Raphaël Gomès <rgomes@octobus.net> [Wed, 29 Nov 2023 23:22:51 -0500] rev 51261
rust-index-cpython: cache the heads' PyList representation
This is the same optimization that the C index does, we just have more
separation of the Python and native sides.
Raphaël Gomès <rgomes@octobus.net> [Wed, 29 Nov 2023 15:58:24 -0500] rev 51260
rust-index: use a `BitVec` instead of plain `Vec` for heads computation
The `Vec` method uses one byte per revision, this uses 1 per 8 revisions,
which improves our memory footprint. For large graphs (10+ millions), this
can make a measurable difference server-side.
I have seen no measurable impact on execution speed.
Raphaël Gomès <rgomes@octobus.net> [Wed, 29 Nov 2023 10:04:41 -0500] rev 51259
rust-index: implement faster retain heads using a vec instead of a hashset
This is the same optimization that the C index does, we're only catching up
now because this showed up as slow in benchmarking.
Raphaël Gomès <rgomes@octobus.net> [Thu, 14 Dec 2023 11:52:05 +0100] rev 51258
rust-index: allow inlining VCSGraph parents across crates
Raphaël Gomès <rgomes@octobus.net> [Thu, 23 Nov 2023 18:48:07 +0100] rev 51257
rust-index: allow inlining `parents` across crates
Raphaël Gomès <rgomes@octobus.net> [Thu, 23 Nov 2023 18:47:42 +0100] rev 51256
rust-index: allow inlining `check_revision` across crates
Raphaël Gomès <rgomes@octobus.net> [Thu, 23 Nov 2023 03:41:58 +0100] rev 51255
rust-index: document safety invariants being upheld for every `unsafe` block
We've added a lot of `unsafe` code that shares Rust structs with Python.
While this is unfortunate, it is also unavoidable, so let's at least
systematically explain why each call to `unsafe` is sound.
If any of the unsafe code ends up being wrong (because everyone screws up
at some point), this change at least continues the unspoken rule of always
explaining the need for `unsafe`, so we at least get a chance to think.
Georges Racinet on incendie.racinet.fr <georges@racinet.fr> [Sun, 29 Oct 2023 12:18:03 +0100] rev 51254
rust-index: renamed `MixedIndex` as `Index`
It is simply not mixed any more, hence the name had become a
future source of confusion.
Georges Racinet <georges.racinet@octobus.net> [Sun, 29 Oct 2023 23:54:05 +0100] rev 51253
rust-index: stop instantiating a C Index
The only missing piece was the `cache` to be returned from
`revlog.parse_index_v1_mixed`, and it really seems that it is
essentially repetition of the input, if `inline` is `True`.
Not worth a Rust implementation (C implementation is probably there
for historical reasons).
Georges Racinet <georges.racinet@octobus.net> [Mon, 30 Oct 2023 21:28:30 +0100] rev 51252
rust-revlog: using the ad-hoc `NodeTree` in scmutil
Now that we have an independent `NodeTree` class able to work natively
on the pure Rust index, we use it in `mercurial.scmutil`, with automatic
invalidation after mutation of the index.
This code path is tested by `test-revisions.t` and `test-template-functions.t`