https://loopjc.myshopify.com
Performance
· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
93
GRADE
A
FIX
0
REVIEW
5
PASS
15
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
98
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.
604 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.03 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.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
865 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
1.04 s
Page Load Progression
Checks
2215 PASS 5 REVIEW
CPage Weight BudgetAction1.8 MB transferred, 260 requestsREVIEW
Page Weight Budget
Action1.8 MB transferred, 260 requests
1.8 MB transferred, 260 requests
Info::
Page weighs 1.9 MB (1.8 MB transferred)
Warning::
260 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.37 g CO2 per page load
1.8 MB transferred
260 requests
0.37 g CO2 per page load
Other 957.9 KiB 53%
JavaScript 329.2 KiB 18%
Images 285.7 KiB 16%
Fonts 138.0 KiB 8%
HTML 46.5 KiB 3%
CSS 43.0 KiB 2%
Other 10.9 KiB 1%
Other 6.8 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
BJS Execution Cost520ms total JS executionREVIEW
JS Execution Cost
520ms total JS execution
520ms total JS execution
Info::
https://loopjc.myshopify.com/: 226ms CPU time
Info::
Unattributable: 214ms CPU time
Info::
https://loopjc.myshopify.com/cdn/wpm/b264bf420w2e1...: 80ms CPU time
Main Thread Breakdown
Other 40% Script Evaluation 38% Style & Layout 14%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://loopjc.myshopify.com/ | 226ms | 29ms | 6ms | 1st |
| Unattributable | 214ms | 7ms | 0ms | 1st |
| https://loopjc.myshopify.com/cdn/wpm/b264bf420w2e1681cap8d55857fm7d879f9cm.js | 80ms | 58ms | 5ms | 1st |
CPage Weight InventoryAction260 resources · 1.8 MB · 41 KB savings availableREVIEW
Page Weight Inventory
Action260 resources · 1.8 MB · 41 KB savings available
260 resources · 1.8 MB · 41 KB savings available
Warning::
Page weight 1.8 MB exceeds 1 MB target by 794 KB
Got: 1.8 MB Expected: ≤ 1 MB
Info::
59 third-party resources (12% of weight)
260 resources · 1.8 MiB · 59 third-party 794.0 KiB over 1MB target
JavaScript 70% · 1.3 MiB
Image 16% · 285.7 KiB
Font 8% · 138.0 KiB
Document 3% · 51.8 KiB
CSS 2% · 43.0 KiB
Other 1% · 18.3 KiB
~41.1 KiB of savings available
Remove unused JavaScript: 41.1 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 260 resources | 1.8 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 (213.8 KiB of 1.8 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 286 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 38 ms
Start 277 ms
Risk FOUT — text flashes from fallback to web font
GTStandard-MSemibold.woff2 woff2 swap
Size 63 KB
Load time 55 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
GTStandard-MRegular.woff2 woff2 swap
Size 62 KB
Load time 55 ms
Start 1.0 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 Bundles193 scripts, 41 KB unusedPASS
JS Bundles
193 scripts, 41 KB unused
193 scripts, 41 KB unused
Warning::
https://loopjc.myshopify.com/cdn/wpm/b264bf420w2e1...: 41 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 41 KB
41 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 | 41 KB (49%) | ✓ | 1st |
| https://loopjc.myshopify.com/cdn/shop/t/1/assets/constants.js?v=58251544750838685771696011534 | 1 KB | — | ✓ | 1st |
| https://loopjc.myshopify.com/cdn/shop/t/1/assets/pubsub.js?v=158357773527763999511696011541 | 1 KB | — | ✓ | 1st |
| https://loopjc.myshopify.com/cdn/shop/t/1/assets/global.js?v=54939145903281508041696011536 | 8 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 |
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 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+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
Network Waterfall260 requests over 5524msINFO
Network Waterfall
260 requests over 5524ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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.