Mercurial > hg
diff rust/hg-core/src/dirstate/dirstate_tree.rs @ 45562:b51167d70f5a
rust: add `dirstate_tree` module
Mercurial needs to represent the filesystem hierarchy on which it operates, for
example in the dirstate. Its current on-disk representation is an unsorted, flat
structure that gets transformed in the current Rust code into a `HashMap`.
This loses the hierarchical information of the dirstate, leading to some
unfortunate performance and algorithmic compromises.
This module adds an implementation of a radix tree that is specialized for
representing the dirstate: its unit is the path component. I have made no
efforts to optimize either its memory footprint or its insertion speed: they're
pretty bad for now.
Following will be a few patches that modify the dirstate.status logic to use
that new hierarchical information, fixing issue 6335 in the same swing.
Differential Revision: https://phab.mercurial-scm.org/D9085
| author | Raphaël Gomès <rgomes@octobus.net> |
|---|---|
| date | Fri, 25 Sep 2020 17:51:34 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/rust/hg-core/src/dirstate/dirstate_tree.rs Fri Sep 25 17:51:34 2020 +0200 @@ -0,0 +1,14 @@ +// dirstate_tree.rs +// +// Copyright 2020, Raphaël Gomès <rgomes@octobus.net> +// +// This software may be used and distributed according to the terms of the +// GNU General Public License version 2 or any later version. + +//! Special-case radix tree that matches a filesystem hierarchy for use in the +//! dirstate. +//! It has not been optimized at all yet. + +pub mod iter; +pub mod node; +pub mod tree;