js — 200 — 814 B — 151 ms — http/1.1https://jaxslayher.com/video_thumbs/sfw-milk.mp4/video_thumbs/sfw-milk.mp4 https://jaxslayher.com/video_thumbs/sfw-milk.mp4 — 206 — 599.3 KiB — 603 ms — http/1.1https://fonts.googleapis.com/css2?family=M+PLUS+1+Code:wght@300;400&family=Roboto+Condensed:wght@300;400;700&display=swapfonts.googleapis.com/css2?family=M+... https://fonts.googleapis.com/css2?family=M+PLUS+1+Code:wght@300;400&family=Roboto+Condensed:wght@300;400;700&display=swap — 200 — 59.2 KiB — 228 ms — h2https://jaxslayher.com/video_thumbs/miss.mp4/video_thumbs/miss.mp4 https://jaxslayher.com/video_thumbs/miss.mp4 — 206 — 1.8 MiB — 635 ms — http/1.1https://jaxslayher.com/images/sfw/4.jpg/images/sfw/4.jpg https://jaxslayher.com/images/sfw/4.jpg — 200 — 107.6 KiB — 268 ms — http/1.1https://jaxslayher.com/images/sfw/5.jpg/images/sfw/5.jpg https://jaxslayher.com/images/sfw/5.jpg — 200 — 75.8 KiB — 402 ms — http/1.1https://fonts.gstatic.com/s/robotocondensed/v31/ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2fonts.gstatic.com/s/robotocondensed... https://fonts.gstatic.com/s/robotocondensed/v31/ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2 — 200 — 45.0 KiB — 60 ms — h3https://jaxslayher.com/images/sfw/6.jpg/images/sfw/6.jpg https://jaxslayher.com/images/sfw/6.jpg — 200 — 107.8 KiB — 131 ms — http/1.1https://jaxslayher.com/images/sfw/7.jpg/images/sfw/7.jpg https://jaxslayher.com/images/sfw/7.jpg — 200 — 97.5 KiB — 137 ms — http/1.1https://jaxslayher.com/images/sfw/8.jpg/images/sfw/8.jpg https://jaxslayher.com/images/sfw/8.jpg — 200 — 105.5 KiB — 130 ms — http/1.1https://jaxslayher.com/images/sfw/9.jpg/images/sfw/9.jpg https://jaxslayher.com/images/sfw/9.jpg — 200 — 95.2 KiB — 137 ms — http/1.1https://jaxslayher.com/images/sfw/10.jpg/images/sfw/10.jpg https://jaxslayher.com/images/sfw/10.jpg — 200 — 91.8 KiB — 136 ms — http/1.1https://jaxslayher.com/images/sfw/11.jpg/images/sfw/11.jpg https://jaxslayher.com/images/sfw/11.jpg — 200 — 115.0 KiB — 123 ms — http/1.1https://jaxslayher.com/images/sfw/12.jpg/images/sfw/12.jpg https://jaxslayher.com/images/sfw/12.jpg — 200 — 94.1 KiB — 129 ms — http/1.1https://jaxslayher.com/images/sfw/13.jpg/images/sfw/13.jpg https://jaxslayher.com/images/sfw/13.jpg — 200 — 110.4 KiB — 130 ms — http/1.1https://jaxslayher.com/images/sfw/14.jpg/images/sfw/14.jpg https://jaxslayher.com/images/sfw/14.jpg — 200 — 106.8 KiB — 269 ms — http/1.1https://jaxslayher.com/images/sfw/15.jpg/images/sfw/15.jpg https://jaxslayher.com/images/sfw/15.jpg — 200 — 69.9 KiB — 137 ms — http/1.1https://jaxslayher.com/_next/static/media/rta-logo.336785f3.png/_next/static/media/rta-logo.336785... https://jaxslayher.com/_next/static/media/rta-logo.336785f3.png — 200 — 1.9 KiB — 135 ms — http/1.1https://jaxslayher.com/_next/static/chunks/724-c42d167e53473151.js/_next/static/chunks/724-c42d167e53... https://jaxslayher.com/_next/static/chunks/724-c42d167e53473151.js — 200 — 21.7 KiB — 123 ms — http/1.1https://jaxslayher.com/_next/static/chunks/964-45f62651df057534.js/_next/static/chunks/964-45f62651df... https://jaxslayher.com/_next/static/chunks/964-45f62651df057534.js — 200 — 13.5 KiB — 128 ms — http/1.1https://jaxslayher.com/_next/static/chunks/125-cb274990d20fa811.js/_next/static/chunks/125-cb274990d2... https://jaxslayher.com/_next/static/chunks/125-cb274990d20fa811.js — 200 — 1.6 KiB — 129 ms — http/1.1
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.2 s LCP 4.2 shttps://jaxslayher.com// https://jaxslayher.com/ — 302 — 261 B — 394 ms — http/1.1https://jaxslayher.com/tour/sfw/tour/sfw https://jaxslayher.com/tour/sfw — 200 — 26.5 KiB — 259 ms — http/1.1https://jaxslayher.com/images/sfw/1.jpg/images/sfw/1.jpg https://jaxslayher.com/images/sfw/1.jpg — 200 — 98.3 KiB — 264 ms — http/1.1https://jaxslayher.com/images/sfw/3.jpg/images/sfw/3.jpg https://jaxslayher.com/images/sfw/3.jpg — 200 — 105.0 KiB — 541 ms — http/1.1https://jaxslayher.com/_next/static/css/7146e346efc6ac24.css/_next/static/css/7146e346efc6ac24.... https://jaxslayher.com/_next/static/css/7146e346efc6ac24.css — 200 — 11.5 KiB — 373 ms — http/1.1https://www.googletagmanager.com/gtag/js?id=G-2P8267HWQWwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-2P8267HWQW — 200 — 159.9 KiB — 268 ms — h2https://jaxslayher.com/_next/static/chunks/webpack-d23b2e19b9a17abb.js/_next/static/chunks/webpack-d23b2e... https://jaxslayher.com/_next/static/chunks/webpack-d23b2e19b9a17abb.js — 200 — 4.7 KiB — 385 ms — http/1.1https://jaxslayher.com/_next/static/chunks/fd9d1056-8ccaeadeeaf29e91.js/_next/static/chunks/fd9d1056-8ccae... https://jaxslayher.com/_next/static/chunks/fd9d1056-8ccaeadeeaf29e91.js — 200 — 160.3 KiB — 771 ms — http/1.1https://jaxslayher.com/_next/static/chunks/864-976a44f4a7e551e8.js/_next/static/chunks/864-976a44f4a7... https://jaxslayher.com/_next/static/chunks/864-976a44f4a7e551e8.js — 200 — 108.1 KiB — 802 ms — http/1.1https://jaxslayher.com/_next/static/chunks/main-app-1c0615638dc41446.js/_next/static/chunks/main-app-1c061... https://jaxslayher.com/_next/static/chunks/main-app-1c0615638dc41446.js — 200 — 814 B — 151 ms — http/1.1https://jaxslayher.com/video_thumbs/sfw-milk.mp4/video_thumbs/sfw-milk.mp4 https://jaxslayher.com/video_thumbs/sfw-milk.mp4 — 206 — 599.3 KiB — 603 ms — http/1.1https://fonts.googleapis.com/css2?family=M+PLUS+1+Code:wght@300;400&family=Roboto+Condensed:wght@300;400;700&display=swapfonts.googleapis.com/css2?family=M+... https://fonts.googleapis.com/css2?family=M+PLUS+1+Code:wght@300;400&family=Roboto+Condensed:wght@300;400;700&display=swap — 200 — 59.2 KiB — 228 ms — h2https://jaxslayher.com/video_thumbs/miss.mp4/video_thumbs/miss.mp4 https://jaxslayher.com/video_thumbs/miss.mp4 — 206 — 1.8 MiB — 635 ms — http/1.1https://jaxslayher.com/images/sfw/4.jpg/images/sfw/4.jpg https://jaxslayher.com/images/sfw/4.jpg — 200 — 107.6 KiB — 268 ms — http/1.1https://jaxslayher.com/images/sfw/5.jpg/images/sfw/5.jpg https://jaxslayher.com/images/sfw/5.jpg — 200 — 75.8 KiB — 402 ms — http/1.1https://fonts.gstatic.com/s/robotocondensed/v31/ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2fonts.gstatic.com/s/robotocondensed... https://fonts.gstatic.com/s/robotocondensed/v31/ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2 — 200 — 45.0 KiB — 60 ms — h3https://jaxslayher.com/images/sfw/6.jpg/images/sfw/6.jpg https://jaxslayher.com/images/sfw/6.jpg — 200 — 107.8 KiB — 131 ms — http/1.1https://jaxslayher.com/images/sfw/7.jpg/images/sfw/7.jpg https://jaxslayher.com/images/sfw/7.jpg — 200 — 97.5 KiB — 137 ms — http/1.1https://jaxslayher.com/images/sfw/8.jpg/images/sfw/8.jpg https://jaxslayher.com/images/sfw/8.jpg — 200 — 105.5 KiB — 130 ms — http/1.1https://jaxslayher.com/images/sfw/9.jpg/images/sfw/9.jpg https://jaxslayher.com/images/sfw/9.jpg — 200 — 95.2 KiB — 137 ms — http/1.1https://jaxslayher.com/images/sfw/10.jpg/images/sfw/10.jpg https://jaxslayher.com/images/sfw/10.jpg — 200 — 91.8 KiB — 136 ms — http/1.1https://jaxslayher.com/images/sfw/11.jpg/images/sfw/11.jpg https://jaxslayher.com/images/sfw/11.jpg — 200 — 115.0 KiB — 123 ms — http/1.1https://jaxslayher.com/images/sfw/12.jpg/images/sfw/12.jpg https://jaxslayher.com/images/sfw/12.jpg — 200 — 94.1 KiB — 129 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
18% of JavaScript execution is third-party
First-party Third-party 279ms · 160KB · $4/mo
Google Tag Manager
Tag Manager
Costly
Execution 279ms
Transfer 160 KB
Unused 42%
Monthly Cost $4/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 279ms and costs ~$4/month

Google Tag Manager takes 279ms 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

Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-06-14 — 2026-07-11)

LCP (p75)

2650 ms

72% good

INP (p75)

82 ms

95% good

CLS (p75)

0.010

87% good

FCP (p75)

2654 ms

TTFB (p75)

1466 ms

Image Optimization
15 images, 1378 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

15

Total Size

1378 KB

1 missing lazy loading
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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