https://sylvaniaoh.clothesmentor.com
Performance
· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
87
GRADE
B
FIX
2
REVIEW
7
PASS
11
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
94
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.
654 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.54 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.
0.033
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.09 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.
1.57 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
2311 PASS 7 REVIEW 2 FIX
DPage Weight BudgetAction2.2 MB transferred, 203 requestsFIX
Page Weight Budget
Action2.2 MB transferred, 203 requests
2.2 MB transferred, 203 requests
Info::
Page weighs 2.7 MB (2.2 MB transferred)
Warning::
203 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
203 requests
0.46 g CO2 per page load
Images 994.6 KiB 44%
Other 656.0 KiB 29%
JavaScript 372.5 KiB 17%
Fonts 92.2 KiB 4%
CSS 57.7 KiB 3%
HTML 47.0 KiB 2%
Other 10.5 KiB 0%
Other 6.9 KiB 0%
Other 912 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
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 Execution Cost619ms total JS executionREVIEW
JS Execution Cost
619ms total JS execution
619ms total JS execution
Warning::
https://sylvaniaoh.clothesmentor.com/: 281ms CPU time
Warning::
Unattributable: 263ms CPU time
Info::
https://sylvaniaoh.clothesmentor.com/cdn/wpm/b05c6...: 74ms CPU time
Main Thread Breakdown
Other 37% Script Evaluation 37% Style & Layout 14% Parse HTML & CSS 5% Rendering 4% Script Parsing & Compilation 4%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://sylvaniaoh.clothesmentor.com/ | 281ms | 44ms | 8ms | 1st |
| Unattributable | 263ms | 10ms | 0ms | 1st |
| https://sylvaniaoh.clothesmentor.com/cdn/wpm/b05c62d7ewbe538af9pdeb4fec1me339d55am.js | 74ms | 47ms | 6ms | 1st |
BJS Bundles100 scripts, 72 KB unusedREVIEW
JS Bundles
100 scripts, 72 KB unused
100 scripts, 72 KB unused
Warning::
https://sylvaniaoh.clothesmentor.com/cdn/wpm/b05c6...: 45 KB unused (54%)
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: 72 KB
72 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 | 45 KB (54%) | ✓ | 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 | 7 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 InventoryAction203 resources · 2.2 MB · 72 KB savings availableREVIEW
Page Weight Inventory
Action203 resources · 2.2 MB · 72 KB savings available
203 resources · 2.2 MB · 72 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::
~72 KB of savings available
Info::
45 third-party resources (7% of weight)
203 resources · 2.2 MiB · 45 third-party 1.2 MiB over 1MB target
JavaScript 46% · 1020.9 KiB
Image 45% · 997.0 KiB
Font 4% · 92.2 KiB
CSS 3% · 57.7 KiB
Document 2% · 52.4 KiB
Other 1% · 18.3 KiB
~71.5 KiB of savings available
Remove unused JavaScript: 71.5 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 203 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 Optimization33 images, 0 KB saveablePASS
Image Optimization
33 images, 0 KB saveable
33 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.
33 images 995 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 77 ms
Start 429 ms
Risk FOUT — text flashes from fallback to web font
cabin_n7.255204a342bfdb... woff2 swap
Size 30 KB
Load time 63 ms
Start 745 ms
Risk FOUT — text flashes from fallback to web font
cabin_i4.d89c1b32b09ecb... woff2 swap
Size 31 KB
Load time 64 ms
Start 745 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 HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
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.
Network Waterfall203 requests over 4398msINFO
Network Waterfall
203 requests over 4398ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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.