Maps
Mapbox GL JS website performance
Average page takes 14.7s to render its main content — 12.2s over Google's passing threshold.
Key findings
What the data says about Mapbox GL JS sites
The handful of things that jumped out after crunching every diagnostic. Details and quick wins are below.
- 01
Average page takes 14.7s to render its main content — 12.2s over Google's passing threshold.
- 02
Average Google PageSpeed score is 40/100 — well below the 50 passing bar.
At a glance
Average scores across 37 Mapbox GL JS sites
Core Web Vitals
How Mapbox GL JS sites perform in the real world
Avg. LCP
Google's Good: < 2.5s
Avg. FCP
Good: < 1.8s
Avg. CLS
Good: < 0.1
Avg. TTFB
Good: < 0.8s
Performance spread
How Mapbox GL JS sites cluster on page speed
PageSpeed scores grouped into Google's tier labels. The shape of the distribution tells you whether the industry average hides a few great outliers — or a long tail of broken sites.
- Critical0–4972.5%
- Needs work50–6920.0%
- Decent70–897.5%
- Good90–1000.0%
Long tail: 73% of sites land in the Critical tier. This is where the easiest wins live — any site that climbs above 50 outperforms nearly half the market.
Adoption by industry
Where Mapbox GL JS shows up most
Top industries running this stack, based on the diagnostic sample.
Quick wins
The fixes that would move most Mapbox GL JS sites forward
Ranked by how often we saw each issue across 37 sites. If yours has these, every competitor with them fixed is beating you on something Google measures.
- 01
Main content takes too long to appear
Found on 89.2% of sitesSpeedhigh impact - 02
199 broken links
Found on 67.6% of sitesSecuritymedium impact - 03
4 pages share the same title
Found on 62.2% of sitesSEOmedium impact - 04
No sitemap found
Found on 21.6% of sitesSEOhigh impact - 05
No robots.txt found
Found on 16.2% of sitesSEOhigh impact
FAQ
Common questions
37 sites using Mapbox GL JS. Each one ran the full diagnostic — PageSpeed, SEO checks, SSL verification, and full tech-stack detection.
Mapbox GL JS sites in our sample average 40/100 on Google PageSpeed with an LCP of 14.7s. Performance depends more on how the site is configured than on the platform itself — we see fast and slow Mapbox GL JS sites in every industry we track.
Mapbox GL JS is most common in eye care (3 sites in our sample). Full breakdown is in the Adoption by industry section above.
Run the free audit on this page. You'll get your own site's performance scored against the Mapbox GL JS benchmark, so you can see whether your current stack is costing you speed or SEO rankings.
How we fix it
Web Boost — we fix the gaps we just showed you, every month
The diagnostic above tells you what's broken on Mapbox GL JS websites. Web Boost is the monthly retainer that actually ships the fixes: senior developers, AI-assisted, concrete before/after reports, cancel anytime.
Speed + Core Web Vitals
Image compression, caching, lazy loading, render-blocking cleanup — the fixes the benchmark above flagged.
On-page SEO + structured data
Meta tags, canonicals, schema markup, internal linking — every signal Google's crawler expects, audited and fixed.
Conversion rate + mobile UX
CTAs, forms, microcopy, mobile layout. Turn the traffic you're already getting into leads and customers.
The diagnostic engine is the same one we ship for product and agency clients
Is Mapbox GL JS working for your site?
Email us and we'll run a diagnostic comparing your performance to the Mapbox GL JS sample above. No intake form, results back within a business day.
Or write to hello@borahlabs.us directly. No intake form, no pitch deck.