by default, snapshots only get created on (most) `jj` invocations

the watchman integration runs snapshots on filesystem changes[0], so every time a tracked file changes on disk, a new commit is added to the evolog regardless of `jj` invocations

so say if you ran `jj status`, then changed a tracked file 3 times, and then ran `jj status` again:

without watchman you'd have 2 new evolog entries, resulting from the two `jj status` calls

with watchman you'd have 5 new evolog entries: one from `jj status`, 3 from file changes, and one from the second `jj status`

0: https://jj-vcs.github.io/jj/latest/config/#watchman

Oh I misunderstood and thought watchman was something like fswatch or entry. Neat!

It is. Jj uses it to watch your repos for changes and trigger commits.

Yeah I see that its a built-in feature now. Useful

What if you do a bunch of work and dont touch jj? None of that work shows up in the evolog. using watchman also apparently makes jj more performant on large repos.

But, again, watchman was explicitly said to be out of scope for this discussion... Do you have any thoughts about jj, or what I said about it?