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Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
2
REVIEW
7
PASS
14
INFO
3

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

Mobile Desktop
55
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.

5.93 s

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

5.93 s

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

184 ms

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

0.145

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

6.14 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.

9.55 s

Page Load Progression

624 ms
1.2 s
1.9 s
2.5 s
3.1 s
3.7 s
4.4 s
5.0 s
Checks
26
14 PASS 7 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (970.5 KiB of 970.9 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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.

C
JS Execution Cost
Action
1352ms total JS execution
REVIEW
1352ms total JS execution
Warning::
https://www.googletagmanager.com/gtag/js?id=G-2P82...: 428ms CPU time
Warning::
Unattributable: 302ms CPU time
Info::
https://jaxslayher.com/?nats=Mi4xLjIuMy4xLjAuMC4wL...: 237ms CPU time
Info::
https://jaxslayher.com/_next/static/chunks/864-976...: 205ms CPU time
Info::
https://jaxslayher.com/_next/static/chunks/fd9d105...: 107ms CPU time
Warning::
Third-party scripts: 1050ms (78% of total)

Main Thread Breakdown

Script Evaluation 51% Other 23% Script Parsing & Compilation 11% Style & Layout 10%
ScriptTotalScriptingParse/CompileParty
https://www.googletagmanager.com/gtag/js?id=G-2P8267HWQW428ms356ms69ms3rd
Unattributable302ms17ms0ms1st
https://jaxslayher.com/?nats=Mi4xLjIuMy4xLjAuMC4wLjA237ms14ms13ms3rd
https://jaxslayher.com/_next/static/chunks/864-976a44f4a7e551e8.js205ms180ms18ms3rd
https://jaxslayher.com/_next/static/chunks/fd9d1056-8ccaeadeeaf29e91.js107ms83ms24ms3rd
https://jaxslayher.com/_next/static/chunks/webpack-d23b2e19b9a17abb.js72ms54ms1ms3rd
C
JS Bundles
Action
19 scripts, 255 KB unused
REVIEW
19 scripts, 255 KB unused
Warning::
https://jaxslayher.com/_next/static/chunks/442-530...: 75 KB unused (92%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-2P82...: 65 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://jaxslayher.com/_next/static/chunks/fd9d105...: 55 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 (35%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://jaxslayher.com/_next/static/chunks/app/tou...: 23 KB unused (95%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 255 KB
255 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://jaxslayher.com/_next/static/chunks/442-53012fc3ae3e0068.js81 KB75 KB (92%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-2P8267HWQW160 KB65 KB (41%)✓3rd
https://jaxslayher.com/_next/static/chunks/fd9d1056-8ccaeadeeaf29e91.js160 KB55 KB (34%)✓3rd
https://jaxslayher.com/_next/static/chunks/864-976a44f4a7e551e8.js108 KB37 KB (35%)✓3rd
https://jaxslayher.com/_next/static/chunks/app/tour/layout-ef8cf17900c621c1.js24 KB23 KB (95%)✓3rd
https://jaxslayher.com/_next/static/chunks/app/layout-2d51c108c826f2c4.js9 KB—✓3rd
https://jaxslayher.com/_next/static/chunks/app/join/page-f23937a9faf85695.js20 KB—✓3rd
https://jaxslayher.com/_next/static/chunks/app/page-a42d7bd73dfba87e.js2 KB—✓3rd
https://jaxslayher.com/_next/static/chunks/webpack-d23b2e19b9a17abb.js5 KB—✓3rd
https://jaxslayher.com/_next/static/chunks/30a37ab2-8d0154040a44eb2a.js3 KB—✓3rd

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

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.
B
Page Weight Inventory
32 resources · 971 KB · 255 KB savings available
REVIEW
32 resources · 971 KB · 255 KB savings available
Info::
Within 1MB page-weight target
Got: 971 KB
Info::
~255 KB of savings available
Warning::
31 third-party resources (100% of weight)
32 resources · 970.9 KiB · 31 third-party Within 1MB page-weight target
JavaScript 67% · 651.9 KiB
Image 15% · 145.2 KiB
CSS 8% · 74.2 KiB
Font 5% · 45.0 KiB
Other 4% · 42.7 KiB
Document 1% · 11.9 KiB

~255.1 KiB of savings available

Remove unused JavaScript: 255.1 KiB
A
Page Weight Budget
971 KB transferred, 32 requests
PASS
971 KB transferred, 32 requests
Info::
Page weighs 1.6 MB (971 KB transferred)
Warning::
JavaScript is 652 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 652 KB
Info::
32 HTTP requests
Info::
Estimated 0.20 g CO2 per page load
971 KB / 2.4 MB budget
971 KB transferred
32 requests
0.20 g CO2 per page load
JavaScript 651.9 KiB 67%
Images 130.2 KiB 13%
CSS 74.2 KiB 8%
Fonts 45.0 KiB 5%
Other 42.7 KiB 4%
Other 16.7 KiB 2%
HTML 10.3 KiB 1%
0 2.4 MB 4.9 MB
Under budget

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

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
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Info::
All images are well-optimized
1 images 130 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
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 5.0 s 6.0 s FCP 5.9 s LCP 5.9 shttps://fonts.gstatic.com/s/robotocondensed/v31/ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2ieVl2ZhZI2eCN5jzbjEETS9... https://fonts.gstatic.com/s/robotocondensed/v31/ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2 — 45.0 KiB — 12 ms — font-display: swap
ieVl2ZhZI2eCN5jzbjEETS9... woff2 swap
Size 45 KB
Load time 12 ms
Start 1.9 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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
—
preload
3
dns-prefetch
—
prefetch
—

3 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
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
32 requests over 7895ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 5.9 s LCP 5.9 shttps://jaxslayher.tv// https://jaxslayher.tv/ — 301 — 450 B — 26 ms — h3https://join.jaxslayher.com/track/Mi4xLjIuMy4xLjAuMC4wLjAjoin.jaxslayher.com/track/Mi4xLjIuM... https://join.jaxslayher.com/track/Mi4xLjIuMy4xLjAuMC4wLjA — 302 — 1.2 KiB — 777 ms — h2https://jaxslayher.com/?nats=Mi4xLjIuMy4xLjAuMC4wLjAjaxslayher.com/?nats=Mi4xLjIuMy4xLj... https://jaxslayher.com/?nats=Mi4xLjIuMy4xLjAuMC4wLjA — 200 — 10.3 KiB — 758 ms — http/1.1https://jaxslayher.com/_next/static/css/7146e346efc6ac24.cssjaxslayher.com/_next/static/css/714... https://jaxslayher.com/_next/static/css/7146e346efc6ac24.css — 200 — 11.5 KiB — 288 ms — http/1.1https://jaxslayher.com/_next/static/chunks/webpack-d23b2e19b9a17abb.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/webpack-d23b2e19b9a17abb.js — 200 — 4.7 KiB — 559 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 — 159.8 KiB — 36 ms — h2https://jaxslayher.com/_next/static/chunks/fd9d1056-8ccaeadeeaf29e91.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/fd9d1056-8ccaeadeeaf29e91.js — 200 — 160.3 KiB — 3.3 s — http/1.1https://jaxslayher.com/_next/static/chunks/864-976a44f4a7e551e8.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/864-976a44f4a7e551e8.js — 200 — 108.1 KiB — 3.0 s — http/1.1https://jaxslayher.com/_next/static/chunks/main-app-1c0615638dc41446.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/main-app-1c0615638dc41446.js — 200 — 814 B — 755 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 — 27 ms — h2https://jaxslayher.com/_next/static/media/warning-page-mobile.1c94725d.jpgjaxslayher.com/_next/static/media/w... https://jaxslayher.com/_next/static/media/warning-page-mobile.1c94725d.jpg — 200 — 130.2 KiB — 3.0 s — 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 — 12 ms — h3https://jaxslayher.com/_next/static/chunks/724-c42d167e53473151.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/724-c42d167e53473151.js — 200 — 21.7 KiB — 508 ms — http/1.1https://jaxslayher.com/_next/static/chunks/964-45f62651df057534.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/964-45f62651df057534.js — 200 — 13.5 KiB — 511 ms — http/1.1https://jaxslayher.com/_next/static/chunks/app/page-a42d7bd73dfba87e.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/app/page-a42d7bd73dfba87e.js — 200 — 1.8 KiB — 279 ms — http/1.1https://jaxslayher.com/_next/static/chunks/app/layout-2d51c108c826f2c4.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/app/layout-2d51c108c826f2c4.js — 200 — 9.1 KiB — 235 ms — http/1.1https://jaxslayher.com/favicon.icojaxslayher.com/favicon.ico https://jaxslayher.com/favicon.ico — 200 — 15.0 KiB — 538 ms — http/1.1https://www.google-analytics.com/g/collect?v=2&tid=G-2P8267HWQW&gtm=45je67d0v9168418187za200zd9168418187&_p=1784057577104&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=304330926.1784057577&frm=0&ngs=1&pscdl=noapi&rcb=8&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=115938465~115938469~118395335~118826210~118897920~118897930~118981135~119027224~119773331&sid=1784057577&sct=1&seg=0&dl=https%3A%2F%2Fjaxslayher.com%2F%3Fnats%3DMi4xLjIuMy4xLjAuMC4wLjA&dt=WARNING%2018%2B%20ADULT%20CONTENT%20AHEAD%20%7C%20JaxSlayher.com&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=5526www.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-2P8267HWQW&gtm=45je67d0v9168418187za200zd9168418187&_p=1784057577104&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=304330926.1784057577&frm=0&ngs=1&pscdl=noapi&rcb=8&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=115938465~115938469~118395335~118826210~118897920~118897930~118981135~119027224~119773331&sid=1784057577&sct=1&seg=0&dl=https%3A%2F%2Fjaxslayher.com%2F%3Fnats%3DMi4xLjIuMy4xLjAuMC4wLjA&dt=WARNING%2018%2B%20ADULT%20CONTENT%20AHEAD%20%7C%20JaxSlayher.com&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=5526 — 204 — 548 B — 31 ms — h2https://jaxslayher.com/tour.txt?_rsc=acgkzjaxslayher.com/tour.txt?_rsc=acgkz https://jaxslayher.com/tour.txt?_rsc=acgkz — 200 — 19.1 KiB — 293 ms — http/1.1https://jaxslayher.com/join.txt?_rsc=acgkzjaxslayher.com/join.txt?_rsc=acgkz https://jaxslayher.com/join.txt?_rsc=acgkz — 200 — 7.5 KiB — 280 ms — http/1.1https://jaxslayher.com/tour/2257.txt?_rsc=acgkzjaxslayher.com/tour/2257.txt?_rsc=a... https://jaxslayher.com/tour/2257.txt?_rsc=acgkz — 200 — 15.6 KiB — 565 ms — http/1.1https://jaxslayher.com/_next/static/chunks/30a37ab2-8d0154040a44eb2a.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/30a37ab2-8d0154040a44eb2a.js — 200 — 2.9 KiB — 271 ms — http/1.1https://jaxslayher.com/_next/static/chunks/f97e080b-345e80a3e30bf27c.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/f97e080b-345e80a3e30bf27c.js — 200 — 791 B — 275 ms — http/1.1https://jaxslayher.com/_next/static/chunks/581-9ced72f2a234a062.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/581-9ced72f2a234a062.js — 200 — 20.5 KiB — 781 ms — http/1.1https://jaxslayher.com/_next/static/chunks/app/join/page-f23937a9faf85695.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/app/join/page-f23937a9faf85695.js — 200 — 20.4 KiB — 462 ms — http/1.1https://jaxslayher.com/_next/static/css/17cffd0e6e1ede65.cssjaxslayher.com/_next/static/css/17c... https://jaxslayher.com/_next/static/css/17cffd0e6e1ede65.css — 200 — 3.5 KiB — 404 ms — http/1.1https://jaxslayher.com/_next/static/chunks/125-cb274990d20fa811.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/125-cb274990d20fa811.js — 200 — 1.6 KiB — 235 ms — http/1.1https://jaxslayher.com/_next/static/chunks/app/tour/layout-ef8cf17900c621c1.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/app/tour/layout-ef8cf17900c621c1.js — 200 — 24.5 KiB — 472 ms — http/1.1https://jaxslayher.com/_next/static/chunks/442-53012fc3ae3e0068.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/442-53012fc3ae3e0068.js — 200 — 81.1 KiB — 1.8 s — http/1.1https://jaxslayher.com/_next/static/chunks/36-7e4f22a2416a21a7.jsjaxslayher.com/_next/static/chunks/... https://jaxslayher.com/_next/static/chunks/36-7e4f22a2416a21a7.js — 200 — 10.5 KiB — 239 ms — http/1.1
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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
78% of JavaScript execution is third-party
First-party Third-party 1050ms · 443KB · $14/mo
Google Tag Manager
Tag Manager
Costly
Execution 428ms
Transfer 160 KB
Unused 41%
Monthly Cost $6/mo
jaxslayher.com
Other
Costly
Execution 237ms
Transfer 10 KB
Monthly Cost $3/mo
jaxslayher.com
Other
Costly
Execution 205ms
Transfer 108 KB
Unused 35%
Monthly Cost $3/mo
jaxslayher.com
Other
Optional
Execution 107ms
Transfer 160 KB
Unused 34%
Monthly Cost $1/mo
jaxslayher.com
Other
Optional
Execution 72ms
Transfer 5 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 428ms and costs ~$6/month
  • jaxslayher.com adds 237ms and costs ~$3/month
  • jaxslayher.com adds 205ms and costs ~$3/month

78% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

Google Tag Manager takes 428ms 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

jaxslayher.com takes 237ms 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

jaxslayher.com takes 205ms 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

Image Optimization
2 images, 290 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

2

Total Size

290 KB

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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