##// END OF EJS Templates
copies: do full filtering at end of _changesetforwardcopies()...
copies: do full filtering at end of _changesetforwardcopies() As mentioned earlier, pathcopies() is very slow when copies are stored in the changeset. Most of the cost comes from calling _chain() for every changeset, which is slow because it needs to read manifests. It needs to read manifests to be able to filter out copies that are were created in one commit and then deleted. (It also filters out copies that were created from a file that didn't exist in the starting revision, but that's a fixed revision across calls to _chain(), so it's much cheaper.) This patch changes from _chainandfilter() to just _chain() in the main loop in _changesetforwardcopies(). It instead removes copies that have subsequently been removed by using ctx.filesremoved(). We thus rely on that to be fast. It timed this command in mozilla-unified: hg debugpathcopies FIREFOX_59_0b3_BUILD2 FIREFOX_BETA_59_END It took 18s before and 1.1s after. It's still faster when copy information is stored in filelogs: 0.70s. It also still gets slow when there are merge commits involved, because we read manifests there too. We'll deal with that later. Differential Revision: https://phab.mercurial-scm.org/D6419

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dagops.rs
53 lines | 1.8 KiB | application/rls-services+xml | RustLexer
Georges Racinet
rust-cpython: binding for headrevs()...
r41843 // dagops.rs
//
// Copyright 2019 Georges Racinet <georges.racinet@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.
//! Bindings for the `hg::dagops` module provided by the
//! `hg-core` package.
//!
//! From Python, this will be seen as `mercurial.rustext.dagop`
use cindex::Index;
use cpython::{PyDict, PyModule, PyObject, PyResult, Python};
use crate::conversion::{py_set, rev_pyiter_collect};
use exceptions::GraphError;
use hg::dagops;
use hg::Revision;
use std::collections::HashSet;
/// Using the the `index`, return heads out of any Python iterable of Revisions
///
/// This is the Rust counterpart for `mercurial.dagop.headrevs`
pub fn headrevs(
py: Python,
index: PyObject,
revs: PyObject,
) -> PyResult<PyObject> {
let mut as_set: HashSet<Revision> = rev_pyiter_collect(py, &revs)?;
dagops::retain_heads(&Index::new(py, index)?, &mut as_set)
.map_err(|e| GraphError::pynew(py, e))?;
py_set(py, &as_set)
}
/// Create the module, with `__package__` given from parent
pub fn init_module(py: Python, package: &str) -> PyResult<PyModule> {
let dotted_name = &format!("{}.dagop", package);
let m = PyModule::new(py, dotted_name)?;
m.add(py, "__package__", package)?;
m.add(py, "__doc__", "DAG operations - Rust implementation")?;
m.add(
py,
"headrevs",
py_fn!(py, headrevs(index: PyObject, revs: PyObject)),
)?;
let sys = PyModule::import(py, "sys")?;
let sys_modules: PyDict = sys.get(py, "modules")?.extract(py)?;
sys_modules.set_item(py, dotted_name, &m)?;
// Example C code (see pyexpat.c and import.c) will "give away the
// reference", but we won't because it will be consumed once the
// Rust PyObject is dropped.
Ok(m)
}