Bevy (the engine itself) actually compiles faster than Godot (the engine itself) on my machine. The difference is that Godot ships the engine pre-compiled. With cached builds / shared builds (and/or dynamic linking) things look much better. (disclosure: I am Bevy's creator). That being said, if you're doing GDScript for game logic (or even C#) in Godot, game logic does still compile much faster in Godot. And the "precompiled Bevy / dynamic linking game logic" pattern in Bevy isn't a standard workflow atm (but with the upcoming editor we're planning on making that easier to set up).