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41d97837ab
Inline the check for whitespace flags so that the compiler can hoist
it out of the loop in xdl_prepare_ctx(). This improves the performance
by 8%.
$ hyperfine --warmup=1 -L rev HEAD,HEAD^ --setup='git checkout {rev} -- :/ && make git' ': {rev}; GIT_CONFIG_GLOBAL=/dev/null ./git log --oneline --shortstat v2.0.0..v2.5.0'
Benchmark 1: : HEAD; GIT_CONFIG_GLOBAL=/dev/null ./git log --oneline --shortstat v2.0.0..v2.5.0
Time (mean ± σ): 1.670 s ± 0.044 s [User: 1.473 s, System: 0.196 s]
Range (min … max): 1.619 s … 1.754 s 10 runs
Benchmark 2: : HEAD^; GIT_CONFIG_GLOBAL=/dev/null ./git log --oneline --shortstat v2.0.0..v2.5.0
Time (mean ± σ): 1.801 s ± 0.021 s [User: 1.605 s, System: 0.192 s]
Range (min … max): 1.766 s … 1.831 s 10 runs
Summary
': HEAD^; GIT_CONFIG_GLOBAL=/dev/null ./git log --oneline --shortstat v2.0.0..v2.5.0' ran
1.08 ± 0.03 times faster than ': HEAD^^; GIT_CONFIG_GLOBAL=/dev/null ./git log --oneline --shortstat v2.0.0..v2.5.0'
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
57 lines
2.2 KiB
C
57 lines
2.2 KiB
C
/*
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* LibXDiff by Davide Libenzi ( File Differential Library )
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* Copyright (C) 2003 Davide Libenzi
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Davide Libenzi <davidel@xmailserver.org>
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*
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*/
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#if !defined(XUTILS_H)
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#define XUTILS_H
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long xdl_bogosqrt(long n);
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int xdl_emit_diffrec(char const *rec, long size, char const *pre, long psize,
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xdemitcb_t *ecb);
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int xdl_cha_init(chastore_t *cha, long isize, long icount);
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void xdl_cha_free(chastore_t *cha);
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void *xdl_cha_alloc(chastore_t *cha);
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long xdl_guess_lines(mmfile_t *mf, long sample);
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int xdl_blankline(const char *line, long size, long flags);
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int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags);
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unsigned long xdl_hash_record_verbatim(char const **data, char const *top);
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unsigned long xdl_hash_record_with_whitespace(char const **data, char const *top, long flags);
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static inline unsigned long xdl_hash_record(char const **data, char const *top, long flags)
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{
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if (flags & XDF_WHITESPACE_FLAGS)
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return xdl_hash_record_with_whitespace(data, top, flags);
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else
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return xdl_hash_record_verbatim(data, top);
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}
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unsigned int xdl_hashbits(unsigned int size);
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int xdl_num_out(char *out, long val);
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int xdl_emit_hunk_hdr(long s1, long c1, long s2, long c2,
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const char *func, long funclen, xdemitcb_t *ecb);
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int xdl_fall_back_diff(xdfenv_t *diff_env, xpparam_t const *xpp,
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int line1, int count1, int line2, int count2);
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/* Do not call this function, use XDL_ALLOC_GROW instead */
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void* xdl_alloc_grow_helper(void* p, long nr, long* alloc, size_t size);
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#endif /* #if !defined(XUTILS_H) */
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