https://www.mossandmolt.com
Performance
· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
88
GRADE
B
FIX
2
REVIEW
3
PASS
19
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
33
95
100
85
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
5.22 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
12.44 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
303 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.338
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
10.00 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.
12.65 s
Page Load Progression
Checks
2719 PASS 3 REVIEW 2 FIX
FPage Weight BudgetAction3.2 MB transferred, 455 requestsFIX
Page Weight Budget
Action3.2 MB transferred, 455 requests
3.2 MB transferred, 455 requests
Warning::
Page weighs 5.3 MB (3.2 MB transferred)
Warning::
Images are 1.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.0 MB
Warning::
JavaScript is 669 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 669 KB
Warning::
455 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.67 g CO2 per page load
3.2 MB transferred
455 requests
0.67 g CO2 per page load
Images 1.0 MiB 33%
Other 957.5 KiB 29%
JavaScript 669.0 KiB 20%
HTML 276.2 KiB 8%
CSS 97.4 KiB 3%
Fonts 77.8 KiB 2%
Other 58.8 KiB 2%
Other 41.4 KiB 1%
Other 25.9 KiB 1%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Why this matters
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Why this matters
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
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
FJS Execution CostAction8849ms total JS executionFIX
JS Execution Cost
Action8849ms total JS execution
8849ms total JS execution
Warning::
https://www.mossandmolt.com/: 5258ms CPU time
Warning::
Unattributable: 1316ms CPU time
Warning::
https://www.mossandmolt.com/cdn/wpm/b610a19cewf693...: 786ms CPU time
Warning::
https://cdn.shopify.com/extensions/01a187e4-859e-7...: 542ms CPU time
Info::
https://www.mossandmolt.com/cdn/shopifycloud/store...: 231ms CPU time
Info::
Third-party scripts: 999ms (11% of total)
Main Thread Breakdown
Style & Layout 34% Script Evaluation 31% Other 27% Parse HTML & CSS 3%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.mossandmolt.com/ | 5258ms | 913ms | 102ms | 1st |
| Unattributable | 1316ms | 84ms | 0ms | 1st |
| https://www.mossandmolt.com/cdn/wpm/b610a19cewf693d529pf324840bm6169d9b4m.js | 786ms | 492ms | 24ms | 1st |
| https://cdn.shopify.com/extensions/01a187e4-859e-754f-8799-894a6663f92b/judgeme-835/assets/loader.js | 542ms | 360ms | 1ms | 3rd |
| https://www.mossandmolt.com/cdn/shopifycloud/storefront/assets/storefront/remote_product_tracking-91d95044.js | 231ms | 147ms | 3ms | 1st |
| https://cdn.shopify.com/storefront/web-components/account.js | 179ms | 48ms | 0ms | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.register_oML0Hu4L.esm.js | 163ms | 115ms | 0ms | 3rd |
| https://www.mossandmolt.com/cdn/s/trekkie.storefront.188d9897a23fc8c6cfb5e02821b2b8baec7b147d.min.js | 154ms | 131ms | 11ms | 1st |
| https://www.mossandmolt.com/cdn/shopifycloud/perf-kit/shopify-perf-kit-3.14.0.min.js | 106ms | 97ms | 7ms | 1st |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.useEventListener_BeiI7eri.esm.js | 63ms | 59ms | 0ms | 3rd |
Showing top 10 of 11 scripts
CPage Weight InventoryAction455 resources · 3.2 MB · 36 KB savings availableREVIEW
Page Weight Inventory
Action455 resources · 3.2 MB · 36 KB savings available
455 resources · 3.2 MB · 36 KB savings available
Warning::
Page weight 3.2 MB exceeds 1 MB target by 2.2 MB
Got: 3.2 MB Expected: ≤ 1 MB
Info::
193 third-party resources (21% of weight)
Info::
1 resources over 200KB
455 resources · 3.2 MiB · 193 third-party 2.2 MiB over 1MB target
JavaScript 51% · 1.6 MiB
Image 33% · 1.0 MiB
Document 9% · 299.7 KiB
CSS 3% · 103.4 KiB
Font 2% · 77.8 KiB
Other 1% · 48.2 KiB
~36.3 KiB of savings available
Remove unused JavaScript: 36.3 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 455 resources | 3.2 MiB | ||||||
BCSS Performance Depth2 CSS depth issue(s) detectedREVIEW
CSS Performance Depth
2 CSS depth issue(s) detected
2 CSS depth issue(s) detected
Warning::
22 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.
Warning::
1 `@font-face` rule(s) without `font-display` -- causes FOIT
An `@font-face` rule without `font-display` causes Flash of Invisible Text (FOIT): the browser hides the styled text for up to 3 seconds while the custom font downloads, then either swaps to fallback (Chrome / Firefox) or stays invisible (older Safari). Add `font-display: swap` (shows fallback immediately, swaps in the custom font when ready) or `font-display: optional` (uses fallback if the font isn't ready in 100ms; never causes visible swap). Either eliminates FOIT outright.
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 |
AThird-Party Impact21% third-party, 0 ms blockingPASS
Third-Party Impact
21% third-party, 0 ms blocking
21% third-party, 0 ms blocking
Info::
Third-party code accounts for 21% of page weight (676.5 KiB of 3.2 MiB)
Info::
Third-party blocking time is low (0 ms)
79%
21%
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 Optimization36 images, 0 KB saveablePASS
Image Optimization
36 images, 0 KB saveable
36 images, 0 KB saveable
Info::
All images are well-optimized
36 images 1.0 MB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+Font Loading4 fonts (78 KB)PASS
Font Loading
4 fonts (78 KB)
4 fonts (78 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
78 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
mossmolt-jersey20.woff2 woff2 swap
Size 29 KB
Load time 29 ms
Start 169 ms
Risk FOUT — text flashes from fallback to web font
mossmolt-atkinson-700.w... woff2 swap
Size 24 KB
Load time 32 ms
Start 646 ms
Risk FOUT — text flashes from fallback to web font
mossmolt-atkinson-400.w... woff2 swap
Size 24 KB
Load time 31 ms
Start 648 ms
Risk FOUT — text flashes from fallback to web font
x-font-woff;charset=utf... woff swap
Size 1 KB
Load time 26 ms
Start 2.2 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
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 Bundles308 scripts, 36 KB unusedPASS
JS Bundles
308 scripts, 36 KB unused
308 scripts, 36 KB unused
Warning::
https://www.mossandmolt.com/cdn/wpm/b610a19cewf693...: 36 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 36 KB
36 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.mossandmolt.com/cdn/wpm/b610a19cewf693d529pf324840bm6169d9b4m.js | 84 KB | 36 KB (44%) | ✓ | 1st |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/standard-actions-override.js?v=171683365447094389611792123207 | 1 KB | — | ✓ | 1st |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/page-view-event.js?v=12823247316348680231792123205 | 1 KB | — | ✓ | 1st |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/utilities.js?v=128964188705738871001792123207 | 5 KB | — | ✓ | 1st |
| https://cdn.shopify.com/storefront/standard-events.js | 4 KB | — | ✓ | 3rd |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/component.js?v=175690430936884589731792123206 | 3 KB | — | ✓ | 1st |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/loader.init-shop-cart-sync.en.esm.js | 1 KB | — | ✓ | 3rd |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/header.js?v=146686092481561649561792123205 | 2 KB | — | ✓ | 1st |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/dialog.js?v=144816527575655702281792123207 | 2 KB | — | ✓ | 1st |
| https://cdn.shopify.com/storefront/standard-actions.js | 5 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 Hints216 hints, 0 missing preconnectsPASS
Resource Hints
216 hints, 0 missing preconnects
216 hints, 0 missing preconnects
Info::
Page uses 216 resource hint(s)
Current Resource Hints
preconnect 1
preload 2
dns-prefetch 4
prefetch
+199
209216 resource hints configured
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: 65)
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
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
JavaScript Blocking
1 JS blocking issue(s) detected
1 JS blocking issue(s) detected
Warning::
Total JS execution time is 8.8 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall455 requests over 6915msINFO
Network Waterfall
455 requests over 6915ms
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
11% of JavaScript execution is third-party
First-party Third-party 999ms · 32KB · €5/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cdn.shopify.com cdn.shopify.com | Other | 542ms | 4 KB | — | €3/mo | Costly |
cdn.shopify.com cdn.shopify.com | Other | 179ms | 10 KB | — | €1/mo | Optional |
cdn.shopify.com cdn.shopify.com | Other | 163ms | 15 KB | — | €1/mo | Optional |
cdn.shopify.com cdn.shopify.com | Other | 63ms | 1 KB | — | €0/mo | Optional |
cdn.shopify.com cdn.shopify.com | Other | 52ms | 1 KB | — | €0/mo | Optional |
cdn.shopify.com
Other
Execution 542ms
Transfer 4 KB
Monthly Cost €3/mo
cdn.shopify.com
Other
Execution 179ms
Transfer 10 KB
Monthly Cost €1/mo
cdn.shopify.com
Other
Execution 163ms
Transfer 15 KB
Monthly Cost €1/mo
cdn.shopify.com
Other
Execution 63ms
Transfer 1 KB
Monthly Cost €0/mo
cdn.shopify.com
Other
Execution 52ms
Transfer 1 KB
Monthly Cost €0/mo
These scripts may cost more than they're worth
- cdn.shopify.com adds 542ms and costs ~€3/month
cdn.shopify.com takes 542ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Image Optimization73 images, 1162 KB total, 0 KB wastedINFO
Image Optimization
73 images, 1162 KB total, 0 KB wasted
Image Optimization Audit
Total Images
73
Total Size
1162 KB
2 missing alt text 24 missing dimensions 5 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.