I usually blog about a feature the week it lands. This one landed a few weeks ago and was in development for months before that: Codename One can now take a Flutter app's Dart source and build it as a Codename One app. The results are amazing. I held this post back because I know how explosive these claims are. I wanted the numbers to come from a CI job that runs on every commit instead of a benchmark I tuned once on my laptop.

What is Codename One? Codename One is an open-source framework for building native iOS, Android, desktop, and web apps from a single Java or Kotlin codebase. Learn more at codenameone.com .

In the meantime we also added support for Kotlin Multiplatform with Compose, for a big part of Swing and JavaFX, and for classic Android apps on iOS. More is coming. The part that still surprises me is how well Codename One does against the originals where we measured them.…