Portobello Crest
Portobello Crest is a BigCommerce theme by Flair Consultancy ($235). Tested on 2026-11-10 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 65 for mobile speed and 87 for desktop speed, 87/90 for SEO and 88/86 for accessibility (mobile/desktop, 0–100).
Mobile74

Desktop77

Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 65 | 87 |
| SEO | 87 | 90 |
| Accessibility | 88 | 86 |
| Best practices | 97 | 97 |
Single preset · measured 36 times since 2026-10-03 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Portobello-Crest home page
Mobile
Speed 74 · 26 points to gain
- −23.5 Largest Contentful Paint medium effort
- −1.8 Speed Index medium effort
- 900 ms Reduce unused JavaScript high effort
- 450 ms Reduce unused CSS high effort
- 150 ms Minify JavaScript low effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 91 · 9 points to gain
- −4.4 `[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5. low effort
- −3.1 `[aria-hidden="true"]` elements contain focusable descendents medium effort
- −1.3 Document does not have a main landmark. medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Desktop
Speed 77 · 23 points to gain
- −16 Cumulative Layout Shift medium effort
- −4.3 Largest Contentful Paint medium effort
- −2.1 Total Blocking Time medium effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 88 · 12 points to gain
- −4.4 `[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5. low effort
- −3.1 `[aria-hidden="true"]` elements contain focusable descendents medium effort
- −3.1 Links do not have a discernible name medium effort
- −1.3 Document does not have a main landmark. medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Portobello-Crest default demo ↗ | 65 | 87 | 88 | 87 | 90 | 86 | 2026-10-31 |
| category ↗ | 80 | 92 | 90 | 92 | 92 | 87 | 2026-11-10 |
| home ↗ | 74 | 92 | 91 | 77 | 92 | 88 | 2026-10-31 |
| product ↗ | 41 | 77 | 83 | 93 | 85 | 84 | 2026-11-10 |