https://loopjc.myshopify.com
Performance
· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
93
GRADE
A
FIX
1
REVIEW
4
PASS
19
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
66
97
96
92
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
3.59 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.38 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
124 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.33 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.
7.39 s
Page Load Progression
Checks
2719 PASS 4 REVIEW 1 FIX
DJS Execution CostAction2611ms total JS executionFIX
JS Execution Cost
Action2611ms total JS execution
2611ms total JS execution
Warning::
Unattributable: 822ms CPU time
Warning::
https://loopjc.myshopify.com/: 783ms CPU time
Warning::
https://loopjc.myshopify.com/cdn/wpm/b264bf420w2e1...: 482ms CPU time
Info::
https://loopjc.myshopify.com/cdn/s/trekkie.storefr...: 181ms CPU time
Info::
https://loopjc.myshopify.com/cdn/shopifycloud/perf...: 130ms CPU time
Info::
Third-party scripts: 109ms (4% of total)
Main Thread Breakdown
Script Evaluation 41% Other 39% Style & Layout 14%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 822ms | 40ms | 0ms | 1st |
| https://loopjc.myshopify.com/ | 783ms | 98ms | 20ms | 1st |
| https://loopjc.myshopify.com/cdn/wpm/b264bf420w2e1681cap8d55857fm7d879f9cm.js | 482ms | 354ms | 30ms | 1st |
| https://loopjc.myshopify.com/cdn/s/trekkie.storefront.387430da5919a2f9b410f0ffaf5b70216a61abfb.min.js | 181ms | 165ms | 12ms | 1st |
| https://loopjc.myshopify.com/cdn/shopifycloud/perf-kit/shopify-perf-kit-3.11.0.min.js | 130ms | 87ms | 6ms | 1st |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.register_C2Sc-DlE.esm.js | 109ms | 104ms | 0ms | 3rd |
| https://loopjc.myshopify.com/cdn/shop/t/1/assets/global.js?v=54939145903281508041696011536 | 105ms | 11ms | 3ms | 1st |
CPage Weight BudgetAction1.7 MB transferred, 286 requestsREVIEW
Page Weight Budget
Action1.7 MB transferred, 286 requests
1.7 MB transferred, 286 requests
Info::
Page weighs 1.8 MB (1.7 MB transferred)
Warning::
286 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.36 g CO2 per page load
1.7 MB transferred
286 requests
0.36 g CO2 per page load
Other 1012.7 KiB 57%
JavaScript 330.4 KiB 19%
Images 174.6 KiB 10%
Fonts 138.0 KiB 8%
HTML 46.5 KiB 3%
CSS 42.6 KiB 2%
Other 10.8 KiB 1%
Other 7.6 KiB 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
CPage Weight InventoryAction286 resources · 1.7 MB · 38 KB savings availableREVIEW
Page Weight Inventory
Action286 resources · 1.7 MB · 38 KB savings available
286 resources · 1.7 MB · 38 KB savings available
Warning::
Page weight 1.7 MB exceeds 1 MB target by 739 KB
Got: 1.7 MB Expected: ≤ 1 MB
Info::
61 third-party resources (12% of weight)
286 resources · 1.7 MiB · 61 third-party 739.1 KiB over 1MB target
JavaScript 73% · 1.3 MiB
Image 10% · 174.6 KiB
Font 8% · 138.0 KiB
CSS 5% · 96.4 KiB
Document 3% · 51.8 KiB
Other 1% · 19.0 KiB
~38.4 KiB of savings available
Remove unused JavaScript: 38.4 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 286 resources | 1.7 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
BHTTP Cachingprivate, max-age=0, must-revalidateREVIEW
HTTP Caching
private, max-age=0, must-revalidate
private, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: private, max-age=0, must-revalidate
Info::
ETag present — enables conditional (304) responses
Cache-Control
private, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
A+Third-Party Impact12% third-party, 0 ms blockingPASS
Third-Party Impact
12% third-party, 0 ms blocking
12% third-party, 0 ms blocking
Info::
Third-party code accounts for 12% of page weight (212.7 KiB of 1.7 MiB)
Info::
Third-party blocking time is low (0 ms)
88%
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.
A+Image Optimization8 images, 0 KB saveablePASS
Image Optimization
8 images, 0 KB saveable
8 images, 0 KB saveable
Info::
All images are well-optimized
8 images 175 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+Font Loading3 fonts (138 KB)PASS
Font Loading
3 fonts (138 KB)
3 fonts (138 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
138 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
assistant_n4.9120912a46... woff2 swap
Size 13 KB
Load time 42 ms
Start 224 ms
Risk FOUT — text flashes from fallback to web font
GTStandard-MSemibold.woff2 woff2 swap
Size 63 KB
Load time 53 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
GTStandard-MRegular.woff2 woff2 swap
Size 62 KB
Load time 47 ms
Start 1.1 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+JS Bundles195 scripts, 38 KB unusedPASS
JS Bundles
195 scripts, 38 KB unused
195 scripts, 38 KB unused
Warning::
https://loopjc.myshopify.com/cdn/wpm/b264bf420w2e1...: 38 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 38 KB
38 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://loopjc.myshopify.com/cdn/wpm/b264bf420w2e1681cap8d55857fm7d879f9cm.js | 85 KB | 38 KB (46%) | ✓ | 1st |
| https://loopjc.myshopify.com/cdn/shop/t/1/assets/constants.js?v=58251544750838685771696011534 | 1 KB | — | ✓ | 1st |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/loader.init-shop-cart-sync.en.esm.js | 1 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/loader.shop-follow-button.en.esm.js | 1 KB | — | ✓ | 3rd |
| 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_CywFbEu-.en.esm.js | 1 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.document_DMcRsBXN.esm.js | 1 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.window_CAbVMZox.esm.js | 1 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.init_DgfSYtmo.esm.js | 1 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.register_C2Sc-DlE.esm.js | 15 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
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 Hints178 hints, 0 missing preconnectsPASS
Resource Hints
178 hints, 0 missing preconnects
178 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: //loopjc.myshopify.com/cdn/fonts/assistant/assistant_n4.9120912a469cad1cc292572851508ca49d12e768.woff2 (preload+preload).
Info::
Page uses 178 resource hint(s)
Current Resource Hints
preconnect 2
preload 2
dns-prefetch 1
prefetch
+163
173178 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: //loopjc.myshopify.com/cdn/fonts/assistant/assistant_n4.9120912a469cad1cc292572851508ca49d12e768.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+Document CompressionDocument response uses brotliPASS
Document Compression
Document response uses brotli
Document response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
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+Main HTML Cache-ControlMain HTML max-age=0 (≤ 5min) is appropriatePASS
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: private, max-age=0, must-revalidate
A+Server-Timing Observability18 Server-Timing entries advertisedPASS
Server-Timing Observability
18 Server-Timing entries advertised
18 Server-Timing entries advertised
Info::
Server-Timing header advertises 18 timing entries
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: accept-encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
`ETag` present -- conditional GET supported
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
A+JavaScript BlockingNo render-blocking JS or document.write usage detectedPASS
JavaScript Blocking
No render-blocking JS or document.write usage detected
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
CSS Performance Depth
1 CSS depth issue(s) detected
1 CSS depth issue(s) detected
Warning::
37 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 Waterfall286 requests over 6382msINFO
Network Waterfall
286 requests over 6382ms
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
4% of JavaScript execution is third-party
First-party Third-party 109ms · 15KB · €1/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cdn.shopify.com cdn.shopify.com | Other | 109ms | 15 KB | — | €1/mo | Optional |
cdn.shopify.com
Other
Execution 109ms
Transfer 15 KB
Monthly Cost €1/mo
Image Optimization8 images, 154 KB total, 0 KB wastedINFO
Image Optimization
8 images, 154 KB total, 0 KB wasted
Image Optimization Audit
Total Images
8
Total Size
154 KB
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.