Raphaël Gomès

Developer and musician. Working on Mercurial SCM @octobus_net.

[Raphaël Gomès @Alphare33]

@charliermarsh Unified testing (as we coined it at the time) is a big big part of Mercurial's testing strategy. It does have it's drawbacks, but if I had to choose between this and unit tests, I'll choose e2e snapshot any day.

[Raphaël Gomès @Alphare33]

@scrabsha Please tell me it's a joke (I've made this same joke before, Vienne is near me)

[Raphaël Gomès @Alphare33]

@DrizzleORM Divothy

[Raphaël Gomès @Alphare33]

@makalkon @htmx_org Version control itself is a skill issue

[Raphaël Gomès @Alphare33]

@Lucretiel Fwiw being snapshot-based does not mean that you can't do copy/rename tracing. Mercurial does explicit (and heuristic if you want) tracking and integrates it relevant graph algorithms.

[Raphaël Gomès @Alphare33]

@scrabsha Si je ne fais qu'un des deux est-ce que j'ai l'ascendant moral ?

[Raphaël Gomès @Alphare33]

@chacon What makes my team happy and what's interesting is increasingly only just Rust tbh 🙃

[Raphaël Gomès @Alphare33]

@psluaces @chacon @Microsoft You need 1 stat per tracked file + 1 opendir/getdents/closedir per directory only if you're listing unknown/ignored... but you can skip the readdir if you keep track of the unknown files and the directory mtime carefully (depending on platform, racy status etc)

[Raphaël Gomès @Alphare33]

@psluaces @chacon @Microsoft Sorry I didn't see this. It's a bespoke datastructure + parallel algorithm, making as few allocations and syscalls as possible (sometimes skipping some that look required but aren't given some situations).

[Raphaël Gomès @Alphare33]

@chacon @Microsoft Scratch that, turning on `core.fsmonitor` actually makes it *slower* than when using the `untrackedCache`. It hovers around 370ms.

[Raphaël Gomès @Alphare33]

@chacon @Microsoft

[Raphaël Gomès @Alphare33]

@chacon @Microsoft Still looks slow. You're probably not using dirstate-v2. Sorry, lots of hoops to jump through 😅
I think "hg help rust" has a section on dirstate-v2 and how to upgrade to it

[Raphaël Gomès @Alphare33]

@chacon @Microsoft Also (replying out of order), almost any command that needs to boot up Python will lose to Git. We're doing a lot of things that are really fast, but most of it is not available by default, and we've covered only a few commands.

[Raphaël Gomès @Alphare33]

@chacon @Microsoft Take a look at the README in the rust folder or in rhg and it'll probably be a bit helpful. If not, I can get back to a computer tomorrow and figure this out. :)

[Raphaël Gomès @Alphare33]

@chacon @Microsoft However, you're probably not testing 'rhg', which is the pure rust version. Long story short : we've basically been less than 1 full-time at any point in time to develop it, hence the manual setup and Linux-only business.

[Raphaël Gomès @Alphare33]

@chacon @Microsoft @gitbutler I'd be glad to help decipher the poorly documented code. Most of it is a clever working copy cache and parallelism.