I did a quick test on various of my rust projects. Most of them it failed to run, on one it miscompiles(?) causing a test case to fail. The only project I got it to run without issue is a basic actix-web website. It takes a whole 14 seconds to actually start the web server. A clean compile is only 24s for all dependencies, and a regular incremental debug build is 2.3s.

The hot patching is unusable. It takes 11s to compile the patch after a simple change: (Some("hi") -> None), and then relax gets a compiler error when refreshing the page.

The project where it miscompiles only has a few very basic dependencies; a clean compile takes 1.3s, incremental just 0.25s and tests take ~0.1s. Relax takes a whole 1.4s to run the tests (unsuccessfully).

I've been using it successfully for makepads own development iterations for quite some time. This release is the first real outside test. Strange you are getting such wildly different numbers tho.

I tried it on few projects I have and 2/4 failed to compile. One compiled and ran tests about 20% slower and one compiled and ran tests in the same amount of time as the original.