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perf: compare diff algorithms
8c912ee
(teach --histogram to diff, 2011-07-12) claimed histogram diff
was faster than both Myers and patience.
We have since incorporated a performance testing framework, so add a
test that compares the various diff tasks performed in a real 'log -p'
workload. This does indeed show that histogram diff slightly beats
Myers, while patience is much slower than the others.
Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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29
t/perf/p4000-diff-algorithms.sh
Executable file
29
t/perf/p4000-diff-algorithms.sh
Executable file
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#!/bin/sh
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test_description="Tests diff generation performance"
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. ./perf-lib.sh
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test_perf_default_repo
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test_perf 'log -3000 (baseline)' '
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git log -1000 >/dev/null
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'
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test_perf 'log --raw -3000 (tree-only)' '
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git log --raw -3000 >/dev/null
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'
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test_perf 'log -p -3000 (Myers)' '
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git log -p -3000 >/dev/null
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'
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test_perf 'log -p -3000 --histogram' '
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git log -p -3000 --histogram >/dev/null
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'
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test_perf 'log -p -3000 --patience' '
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git log -p -3000 --patience >/dev/null
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'
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test_done
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