http://mossandmolt.com
Performance
· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
83
GRADE
B
FIX
5
REVIEW
4
PASS
15
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
40
95
81
85
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
3.99 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.96 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
621 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.125
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
9.14 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.
11.88 s
Page Load Progression
Checks
2715 PASS 4 REVIEW 5 FIX
FPage Weight BudgetAction3.2 MB transferred, 484 requestsFIX
Page Weight Budget
Action3.2 MB transferred, 484 requests
3.2 MB transferred, 484 requests
Warning::
Page weighs 5.4 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 618 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 618 KB
Warning::
484 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.68 g CO2 per page load
3.2 MB transferred
484 requests
0.68 g CO2 per page load
Images 1.0 MiB 32%
Other 1.0 MiB 31%
JavaScript 617.6 KiB 19%
HTML 271.5 KiB 8%
Fonts 156.8 KiB 5%
Other 56.8 KiB 2%
Other 43.0 KiB 1%
CSS 36.8 KiB 1%
Other 25.8 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
Third-Party Impact
Action100% third-party, 0 ms blocking
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (3.2 MiB of 3.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
FJS Execution CostAction9990ms total JS executionFIX
JS Execution Cost
Action9990ms total JS execution
9990ms total JS execution
Warning::
https://www.mossandmolt.com/: 5962ms CPU time
Warning::
Unattributable: 1419ms CPU time
Warning::
https://www.mossandmolt.com/cdn/wpm/b610a19cewf693...: 890ms CPU time
Warning::
https://cdn.shopify.com/extensions/01a18ca5-76ee-7...: 563ms CPU time
Warning::
https://www.mossandmolt.com/cdn/shopifycloud/store...: 327ms CPU time
Warning::
Third-party scripts: 8571ms (86% of total)
Main Thread Breakdown
Style & Layout 32% Script Evaluation 30% Other 28% Rendering 3%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.mossandmolt.com/ | 5962ms | 1017ms | 128ms | 3rd |
| Unattributable | 1419ms | 103ms | 0ms | 1st |
| https://www.mossandmolt.com/cdn/wpm/b610a19cewf693d529pf324840bm6169d9b4m.js | 890ms | 610ms | 25ms | 3rd |
| https://cdn.shopify.com/extensions/01a18ca5-76ee-70c3-8269-2325a029d88c/judgeme-837/assets/loader.js | 563ms | 306ms | 1ms | 3rd |
| https://www.mossandmolt.com/cdn/shopifycloud/storefront/assets/storefront/remote_product_tracking-91d95044.js | 327ms | 153ms | 5ms | 3rd |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.register_oML0Hu4L.esm.js | 159ms | 117ms | 0ms | 3rd |
| https://cdn.shopify.com/storefront/web-components/account.js | 158ms | 40ms | 0ms | 3rd |
| https://www.mossandmolt.com/cdn/s/trekkie.storefront.188d9897a23fc8c6cfb5e02821b2b8baec7b147d.min.js | 150ms | 131ms | 11ms | 3rd |
| https://www.mossandmolt.com/cdn/shopifycloud/perf-kit/shopify-perf-kit-3.14.0.min.js | 131ms | 118ms | 9ms | 3rd |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/mm-oct15-nav.js?v=91044619401207257071793330900 | 69ms | 29ms | 2ms | 3rd |
Showing top 10 of 13 scripts
DPage Weight InventoryAction484 resources · 3.2 MB · 36 KB savings availableFIX
Page Weight Inventory
Action484 resources · 3.2 MB · 36 KB savings available
484 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
Warning::
482 third-party resources (100% of weight)
Info::
1 resources over 200KB
484 resources · 3.2 MiB · 482 third-party 2.2 MiB over 1MB target
JavaScript 51% · 1.7 MiB
Image 32% · 1.0 MiB
Document 9% · 291.4 KiB
Font 5% · 156.8 KiB
Other 2% · 54.8 KiB
CSS 1% · 42.0 KiB
~36.3 KiB of savings available
Remove unused JavaScript: 36.3 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 484 resources | 3.2 MiB | ||||||
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.
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.
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.
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 Loading6 fonts (157 KB)PASS
Font Loading
6 fonts (157 KB)
6 fonts (157 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
157 KB total
Render-blocking
0
of 6
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 34 ms
Start 588 ms
Risk FOUT — text flashes from fallback to web font
inter_n5.d7101d5e168594... woff2 swap
Size 40 KB
Load time 70 ms
Start 838 ms
Risk FOUT — text flashes from fallback to web font
inter_n7.02711e6b374660... woff2 swap
Size 39 KB
Load time 59 ms
Start 838 ms
Risk FOUT — text flashes from fallback to web font
mossmolt-atkinson-700.w... woff2 swap
Size 24 KB
Load time 30 ms
Start 986 ms
Risk FOUT — text flashes from fallback to web font
mossmolt-atkinson-400.w... woff2 swap
Size 24 KB
Load time 35 ms
Start 988 ms
Risk FOUT — text flashes from fallback to web font
x-font-woff;charset=utf... woff swap
Size 1 KB
Load time 28 ms
Start 3.0 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 Bundles334 scripts, 36 KB unusedPASS
JS Bundles
334 scripts, 36 KB unused
334 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%) | ✓ | 3rd |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/standard-actions-override.js?v=171683365447094389611792123207 | 1 KB | — | ✓ | 3rd |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/page-view-event.js?v=12823247316348680231792123205 | 1 KB | — | ✓ | 3rd |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/utilities.js?v=128964188705738871001792123207 | 5 KB | — | ✓ | 3rd |
| https://cdn.shopify.com/storefront/standard-events.js | 3 KB | — | ✓ | 3rd |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/component.js?v=175690430936884589731792123206 | 3 KB | — | ✓ | 3rd |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/section-renderer.js?v=165897709872489896681792123206 | 2 KB | — | ✓ | 3rd |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/section-hydration.js?v=108434990705342316311792123206 | 1 KB | — | ✓ | 3rd |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/morph.js?v=163551064521986254391792123207 | 4 KB | — | ✓ | 3rd |
| https://www.mossandmolt.com/cdn/shop/t/18/assets/focus.js?v=60436577539430446401792123206 | 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 Hints217 hints, 0 missing preconnectsPASS
Resource Hints
217 hints, 0 missing preconnects
217 hints, 0 missing preconnects
Info::
Page uses 217 resource hint(s)
Current Resource Hints
preconnect 1
preload 2
dns-prefetch 4
prefetch
+200
210217 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+Asset CompressionAll 2 asset hosts use brotliPASS
Asset Compression
All 2 asset hosts use brotli
All 2 asset hosts use brotli
Info::
www.mossandmolt.com serves assets with brotli (assets: 120)
Got: www.mossandmolt.com (text/javascript)
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+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::
Total JS execution time is 10.0 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 Waterfall484 requests over 8050msINFO
Network Waterfall
484 requests over 8050ms
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
86% of JavaScript execution is third-party
First-party Third-party 8571ms · 415KB · €45/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.mossandmolt.com www.mossandmolt.com | Other | 5962ms | 211 KB | — | €32/mo | Costly |
www.mossandmolt.com www.mossandmolt.com | Other | 890ms | 84 KB | 44% | €5/mo | Costly |
cdn.shopify.com cdn.shopify.com | Other | 563ms | 3 KB | — | €3/mo | Costly |
www.mossandmolt.com www.mossandmolt.com | Other | 327ms | 9 KB | — | €2/mo | Costly |
cdn.shopify.com cdn.shopify.com | Other | 159ms | 15 KB | — | €1/mo | Optional |
cdn.shopify.com cdn.shopify.com | Other | 158ms | 10 KB | — | €1/mo | Optional |
www.mossandmolt.com www.mossandmolt.com | Other | 150ms | 31 KB | — | €1/mo | Optional |
www.mossandmolt.com www.mossandmolt.com | Other | 131ms | 27 KB | — | €1/mo | Optional |
www.mossandmolt.com www.mossandmolt.com | Other | 69ms | 5 KB | — | €0/mo | Optional |
cdn.shopify.com cdn.shopify.com | Other | 58ms | 0 KB | — | €0/mo | Optional |
www.mossandmolt.com www.mossandmolt.com | Other | 53ms | 20 KB | — | €0/mo | Optional |
cdn.shopify.com cdn.shopify.com | Other | 51ms | 1 KB | — | €0/mo | Optional |
www.mossandmolt.com
Other
Execution 5962ms
Transfer 211 KB
Monthly Cost €32/mo
www.mossandmolt.com
Other
Execution 890ms
Transfer 84 KB
Unused 44%
Monthly Cost €5/mo
cdn.shopify.com
Other
Execution 563ms
Transfer 3 KB
Monthly Cost €3/mo
www.mossandmolt.com
Other
Execution 327ms
Transfer 9 KB
Monthly Cost €2/mo
cdn.shopify.com
Other
Execution 159ms
Transfer 15 KB
Monthly Cost €1/mo
cdn.shopify.com
Other
Execution 158ms
Transfer 10 KB
Monthly Cost €1/mo
www.mossandmolt.com
Other
Execution 150ms
Transfer 31 KB
Monthly Cost €1/mo
www.mossandmolt.com
Other
Execution 131ms
Transfer 27 KB
Monthly Cost €1/mo
www.mossandmolt.com
Other
Execution 69ms
Transfer 5 KB
Monthly Cost €0/mo
cdn.shopify.com
Other
Execution 58ms
Transfer 0 KB
Monthly Cost €0/mo
www.mossandmolt.com
Other
Execution 53ms
Transfer 20 KB
Monthly Cost €0/mo
cdn.shopify.com
Other
Execution 51ms
Transfer 1 KB
Monthly Cost €0/mo
These scripts may cost more than they're worth
- www.mossandmolt.com adds 5962ms and costs ~€32/month
- www.mossandmolt.com adds 890ms and costs ~€5/month
- cdn.shopify.com adds 563ms and costs ~€3/month
- www.mossandmolt.com adds 327ms and costs ~€2/month
86% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
Why this matters
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
www.mossandmolt.com takes 5962ms 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
www.mossandmolt.com takes 890ms 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
cdn.shopify.com takes 563ms 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
www.mossandmolt.com takes 327ms 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.