match: skip walking up the directory hierarchy if the number of pats are small
Previously, we would receive a path like abc/def/ghi and "walk up" the directory
hierarchy, checking abc/def, abc, and `b''` to see if they were in the set of
prefixes that this matcher covered. We did this indiscriminately - we generated
all of these paths even if the set of prefixes the matcher covered was
completely empty, which is the case for a lot of repos at my company (the narrow
matcher we use is usually non-recursive).
This brings the time for a rebase in one of my repos from 12.20s to 10.87s. In
this particular repo, this is entirely due to the `len(prefix_set) == 0` check,
as I do not have any recursive patterns in the narrowspec.
Differential Revision: https://phab.mercurial-scm.org/D9488
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
/*! Build script to integrate PyOxidizer. */
fn main() {
if let Ok(config_rs) =
std::env::var("DEP_PYTHONXY_DEFAULT_PYTHON_CONFIG_RS")
{
println!(
"cargo:rustc-env=PYOXIDIZER_DEFAULT_PYTHON_CONFIG_RS={}",
config_rs
);
} else {
panic!("unable to find build artifacts generated by pyembed crate");
}
}