Performance

· 14 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

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.

872 ms

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

1.82 s

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

116 ms

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

0.004

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

1.81 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.

4.75 s

Page Load Progression

908 ms

1.8 s

2.7 s

3.6 s

4.5 s

5.4 s

6.4 s

7.3 s

Checks

6 PASS 2 REVIEW 4 FIX

Page Weight Budget

Action

3.5 MB transferred, 301 requests

FIX

3.5 MB transferred, 301 requests

Page weighs 5.7 MB (3.5 MB transferred)

Images are 1.2 MB — compress or use modern formats

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

Got: 1.2 MB

JavaScript is 1.0 MB — consider code splitting or lazy loading

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

Got: 1.0 MB

301 HTTP requests — consider bundling or reducing

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

Estimated 0.73 g CO2 per page load

3.5 MB transferred

301 requests

0.73 g CO2 per page load

Images 1.2 MiB 35%

JavaScript 1.0 MiB 30%

Other 885.9 KiB 25%

Fonts 169.8 KiB 5%

HTML 86.2 KiB 2%

CSS 71.1 KiB 2%

Other 23.1 KiB 1%

Other 9.5 KiB 0%

Other 8.3 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

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (3.5 MiB of 3.5 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

JS Execution Cost

Action

2878ms total JS execution

FIX

2878ms total JS execution

https://goodfair1.myshopify.com/: 1066ms CPU time

Unattributable: 582ms CPU time

https://ajax.googleapis.com/ajax/libs/jquery/1.11....: 264ms CPU time

https://goodfair1.myshopify.com/cdn/shop/t/360/ass...: 170ms CPU time

https://www.googletagmanager.com/gtag/js?id=G-0JCF...: 146ms CPU time

Third-party scripts: 2878ms (100% of total)

Main Thread Breakdown

Other 31% Style & Layout 31% Script Evaluation 28% Script Parsing & Compilation 4% Rendering 4%

Script	Total	Scripting	Parse/Compile	Party
https://goodfair1.myshopify.com/	1066ms	34ms	8ms	3rd
Unattributable	582ms	55ms	0ms	3rd
https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js	264ms	57ms	5ms	3rd
https://goodfair1.myshopify.com/cdn/shop/t/360/assets/critical.js?v=169402557219780209121766433240	170ms	6ms	0ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-0JCF4YLMMR	146ms	121ms	23ms	3rd
https://goodfair1.myshopify.com/cdn/wpm/b0e8c7c7aw41bd75a1p837d7fd4m8b145375m.js	136ms	81ms	10ms	3rd
https://www.googletagmanager.com/gtag/destination?id=AW-11305189733&cx=c&gtm=4e6470h2	91ms	72ms	18ms	3rd
https://www.googletagmanager.com/gtag/destination?id=MC-ELYEDT6X9J&cx=c&gtm=4e6470h2	79ms	65ms	14ms	3rd
https://goodfair1.myshopify.com/cdn/shopifycloud/shop-js/modules/v2/chunk.index_4uAqGWkW.en.esm.js	65ms	49ms	0ms	3rd
https://goodfair1.myshopify.com/cdn/s/trekkie.storefront.e683ac02f599017ff9915d0144977db42ea1653f.min.js	63ms	50ms	7ms	3rd

Showing top 10 of 14 scripts

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0

Directive	Value	Meaning
private	—	Only browser cache, not CDN/proxy
max-age	0	Cache for 0 seconds
no-store	—	Never cache this response
no-cache	—	Cache but always revalidate first
must-revalidate	—	Must recheck with server after expiry
post-check	0
pre-check	0

Image Optimization

43 images, 0 KB saveable

REVIEW

43 images, 0 KB saveable

All images are well-optimized

43 images 1.2 MB

0 oversized -0 KB

37 legacy format

0 missing dimensions CLS risk

JS Bundles

Action

181 scripts, 266 KB unused

REVIEW

181 scripts, 266 KB unused

https://www.googletagmanager.com/gtag/destination?...: 65 KB unused (48%)