ASTM

Claude performance report · https://infinitalab.com/astm/

● Needs urgent work
Source: Claude · PageSpeed Insights
Tested: 3 Aug 2026 · daily
Devices: mobile & desktop
By: Baivab, Growth

Perf · Mobile

/ 100 · poor

Perf · Desktop

/ 100 · needs work

Mobile LCP

6.9s

target < 2.5s

Mobile TBT

677ms

target < 200ms

Page weight

67 MB

mobile

The headline

On mobile this template scores 47 against 74 on desktop. Mobile is held back by main-thread blocking (TBT 677ms) from 1.8 MB of JavaScript. Mobile LCP is slow at 6.9s. It also carries an oversized 67 MB image payload.

Scores & Core Web Vitals

Metric	Mobile	Desktop	Target
Performance	47	74	90+
Accessibility	88	83	90+
Best Practices	73	100	90+
SEO	100	100	90+
Largest Contentful Paint	6.9s	14.4s	< 2.5s
Cumulative Layout Shift	0.02	0.03	< 0.1
Total Blocking Time	677ms	0ms	< 200ms
First Contentful Paint	2.9s	0.8s	< 1.8s
Speed Index	8.1s	0.9s	< 3.4s
Time to First Byte	94ms	29ms	< 0.8s

Page composition

Metric	Mobile	Desktop
Total page weight	67 MB	64 MB
Images	64 MB	64 MB
JavaScript	1.8 MB	0.0 MB
Third-party bytes	—	—
Requests (total)	220	101
Script requests	43	3
Image requests	117	85
DOM elements	—	—
CPU time	4.2s	0.6s

Prioritised recommendations (click to expand)

P1Cut the mobile JavaScript bundle›

Mobile TBT is 677ms from 1.8 MB of JavaScript. Defer and code-split non-critical JS, remove unused libraries, audit third-party scripts.

P1Fix broken LCP›

LCP is 14.4s on desktop. Investigate render-blocking resources, slow hero images and failed requests.

P2Compress oversized images›

Mobile loads 67 MB, almost all images. Serve WebP/AVIF, size responsive images and lazy-load. Aim under 2 MB.

Source: Claude via Google PageSpeed Insights, 3 Aug 2026. Mobile: Slow 4G, Moto G Power. Lab results are single-run and vary run to run.