Performance

· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop

Performance

Accessibility

100

Best Practices

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

753 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.73 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

5 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.085

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

3.55 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.

2.33 s

Page Load Progression

1.2 s

2.5 s

3.7 s

4.9 s

6.2 s

7.4 s

8.7 s

9.9 s

Checks

16 PASS 2 REVIEW 2 FIX

Page Weight Budget

Action

4.2 MB transferred, 486 requests

FIX

4.2 MB transferred, 486 requests

Page weighs 6.4 MB (4.2 MB transferred)

Images are 1.9 MB — compress or use modern formats

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Got: 1.9 MB

JavaScript is 672 KB — consider code splitting or lazy loading

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Got: 672 KB

486 HTTP requests — consider bundling or reducing

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Estimated 0.89 g CO2 per page load

4.2 MB transferred

486 requests

0.89 g CO2 per page load

Images 1.9 MiB 46%

Other 1021.6 KiB 24%

JavaScript 671.8 KiB 16%

HTML 277.8 KiB 6%

Fonts 141.9 KiB 3%

CSS 97.6 KiB 2%

Other 58.8 KiB 1%

Other 52.5 KiB 1%

Other 26.2 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

JS Execution Cost

Action

6472ms total JS execution

FIX

6472ms total JS execution

https://www.mossandmolt.com/: 5395ms CPU time

Unattributable: 391ms CPU time

https://www.mossandmolt.com/cdn/wpm/b56a6403cw68ea...: 247ms CPU time

https://cdn.shopify.com/extensions/01a187e4-859e-7...: 183ms CPU time

https://www.mossandmolt.com/cdn/shopifycloud/store...: 72ms CPU time

Third-party scripts: 298ms (5% of total)

Main Thread Breakdown

Style & Layout 67% Other 14% Script Evaluation 13% Rendering 3%

Script	Total	Scripting	Parse/Compile	Party
https://www.mossandmolt.com/	5395ms	287ms	26ms	1st
Unattributable	391ms	27ms	0ms	1st
https://www.mossandmolt.com/cdn/wpm/b56a6403cw68eaaf33p29d38119m7a4be5cam.js	247ms	148ms	5ms	1st
https://cdn.shopify.com/extensions/01a187e4-859e-754f-8799-894a6663f92b/judgeme-835/assets/loader.js	183ms	83ms	0ms	3rd
https://www.mossandmolt.com/cdn/shopifycloud/storefront/assets/storefront/remote_product_tracking-91d95044.js	72ms	43ms	1ms	1st
https://www.mossandmolt.com/cdn/shop/t/18/compiled_assets/snippet-scripts.js?v=103469801446076426471792547535	69ms	4ms	0ms	1st
https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.register_oML0Hu4L.esm.js	63ms	35ms	0ms	3rd
https://cdn.shopify.com/storefront/web-components/account.js	52ms	12ms	0ms	3rd

Page Weight Inventory

Action

486 resources · 4.2 MB · 36 KB savings available

REVIEW

486 resources · 4.2 MB · 36 KB savings available

Page weight 4.2 MB exceeds 1 MB target by 3.2 MB

Got: 4.2 MB Expected: ≤ 1 MB

198 third-party resources (18% of weight)

4 resources over 200KB

486 resources · 4.2 MiB · 198 third-party 3.2 MiB over 1MB target

Image 46% · 1.9 MiB

JavaScript 40% · 1.7 MiB

Document 7% · 301.5 KiB

Font 3% · 141.9 KiB

CSS 2% · 103.5 KiB

Other 1% · 59.5 KiB

~36.1 KiB of savings available

Remove unused JavaScript: 36.1 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

486 resources			4.2 MiB

HTTP Caching

private, max-age=0, must-revalidate

REVIEW

private, max-age=0, must-revalidate

Cache-Control header is set

Got: private, max-age=0, must-revalidate

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 Impact

18% third-party, 0 ms blocking

PASS

18% third-party, 0 ms blocking

Third-party code accounts for 18% of page weight (789.4 KiB of 4.2 MiB)

Third-party blocking time is low (0 ms)

82%

18%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

Image Optimization

43 images, 0 KB saveable

PASS

43 images, 0 KB saveable

All images are well-optimized

43 images 1.9 MB

0 oversized -0 KB

2 legacy format

0 missing dimensions CLS risk

A+

Font Loading

7 fonts (142 KB)

PASS

7 fonts (142 KB)

7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

142 KB total

Render-blocking

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

inter_n5.d7101d5e168594... woff2 swap

Size 0 KB

Load time 2 ms

Start 314 ms