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.

749 ms

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

1.65 s

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

8 ms

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

0.075

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

3.09 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.

2.49 s

Page Load Progression

1.0 s

2.1 s

3.1 s

4.1 s

5.1 s

6.2 s

7.2 s

8.2 s

Checks

16 PASS 2 REVIEW 2 FIX

Page Weight Budget

Action

3.9 MB transferred, 446 requests

FIX

3.9 MB transferred, 446 requests

Page weighs 6.1 MB (3.9 MB transferred)

Images are 1.6 MB — compress or use modern formats

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

Got: 1.6 MB

JavaScript is 677 KB — consider code splitting or lazy loading

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

Got: 677 KB

446 HTTP requests — consider bundling or reducing

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

Estimated 0.81 g CO2 per page load

3.9 MB transferred

446 requests

0.81 g CO2 per page load

Images 1.6 MiB 43%

Other 948.4 KiB 24%

JavaScript 677.5 KiB 17%

HTML 276.3 KiB 7%

Fonts 141.9 KiB 4%

CSS 97.8 KiB 2%

Other 58.8 KiB 1%

Other 49.6 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

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

5190ms total JS execution

FIX

5190ms total JS execution

https://www.mossandmolt.com/: 4359ms CPU time

Unattributable: 339ms CPU time

https://www.mossandmolt.com/cdn/wpm/b264bf420w2e16...: 196ms CPU time

https://cdn.shopify.com/extensions/01a18241-b12a-7...: 175ms CPU time

https://cdn.shopify.com/shopifycloud/shop-js/modul...: 61ms CPU time

Third-party scripts: 296ms (6% of total)

Main Thread Breakdown

Style & Layout 66% Other 15% Script Evaluation 13% Rendering 3%

Script	Total	Scripting	Parse/Compile	Party
https://www.mossandmolt.com/	4359ms	243ms	28ms	1st
Unattributable	339ms	26ms	0ms	1st
https://www.mossandmolt.com/cdn/wpm/b264bf420w2e1681cap8d55857fm7d879f9cm.js	196ms	105ms	7ms	1st
https://cdn.shopify.com/extensions/01a18241-b12a-793d-aab3-0689dd4e6842/judgeme-833/assets/loader.js	175ms	84ms	0ms	3rd
https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.register_C2Sc-DlE.esm.js	61ms	32ms	0ms	3rd
https://cdn.shopify.com/storefront/web-components/account.js	60ms	16ms	0ms	3rd

Page Weight Inventory

Action

446 resources · 3.9 MB · 39 KB savings available

REVIEW

446 resources · 3.9 MB · 39 KB savings available

Page weight 3.9 MB exceeds 1 MB target by 2.9 MB

Got: 3.9 MB Expected: ≤ 1 MB

197 third-party resources (20% of weight)

2 resources over 200KB

446 resources · 3.9 MiB · 197 third-party 2.9 MiB over 1MB target

Image 43% · 1.7 MiB

JavaScript 42% · 1.6 MiB

Document 8% · 299.7 KiB

Font 4% · 141.9 KiB

CSS 3% · 103.8 KiB

Other 1% · 43.1 KiB

~39.3 KiB of savings available

Remove unused JavaScript: 39.3 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

446 resources			3.9 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

Third-Party Impact

20% third-party, 0 ms blocking

PASS

20% third-party, 0 ms blocking

Third-party code accounts for 20% of page weight (792.4 KiB of 3.9 MiB)

Third-party blocking time is low (0 ms)

80%

20%

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

42 images, 0 KB saveable

PASS

42 images, 0 KB saveable

All images are well-optimized

42 images 1.6 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 1 ms

Start 259 ms