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.

704 ms

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

1.29 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.

0.084

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

3.02 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.

1.29 s

Page Load Progression

894 ms

1.8 s

2.7 s

3.6 s

4.5 s

5.4 s

6.3 s

7.2 s

Checks

16 PASS 2 REVIEW 2 FIX

Page Weight Budget

Action

3.7 MB transferred, 425 requests

FIX

3.7 MB transferred, 425 requests

Page weighs 6.1 MB (3.7 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 676 KB — consider code splitting or lazy loading

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

Got: 676 KB

425 HTTP requests — consider bundling or reducing

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

Estimated 0.78 g CO2 per page load

3.7 MB transferred

425 requests

0.78 g CO2 per page load

Images 1.6 MiB 44%

Other 843.0 KiB 22%

JavaScript 675.7 KiB 18%

HTML 276.4 KiB 7%

Fonts 141.9 KiB 4%

Other 58.8 KiB 2%

Other 52.1 KiB 1%

CSS 49.8 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

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

4433ms total JS execution

FIX

4433ms total JS execution

https://www.mossandmolt.com/: 3658ms CPU time

Unattributable: 330ms CPU time

https://cdn.shopify.com/extensions/01a18241-b12a-7...: 164ms CPU time

https://www.mossandmolt.com/cdn/wpm/b264bf420w2e16...: 163ms CPU time

https://cdn.shopify.com/shopifycloud/shop-js/modul...: 65ms CPU time

Third-party scripts: 229ms (5% of total)

Main Thread Breakdown

Style & Layout 64% Other 16% Script Evaluation 14% Rendering 3%

Script	Total	Scripting	Parse/Compile	Party
https://www.mossandmolt.com/	3658ms	210ms	29ms	1st
Unattributable	330ms	21ms	0ms	1st
https://cdn.shopify.com/extensions/01a18241-b12a-793d-aab3-0689dd4e6842/judgeme-833/assets/loader.js	164ms	82ms	0ms	3rd
https://www.mossandmolt.com/cdn/wpm/b264bf420w2e1681cap8d55857fm7d879f9cm.js	163ms	95ms	9ms	1st
https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.register_C2Sc-DlE.esm.js	65ms	35ms	0ms	3rd
https://www.mossandmolt.com/cdn/s/trekkie.storefront.387430da5919a2f9b410f0ffaf5b70216a61abfb.min.js	52ms	48ms	2ms	1st

Page Weight Inventory

Action

425 resources · 3.7 MB · 40 KB savings available

REVIEW

425 resources · 3.7 MB · 40 KB savings available

Page weight 3.7 MB exceeds 1 MB target by 2.7 MB

Got: 3.7 MB Expected: ≤ 1 MB

192 third-party resources (21% of weight)

2 resources over 200KB

425 resources · 3.7 MiB · 192 third-party 2.7 MiB over 1MB target

Image 45% · 1.7 MiB

JavaScript 41% · 1.5 MiB

Document 8% · 299.9 KiB

Font 4% · 141.9 KiB

CSS 1% · 55.8 KiB

Other 1% · 45.4 KiB

~39.6 KiB of savings available

Remove unused JavaScript: 39.6 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

425 resources			3.7 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

21% third-party, 0 ms blocking

PASS

21% third-party, 0 ms blocking

Third-party code accounts for 21% of page weight (793.3 KiB of 3.7 MiB)

Third-party blocking time is low (0 ms)

79%

21%

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 216 ms