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.

725 ms

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

1.39 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.

0.085

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

3.24 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.

1.39 s

Page Load Progression

1.1 s

2.3 s

3.4 s

4.6 s

5.7 s

6.9 s

8.0 s

9.1 s

Checks

16 PASS 2 REVIEW 2 FIX

Page Weight Budget

Action

4.1 MB transferred, 464 requests

FIX

4.1 MB transferred, 464 requests

Page weighs 6.2 MB (4.1 MB transferred)

Images are 1.8 MB — compress or use modern formats

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

Got: 1.8 MB

JavaScript is 622 KB — consider code splitting or lazy loading

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

Got: 622 KB

Fonts are 220 KB — consider subsetting or using system fonts

Subset fonts to include only used characters, or switch to system font stacks.

Got: 220 KB

464 HTTP requests — consider bundling or reducing

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

Estimated 0.85 g CO2 per page load

4.1 MB transferred

464 requests

0.85 g CO2 per page load

Images 1.8 MiB 44%

Other 1006.8 KiB 24%

JavaScript 621.7 KiB 15%

HTML 275.4 KiB 7%

Fonts 219.8 KiB 5%

CSS 96.1 KiB 2%

Other 56.7 KiB 1%

Other 45.8 KiB 1%

Other 12.2 KiB 0%

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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

5850ms total JS execution

FIX

5850ms total JS execution

https://www.mossandmolt.com/: 4893ms CPU time

Unattributable: 375ms CPU time

https://www.mossandmolt.com/cdn/wpm/b78841ebdw6fd1...: 217ms CPU time

https://cdn.shopify.com/extensions/01a18241-b12a-7...: 169ms CPU time

https://cdn.shopify.com/storefront/web-components/...: 82ms CPU time

Third-party scripts: 307ms (5% of total)

Main Thread Breakdown

Style & Layout 67% Other 15% Script Evaluation 13% Rendering 3%

Script	Total	Scripting	Parse/Compile	Party
https://www.mossandmolt.com/	4893ms	267ms	29ms	1st
Unattributable	375ms	20ms	0ms	1st
https://www.mossandmolt.com/cdn/wpm/b78841ebdw6fd1eda2peb7ac126m6aaa99abm.js	217ms	129ms	5ms	1st
https://cdn.shopify.com/extensions/01a18241-b12a-793d-aab3-0689dd4e6842/judgeme-833/assets/loader.js	169ms	81ms	0ms	3rd
https://cdn.shopify.com/storefront/web-components/account.js	82ms	10ms	0ms	3rd
https://www.mossandmolt.com/cdn/shop/t/18/compiled_assets/snippet-scripts.js?v=103469801446076426471792547535	58ms	5ms	0ms	1st
https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.register_BsQ6fabn.esm.js	55ms	31ms	0ms	3rd

Page Weight Inventory

Action

464 resources · 4.1 MB · 39 KB savings available

REVIEW

464 resources · 4.1 MB · 39 KB savings available

Page weight 4.1 MB exceeds 1 MB target by 3.1 MB

Got: 4.1 MB Expected: ≤ 1 MB

194 third-party resources (17% of weight)

2 resources over 200KB

464 resources · 4.1 MiB · 194 third-party 3.1 MiB over 1MB target

Image 44% · 1.8 MiB

JavaScript 40% · 1.6 MiB

Document 7% · 298.1 KiB

Font 5% · 219.8 KiB

CSS 2% · 101.4 KiB

Other 1% · 39.9 KiB

~39.2 KiB of savings available

Remove unused JavaScript: 39.2 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

464 resources			4.1 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

17% third-party, 0 ms blocking

PASS

17% third-party, 0 ms blocking

Third-party code accounts for 17% of page weight (711.4 KiB of 4.1 MiB)

Third-party blocking time is low (0 ms)

83%

17%

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 1.8 MB

0 oversized -0 KB

2 legacy format

0 missing dimensions CLS risk

A+

Font Loading

7 fonts (220 KB)

PASS

7 fonts (220 KB)

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

Web fonts

220 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 40 KB

Load time 39 ms

Start 287 ms