Masthead Pro + EmDash CMS
Masthead Pro + EmDash CMS is a Astro theme by ondelva (Paid). Tested on 2026-10-28 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 92 for mobile speed and 90 for desktop speed, 100/91 for SEO and 100/100 for accessibility (mobile/desktop, 0–100).
Mobile92
Desktop90
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 92 | 90 |
| SEO | 100 | 91 |
| Accessibility | 100 | 100 |
| Best practices | 100 | 100 |
Single preset · measured 2 times since 2026-10-28 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Masthead Pro + EmDash CMS home page
Mobile
Speed 92 · 8 points to gain
- −6.6 Speed Index medium effort
- −1 Largest Contentful Paint medium effort
- −0.5 First Contentful Paint medium effort
Desktop
Speed 90 · 10 points to gain
- −9.8 Speed Index medium effort
SEO 91 · 9 points to gain
- −9.1 robots.txt is not valid outside the theme
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Masthead Pro + EmDash CMS default demo ↗ | 92 | 100 | 100 | 90 | 91 | 100 | 2026-10-28 |
| home ↗ | 92 | 100 | 100 | 90 | 91 | 100 | 2026-10-28 |
Show this score on your site
A live badge: it always shows Masthead Pro + EmDash CMS's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/astro/masthead-pro-emdash-cms"><img src="https://themestested.com/badge/astro/masthead-pro-emdash-cms.svg" alt="Masthead Pro + EmDash CMS speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.