This is an updated set of benchmarks for testing immutable update performance of various versions of Immer against a vanilla reducer, as well as mutative and mutative-compat.
I've also included a copy of Immer 10 built from the faster-iteration-experiment branch.
The reducers were copied from https://github.com/gentlee/state-manager-benchmarks , rather than using Immer's existing benchmarks.
Install with PNPM, and run pnpm start to run the benchmark.
(Note: the "freeze" variable is irrelevant with the vanilla reducer, but it was easiest to run that twice same as all the other implementations.)