We use it to generate sitemaps with >30 million entries. Ported a Rails task that took ~9 hours to Crystal, using a library with the same API as the Ruby gem we

We use it to generate sitemaps with >30 million entries. Ported a Rails task that took ~9 hours to Crystal, using a library with the same API as the Ruby gem we had used. Essentially a copy-paste-tweak that took a couple hours of effort. Crystal version now runs in prod in about 30 minutes.