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rust-nodemap: pure Rust example
To run, use `cargo run --release --example nodemap`
This demonstrates that simple scenarios entirely written
in Rust can content themselves with `NodeTree<T>`.
The example mmaps both the nodemap file and the changelog index.
We had of course to include an implementation of `RevlogIndex`
directly, which isn't much at this stage. It felt a bit
prematurate to include it in the lib.
Here are some first performance measurements, obtained with
this example, on a clone of mozilla-central with 440000
changesets:
(create) Nodemap constructed in RAM in 153.638305ms
(query CAE63161B68962) found in 22.362us: Ok(Some(269489))
(bench) Did 3 queries in 36.418µs (mean 12.139µs)
(bench) Did 50 queries in 184.318µs (mean 3.686µs)
(bench) Did 100000 queries in 31.053461ms (mean 310ns)
To be fair, even between bench runs, results tend to depend whether
the file is still in kernel caches, and it's not so easy to
get back to a real cold start. The worst we've seen was in the
50us ballpark.
In any busy server setting, the pages would always be in RAM.
We hope it's good enough not to be significantly slower on any
concrete Mercurial operation than the C nodetree when fully in RAM,
and of course this implementation has the serious headstart advantage
of persistence.
Differential Revision: https://phab.mercurial-scm.org/D7797
author | Georges Racinet <georges.racinet@octobus.net> |
---|---|
date | Tue, 18 Feb 2020 19:11:15 +0100 |
parents | 64e104ca555e |
children | 1c8e3c17c702 |
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# If you want to change PREFIX, do not just edit it below. The changed # value wont get passed on to recursive make calls. You should instead # override the variable on the command like: # # % make PREFIX=/opt/ install export PREFIX=/usr/local PYTHON?=python $(eval HGROOT := $(shell pwd)) HGPYTHONS ?= $(HGROOT)/build/pythons PURE= PYFILESCMD=find mercurial hgext doc -name '*.py' PYFILES:=$(shell $(PYFILESCMD)) DOCFILES=mercurial/helptext/*.txt export LANGUAGE=C export LC_ALL=C TESTFLAGS ?= $(shell echo $$HGTESTFLAGS) OSXVERSIONFLAGS ?= $(shell echo $$OSXVERSIONFLAGS) CARGO = cargo # Set this to e.g. "mingw32" to use a non-default compiler. COMPILER= COMPILERFLAG_tmp_ = COMPILERFLAG_tmp_${COMPILER} ?= -c $(COMPILER) COMPILERFLAG=${COMPILERFLAG_tmp_${COMPILER}} help: @echo 'Commonly used make targets:' @echo ' all - build program and documentation' @echo ' install - install program and man pages to $$PREFIX ($(PREFIX))' @echo ' install-home - install with setup.py install --home=$$HOME ($(HOME))' @echo ' local - build for inplace usage' @echo ' tests - run all tests in the automatic test suite' @echo ' test-foo - run only specified tests (e.g. test-merge1.t)' @echo ' dist - run all tests and create a source tarball in dist/' @echo ' clean - remove files created by other targets' @echo ' (except installed files or dist source tarball)' @echo ' update-pot - update i18n/hg.pot' @echo @echo 'Example for a system-wide installation under /usr/local:' @echo ' make all && su -c "make install" && hg version' @echo @echo 'Example for a local installation (usable in this directory):' @echo ' make local && ./hg version' all: build doc local: $(PYTHON) setup.py $(PURE) \ build_py -c -d . \ build_ext $(COMPILERFLAG) -i \ build_hgexe $(COMPILERFLAG) -i \ build_mo env HGRCPATH= $(PYTHON) hg version build: $(PYTHON) setup.py $(PURE) build $(COMPILERFLAG) wheel: FORCE_SETUPTOOLS=1 $(PYTHON) setup.py $(PURE) bdist_wheel $(COMPILERFLAG) doc: $(MAKE) -C doc cleanbutpackages: rm -f hg.exe -$(PYTHON) setup.py clean --all # ignore errors from this command find contrib doc hgext hgext3rd i18n mercurial tests hgdemandimport \ \( -name '*.py[cdo]' -o -name '*.so' \) -exec rm -f '{}' ';' rm -f MANIFEST MANIFEST.in hgext/__index__.py tests/*.err rm -f mercurial/__modulepolicy__.py if test -d .hg; then rm -f mercurial/__version__.py; fi rm -rf build mercurial/locale $(MAKE) -C doc clean $(MAKE) -C contrib/chg distclean rm -rf rust/target rm -f mercurial/rustext.so clean: cleanbutpackages rm -rf packages install: install-bin install-doc install-bin: build $(PYTHON) setup.py $(PURE) install --root="$(DESTDIR)/" --prefix="$(PREFIX)" --force install-doc: doc cd doc && $(MAKE) $(MFLAGS) install install-home: install-home-bin install-home-doc install-home-bin: build $(PYTHON) setup.py $(PURE) install --home="$(HOME)" --prefix="" --force install-home-doc: doc cd doc && $(MAKE) $(MFLAGS) PREFIX="$(HOME)" install MANIFEST-doc: $(MAKE) -C doc MANIFEST MANIFEST.in: MANIFEST-doc hg manifest | sed -e 's/^/include /' > MANIFEST.in echo include mercurial/__version__.py >> MANIFEST.in sed -e 's/^/include /' < doc/MANIFEST >> MANIFEST.in dist: tests dist-notests dist-notests: doc MANIFEST.in TAR_OPTIONS="--owner=root --group=root --mode=u+w,go-w,a+rX-s" $(PYTHON) setup.py -q sdist check: tests tests: # Run Rust tests if cargo is installed if command -v $(CARGO) >/dev/null 2>&1; then \ $(MAKE) rust-tests; \ fi cd tests && $(PYTHON) run-tests.py $(TESTFLAGS) test-%: cd tests && $(PYTHON) run-tests.py $(TESTFLAGS) $@ testpy-%: @echo Looking for Python $* in $(HGPYTHONS) [ -e $(HGPYTHONS)/$*/bin/python ] || ( \ cd $$(mktemp --directory --tmpdir) && \ $(MAKE) -f $(HGROOT)/contrib/Makefile.python PYTHONVER=$* PREFIX=$(HGPYTHONS)/$* python ) cd tests && $(HGPYTHONS)/$*/bin/python run-tests.py $(TESTFLAGS) rust-tests: py_feature = $(shell $(PYTHON) -c \ 'import sys; print(["python27-bin", "python3-bin"][sys.version_info[0] >= 3])') rust-tests: cd $(HGROOT)/rust/hg-cpython \ && $(CARGO) test --quiet --all \ --no-default-features --features "$(py_feature)" check-code: hg manifest | xargs python contrib/check-code.py format-c: clang-format --style file -i \ `hg files 'set:(**.c or **.cc or **.h) and not "listfile:contrib/clang-format-ignorelist"'` update-pot: i18n/hg.pot i18n/hg.pot: $(PYFILES) $(DOCFILES) i18n/posplit i18n/hggettext $(PYTHON) i18n/hggettext mercurial/commands.py \ hgext/*.py hgext/*/__init__.py \ mercurial/fileset.py mercurial/revset.py \ mercurial/templatefilters.py \ mercurial/templatefuncs.py \ mercurial/templatekw.py \ mercurial/filemerge.py \ mercurial/hgweb/webcommands.py \ mercurial/util.py \ $(DOCFILES) > i18n/hg.pot.tmp # All strings marked for translation in Mercurial contain # ASCII characters only. But some files contain string # literals like this '\037\213'. xgettext thinks it has to # parse them even though they are not marked for translation. # Extracting with an explicit encoding of ISO-8859-1 will make # xgettext "parse" and ignore them. $(PYFILESCMD) | xargs \ xgettext --package-name "Mercurial" \ --msgid-bugs-address "<mercurial-devel@mercurial-scm.org>" \ --copyright-holder "Matt Mackall <mpm@selenic.com> and others" \ --from-code ISO-8859-1 --join --sort-by-file --add-comments=i18n: \ -d hg -p i18n -o hg.pot.tmp $(PYTHON) i18n/posplit i18n/hg.pot.tmp # The target file is not created before the last step. So it never is in # an intermediate state. mv -f i18n/hg.pot.tmp i18n/hg.pot %.po: i18n/hg.pot # work on a temporary copy for never having a half completed target cp $@ $@.tmp msgmerge --no-location --update $@.tmp $^ mv -f $@.tmp $@ # Packaging targets packaging_targets := \ centos5 \ centos6 \ centos7 \ centos8 \ deb \ docker-centos5 \ docker-centos6 \ docker-centos7 \ docker-centos8 \ docker-debian-bullseye \ docker-debian-buster \ docker-debian-stretch \ docker-fedora \ docker-ubuntu-trusty \ docker-ubuntu-trusty-ppa \ docker-ubuntu-xenial \ docker-ubuntu-xenial-ppa \ docker-ubuntu-artful \ docker-ubuntu-artful-ppa \ docker-ubuntu-bionic \ docker-ubuntu-bionic-ppa \ fedora \ linux-wheels \ linux-wheels-x86_64 \ linux-wheels-i686 \ ppa # Forward packaging targets for convenience. $(packaging_targets): $(MAKE) -C contrib/packaging $@ osx: rm -rf build/mercurial /usr/bin/python2.7 setup.py install --optimize=1 \ --root=build/mercurial/ --prefix=/usr/local/ \ --install-lib=/Library/Python/2.7/site-packages/ make -C doc all install DESTDIR="$(PWD)/build/mercurial/" # Place a bogon .DS_Store file in the target dir so we can be # sure it doesn't get included in the final package. touch build/mercurial/.DS_Store # install zsh completions - this location appears to be # searched by default as of macOS Sierra. install -d build/mercurial/usr/local/share/zsh/site-functions/ install -m 0644 contrib/zsh_completion build/mercurial/usr/local/share/zsh/site-functions/_hg # install bash completions - there doesn't appear to be a # place that's searched by default for bash, so we'll follow # the lead of Apple's git install and just put it in a # location of our own. install -d build/mercurial/usr/local/hg/contrib/ install -m 0644 contrib/bash_completion build/mercurial/usr/local/hg/contrib/hg-completion.bash make -C contrib/chg \ HGPATH=/usr/local/bin/hg \ PYTHON=/usr/bin/python2.7 \ HGEXTDIR=/Library/Python/2.7/site-packages/hgext \ DESTDIR=../../build/mercurial \ PREFIX=/usr/local \ clean install mkdir -p $${OUTPUTDIR:-dist} HGVER=$$(python contrib/genosxversion.py $(OSXVERSIONFLAGS) build/mercurial/Library/Python/2.7/site-packages/mercurial/__version__.py) && \ OSXVER=$$(sw_vers -productVersion | cut -d. -f1,2) && \ pkgbuild --filter \\.DS_Store --root build/mercurial/ \ --identifier org.mercurial-scm.mercurial \ --version "$${HGVER}" \ build/mercurial.pkg && \ productbuild --distribution contrib/packaging/macosx/distribution.xml \ --package-path build/ \ --version "$${HGVER}" \ --resources contrib/packaging/macosx/ \ "$${OUTPUTDIR:-dist/}"/Mercurial-"$${HGVER}"-macosx"$${OSXVER}".pkg .PHONY: help all local build doc cleanbutpackages clean install install-bin \ install-doc install-home install-home-bin install-home-doc \ dist dist-notests check tests rust-tests check-code format-c \ update-pot \ $(packaging_targets) \ osx