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2a6ce090f2
To enable optimize multiple pathspec items in revision traversal, return 0 if all pathspec item is literal in forbid_bloom_filters(). Add for loops to initialize and check each pathspec item's bloom_keyvec when optimization is possible. Add new test cases in t/t4216-log-bloom.sh to ensure - consistent results between the optimization for multiple pathspec items using bloom filter and the case without bloom filter optimization. - does not use bloom filter if any pathspec item is not literal. With these optimizations, we get some improvements for multi-pathspec runs of 'git log'. First, in the Git repository we see these modest results: Benchmark 1: old Time (mean ± σ): 73.1 ms ± 2.9 ms Range (min … max): 69.9 ms … 84.5 ms 42 runs Benchmark 2: new Time (mean ± σ): 55.1 ms ± 2.9 ms Range (min … max): 51.1 ms … 61.2 ms 52 runs Summary 'new' ran 1.33 ± 0.09 times faster than 'old' But in a larger repo, such as the LLVM project repo below, we get even better results: Benchmark 1: old Time (mean ± σ): 1.974 s ± 0.006 s Range (min … max): 1.960 s … 1.983 s 10 runs Benchmark 2: new Time (mean ± σ): 262.9 ms ± 2.4 ms Range (min … max): 257.7 ms … 266.2 ms 11 runs Summary 'new' ran 7.51 ± 0.07 times faster than 'old' Signed-off-by: Derrick Stolee <stolee@gmail.com> [ly: rename convert_pathspec_to_filter() to convert_pathspec_to_bloom_keyvec()] Signed-off-by: Lidong Yan <502024330056@smail.nju.edu.cn> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Git - fast, scalable, distributed revision control system
Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.
Git is an Open Source project covered by the GNU General Public License version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.
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Many Git online resources are accessible from https://git-scm.com/ including full documentation and Git related tools.
See Documentation/gittutorial.adoc to get started, then see
Documentation/giteveryday.adoc for a useful minimum set of commands, and
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If git has been correctly installed, then the tutorial can also be
read with man gittutorial or git help tutorial, and the
documentation of each command with man git-<commandname> or git help <commandname>.
CVS users may also want to read Documentation/gitcvs-migration.adoc
(man gitcvs-migration or git help cvs-migration if git is
installed).
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- random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of "get" may or may not be relevant.
- stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
- "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
- "goddamn idiotic truckload of sh*t": when it breaks