Based on what my own tests have shown, it seems that Netlify serves content from EC2 instances in the AWS region that's closest to the visitor (presumably using

Based on what my own tests have shown, it seems that Netlify serves content from EC2 instances in the AWS region that's closest to the visitor (presumably using NS1's Geo Routing). That definitely results in better performance compared to a site served from a single data center or S3 bucket, but it can't quite keep up with CDNs with hundreds of PoPs like Cloudflare or Fastly (which is what GitHub pages runs on). For me, the convenience of Netlify won out over the still relatively minor performance impact. (IIRC Netlify also has an option you can enable to serve some assets via CloudFront, so that should speed things up for subresources.)