42of 100
99fab.com
277msTTFB
39Lighthouse
81LH desktop
15.6sLCP
0.00CLS
brCompression
MISSCache
Core Web Vitals & lab metricsF30
1/5 checks passed · 12/40 pts Jump to section ↓
Server response & cachingD56
3/5 checks passed · 14/25 pts Jump to section ↓
Asset optimizationD57
1/2 checks passed · 4/7 pts Jump to section ↓
Shopify what actually works on this platform
On Shopify the server is not yours to tune — Shopify runs it, and its TTFB is what it is. What you control is the theme and the apps, and on most stores the apps are the problem.
- Time to first byte measured 277ms, which is Shopify's to control rather than yours — do not spend effort there.
- Audit the apps before touching the theme. Every installed app that injects a script costs every page, including the ones it has nothing to do with. Uninstalled apps often leave their snippets behind in the theme. This is the largest and least glamorous win on most stores — count the third-party scripts on a product page and ask which are earning their place.
- Prefer theme app extensions to injected script tags. Extensions load through Shopify's own pipeline and can be removed cleanly; script tags injected into the theme cannot, and are what accumulates over years of installing and uninstalling.
- Serve images at the size they are displayed. Liquid can request an exact width from Shopify's CDN. A 2000px hero scaled down in CSS is paid for at full size by every visitor on a phone.
- Defer what does not paint the page. Reviews, chat widgets, popups and analytics rarely need to run before the product is visible. Loading them after interaction keeps the main thread free when it matters.
- Do not chase TTFB. It is Shopify's number. Measure what a visitor waits for — when the product image and price appear — and optimise that instead.
The full instruction set, and a machine-readable copy of this report, live at 99fab.com.md — paste that URL into your AI builder's chat and it can work straight from these measurements.
Top fixes ranked by points recovered
This is a Shopify site — act on the report with your AI assistant
- ✓Platform detectedShopify — every check below links the official guideline for the fix in this stack.
- →Act on it with your AIThe machine-readable twin of this report gives an agent every failing check with its evidence, remediation and guideline link.
- →Check the originHosting sets the floor on TTFB. xCloud hosts any stack — agent/MCP access built in, bring-your-own-server pricing.
xSpeed is a WordPress plugin, so it can't automate Shopify fixes — and that's fine. Every check below links its official guideline, and the machine-readable twin of this report gives an AI everything it needs to plan the work (10 checks name a concrete remediation):
Read the speed report at https://xspeedcache.com/scan/r/99fab-com-3fe01defd9.md — it lists every failing check with evidence and the official guideline for the fix. Produce a prioritized fix plan for my Shopify site, apply what you can, then re-test by POSTing {"url":"https://99fab.com/"} to https://xspeedcache.com/api/scan and compare the scores.Hosting is half of every score.
Shopify manages the servers here, so hosting isn't yours to tune. If this site ever moves to its own stack, that choice becomes the biggest lever — xCloud (from the team behind xSpeed) hosts anything, with agent/MCP access built in and bring-your-own-server pricing.
F
30/100
Core Web Vitals & lab metrics
1/5 checks passed · 12/40 pts earned
Fail
Lighthouse performance score (mobile) 7/18 pts
39/100 (Lighthouse 13.4.1, mobile)
The composite Lighthouse score — every fix below moves it.
xSpeed Free
AI Optimize
AI prompt
Using my site's xSpeed MCP connection: run optimize_site, then run_benchmark to verify the score improved.Guidelines: Lighthouse performance scoring
Fail
Largest Contentful Paint ≤ 2.5s 0/8 pts
LCP 15.6s
Serve the hero content faster: cache the page, preload the LCP image, and ship critical CSS.
xSpeed Free
Page Cache + Preloader (Critical CSS in Pro)
AI prompt
Using my site's xSpeed MCP connection: enable page caching, start the preloader, and (on Pro) generate critical CSS for this page; then re-test LCP.Guidelines: web.dev — Largest Contentful Paint · Optimize LCP
Pass
Fail
Total Blocking Time ≤ 200ms 0/5 pts
TBT 969ms
Less JavaScript on the main thread: defer scripts and drop unused bundles.
xSpeed Free
JS Minify + Defer
AI prompt
Using my site's xSpeed MCP connection: enable JS minification and deferred loading, then re-test Total Blocking Time.Guidelines: web.dev — Total Blocking Time
Fail
First Contentful Paint ≤ 1.8s 0/4 pts
FCP 3.6s
First paint is gated on server response and render-blocking CSS.
xSpeed Free
Page Cache + CSS Minify
AI prompt
Using my site's xSpeed MCP connection: enable page caching and CSS minification, then re-test First Contentful Paint.Guidelines: web.dev — First Contentful Paint
D
56/100
Server response & caching
3/6 checks passed · 14/25 pts earned
Partial
Time to first byte ≤ 200ms 4/8 pts
TTFB 277ms (best of 2 requests from our scanner)
The server rebuilds the page on every request. A page cache answers in 5–15ms.
xSpeed Free
Page Cache
AI prompt
Using my site's xSpeed MCP connection: enable page caching and warm this page with the preloader, then re-check TTFB.Guidelines: web.dev — Time to First Byte
Fail
Page served from cache 0/7 pts
No cache evidence in headers or HTML
Serve HTML from a static cache instead of rebuilding it per visitor.
xSpeed Free
Page Cache + Preloader
AI prompt
Using my site's xSpeed MCP connection: enable page caching, start the preloader so pages are pre-warmed, and confirm get_cache_status reports hits.Guidelines: MDN — HTTP caching
Pass
HTML compression (Brotli/GZIP) 5/5 pts
Content-Encoding: br
Guidelines: MDN — Content-Encoding · RFC 7932 — Brotli
Info
Efficient cache policy on static assets 0/5 pts
Needs the Lighthouse audit
Re-run when Lighthouse is available.
Guidelines: Lighthouse — Efficient cache policy
Pass
Pass
Clean redirect chain 2/2 pts
No redirects — the URL answers directly
Guidelines: Lighthouse — Avoid redirects
D
57/100
Asset optimization
1/5 checks passed · 4/7 pts earned
Info
No render-blocking resources 0/5 pts
Audit not reported for this page
Re-run when Lighthouse is available.
xSpeed Pro
Critical CSS + Unused CSS removal
AI prompt
Using my site's xSpeed MCP connection: generate critical CSS for the top pages and enable unused-CSS removal, then re-test.Guidelines: Lighthouse — Render-blocking resources
Pass
Minified CSS and JavaScript 4/4 pts
Lighthouse audit score 100%
Guidelines: Lighthouse — Minify CSS · Minify JavaScript
Info
Modern, optimized image formats 0/4 pts
Audit not reported for this page
Re-run when Lighthouse is available.
xSpeed Pro
Image Converter (WebP/AVIF)
AI prompt
Using my site's xSpeed MCP connection: enable WebP/AVIF conversion with URL rewriting, then re-test image audits.Guidelines: Lighthouse — Modern image formats
Info
Offscreen images lazy-loaded 0/4 pts
Audit not reported for this page
Re-run when Lighthouse is available.
xSpeed Free
Lazy Load
AI prompt
Using my site's xSpeed MCP connection: enable lazy loading for images and iframes, then re-test.Guidelines: Lighthouse — Defer offscreen images
Fail
Total page weight ≤ 1.5MB 0/3 pts
5.3MB transferred
Heavy pages are slow on every connection — compress, lazy-load, and trim.
xSpeed Free
Minify + Lazy Load + Image Converter (Pro)
AI prompt
Using my site's xSpeed MCP connection: enable minification and lazy loading (and image conversion on Pro), then re-check page weight.Guidelines: Lighthouse — Total byte weight
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