miniblog.

I'm experimenting with jj this weekend. It seems pretty nice so far, but the mental model is pretty different from git. For example, there's no `checkout` command. You do `jj new ABC` to switch to a commit, which creates a new empty commit on top of ABC.

The games console market is fascinating: there's incentive to *not* provide upgraded models. You want the guarantee that a game for $X just works on any $X purchased. E.g. the Switch OLED has a bigger screen, and a better CPU than the original, but it's downclocked to match the original Switch's CPU.

It's wonderfully easy to switch out the allocator in Rust: https://doc.rust-lang.org/edition-guide/rust-next/no-jemalloc.html Sadly it didn't help difftastic performance despite doing a lot of allocation, but it's really easy to try it!