https://sylvaniaoh.clothesmentor.com
Performance
· 28 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
87
GRADE
B
FIX
3
REVIEW
6
PASS
15
INFO
4
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
54
95
96
92
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
4.77 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
9.90 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
307 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.060
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.12 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.
10.01 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 sChecks
2815 PASS 6 REVIEW 3 FIX
DPage Weight BudgetAction2.2 MB transferred, 267 requestsFIX
Page Weight Budget
Action2.2 MB transferred, 267 requests
2.2 MB transferred, 267 requests
Info::
Page weighs 2.5 MB (2.2 MB transferred)
Warning::
267 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.46 g CO2 per page load
2.2 MB transferred
267 requests
0.46 g CO2 per page load
Other 937.0 KiB 42%
Images 731.8 KiB 32%
JavaScript 372.4 KiB 17%
Fonts 92.2 KiB 4%
CSS 57.7 KiB 3%
HTML 46.8 KiB 2%
Other 10.6 KiB 0%
Other 7.0 KiB 0%
Other 907 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Why this matters
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DJS Execution CostAction3468ms total JS executionFIX
JS Execution Cost
Action3468ms total JS execution
3468ms total JS execution
Warning::
Unattributable: 1060ms CPU time
Warning::
https://sylvaniaoh.clothesmentor.com/: 808ms CPU time
Warning::
https://sylvaniaoh.clothesmentor.com/cdn/wpm/b05c6...: 653ms CPU time
Warning::
https://sylvaniaoh.clothesmentor.com/cdn/shopifycl...: 280ms CPU time
Info::
https://sylvaniaoh.clothesmentor.com/cdn/s/trekkie...: 180ms CPU time
Info::
Third-party scripts: 197ms (6% of total)
Main Thread Breakdown
Script Evaluation 42% Other 34% Style & Layout 13% Parse HTML & CSS 5% Script Parsing & Compilation 4%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1060ms | 41ms | 0ms | 1st |
| https://sylvaniaoh.clothesmentor.com/ | 808ms | 147ms | 24ms | 1st |
| https://sylvaniaoh.clothesmentor.com/cdn/wpm/b05c62d7ewbe538af9pdeb4fec1me339d55am.js | 653ms | 274ms | 52ms | 1st |
| https://sylvaniaoh.clothesmentor.com/cdn/shopifycloud/storefront/assets/shop_events_listener-4e26a9ce.js | 280ms | 276ms | 1ms | 1st |
| https://sylvaniaoh.clothesmentor.com/cdn/s/trekkie.storefront.27d1ed78e37fdd7f8767f655600479b6802fa878.min.js | 180ms | 158ms | 18ms | 1st |
| https://cdn.hextom.com/js/freeshippingbar.js?shop=clothes-mentor-sylvania-oh.myshopify.com | 146ms | 79ms | 24ms | 3rd |
| https://sylvaniaoh.clothesmentor.com/cdn/shopifycloud/perf-kit/shopify-perf-kit-3.11.0.min.js | 142ms | 127ms | 7ms | 1st |
| https://sylvaniaoh.clothesmentor.com/cdn/shop/t/21/assets/jquery-2.2.3.min.js?v=151226167428446066351792197794 | 74ms | 43ms | 17ms | 1st |
| https://sylvaniaoh.clothesmentor.com/cdn/shop/t/21/assets/global.js?v=24850326154503943211792197794 | 73ms | 29ms | 2ms | 1st |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.register_cLcgCW8c.esm.js | 51ms | 48ms | 0ms | 3rd |
FHTTP CachingActionNo cache headersFIX
HTTP Caching
ActionNo cache headers
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.
BJS Bundles166 scripts, 71 KB unusedREVIEW
JS Bundles
166 scripts, 71 KB unused
166 scripts, 71 KB unused
Warning::
https://sylvaniaoh.clothesmentor.com/cdn/wpm/b05c6...: 44 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.hextom.com/js/freeshippingbar.js?shop=...: 27 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 71 KB
71 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://sylvaniaoh.clothesmentor.com/cdn/wpm/b05c62d7ewbe538af9pdeb4fec1me339d55am.js | 83 KB | 44 KB (53%) | ✓ | 1st |
| https://cdn.hextom.com/js/freeshippingbar.js?shop=clothes-mentor-sylvania-oh.myshopify.com | 58 KB | 27 KB (47%) | ✓ | 3rd |
| https://sylvaniaoh.clothesmentor.com/cdn/shop/t/21/assets/global.js?v=24850326154503943211792197794 | 6 KB | — | ✓ | 1st |
| https://sylvaniaoh.clothesmentor.com/checkouts/internal/preloads.js?locale=en-US | 4 KB | — | ✓ | 1st |
| https://shop.app/checkouts/internal/preloads.js?locale=en-US&shop_id=26714308662 | 0 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/loader.init-shop-cart-sync.en.esm.js | 1 KB | — | ✓ | 3rd |
| https://sylvaniaoh.clothesmentor.com/cdn/shop/t/21/assets/jquery-2.2.3.min.js?v=151226167428446066351792197794 | 29 KB | — | ✓ | 1st |
| https://cdn.shopify.com/storefront/standard-actions.js | 5 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/client.init-shop-cart-sync_BYUfIraS.en.esm.js | 1 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.document_DMcRsBXN.esm.js | 1 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
CDocument CompressionActionDocument response served uncompressedREVIEW
Document Compression
ActionDocument response served uncompressed
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.
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
Main HTML Cache-Control
No Cache-Control header on main HTML response
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.
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
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.
CPage Weight InventoryAction267 resources · 2.2 MB · 71 KB savings availableREVIEW
Page Weight Inventory
Action267 resources · 2.2 MB · 71 KB savings available
267 resources · 2.2 MB · 71 KB savings available
Warning::
Page weight 2.2 MB exceeds 1 MB target by 1.2 MB
Got: 2.2 MB Expected: ≤ 1 MB
Info::
~71 KB of savings available
Info::
44 third-party resources (7% of weight)
267 resources · 2.2 MiB · 44 third-party 1.2 MiB over 1MB target
JavaScript 56% · 1.2 MiB
Image 33% · 734.1 KiB
Font 4% · 92.2 KiB
CSS 4% · 87.6 KiB
Document 2% · 52.1 KiB
Other 1% · 18.5 KiB
~71.0 KiB of savings available
Remove unused JavaScript: 71.0 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 267 resources | 2.2 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Third-Party Impact7% third-party, 0 ms blockingPASS
Third-Party Impact
7% third-party, 0 ms blocking
7% third-party, 0 ms blocking
Info::
Third-party code accounts for 7% of page weight (146.8 KiB of 2.2 MiB)
Info::
Third-party blocking time is low (0 ms)
93%
First-party Third-party
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
AImage Optimization28 images, 0 KB saveablePASS
Image Optimization
28 images, 0 KB saveable
28 images, 0 KB saveable
Warning::
https://cdn.shopify.com/s/files/1/0441/3580/9179/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
28 images 732 KB
0 oversized -0 KB
1 legacy format
1 missing dimensions CLS risk
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+Font Loading3 fonts (92 KB)PASS
Font Loading
3 fonts (92 KB)
3 fonts (92 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
92 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
cabin_n4.cefc6494a78f87... woff2 swap
Size 31 KB
Load time 41 ms
Start 547 ms
Risk FOUT — text flashes from fallback to web font
cabin_i4.d89c1b32b09ecb... woff2 swap
Size 31 KB
Load time 30 ms
Start 942 ms
Risk FOUT — text flashes from fallback to web font
cabin_n7.255204a342bfdb... woff2 swap
Size 30 KB
Load time 35 ms
Start 943 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+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource Hints162 hints, 0 missing preconnectsPASS
Resource Hints
162 hints, 0 missing preconnects
162 hints, 0 missing preconnects
Info::
1 URL(s) appear in multiple hints
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: //sylvaniaoh.clothesmentor.com/cdn/fonts/cabin/cabin_n4.cefc6494a78f87584a6f312fea532919154f66fe.woff2 (preload+preload).
Info::
Page uses 162 resource hint(s)
Current Resource Hints
preconnect 3
preload 2
dns-prefetch 1
prefetch
+146
156162 resource hints configured
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: //sylvaniaoh.clothesmentor.com/cdn/fonts/cabin/cabin_n4.cefc6494a78f87584a6f312fea532919154f66fe.woff2 (preload+preload).
Why this matters
Performance issues directly impact user engagement and conversion rates.
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
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+Asset CompressionAll 1 asset host use brotliPASS
Asset Compression
All 1 asset host use brotli
All 1 asset host use brotli
Info::
cdn.shopify.com serves assets with brotli (assets: 4)
Got: cdn.shopify.com (text/javascript)
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Server Response Intelligence1 server-response signal(s) detectedPASS
Server Response Intelligence
1 server-response signal(s) detected
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 ResourcesNo render-blocking resources detectedPASS
Render-Blocking Resources
No render-blocking resources detected
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+Third-Party ResourcesNo third-party resources detectedPASS
Third-Party Resources
No third-party resources detected
No third-party resources detected
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
JavaScript Blocking
1 JS blocking issue(s) detected
1 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.
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
CSS Performance Depth
1 CSS depth issue(s) detected
1 CSS depth issue(s) detected
Warning::
73 render-blocking stylesheet(s) -- recommended: <=3
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Network Waterfall267 requests over 6433msINFO
Network Waterfall
267 requests over 6433ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
6% of JavaScript execution is third-party
First-party Third-party 197ms · 73KB · €1/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cdn.hextom.com cdn.hextom.com | Other | 146ms | 58 KB | 47% | €1/mo | Optional |
cdn.shopify.com cdn.shopify.com | Other | 51ms | 14 KB | — | €0/mo | Optional |
cdn.hextom.com
Other
Execution 146ms
Transfer 58 KB
Unused 47%
Monthly Cost €1/mo
cdn.shopify.com
Other
Execution 51ms
Transfer 14 KB
Monthly Cost €0/mo
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-09-20 — 2026-10-17)
LCP (p75)
1527 ms
92% good
INP (p75)
126 ms
93% good
CLS (p75)
0.070
96% good
FCP (p75)
1135 ms
TTFB (p75)
557 ms
This origin passes Core Web Vitals assessment
Image Optimization42 images, 308 KB total, 7 KB wastedINFO
Image Optimization
42 images, 308 KB total, 7 KB wasted
Image Optimization Audit
Total Images
42
Total Size
308 KB
Oversized
1
Wasted
7 KB
1 missing dimensions 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.