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perf: add basic sort performance test
Add a sort command to test-string-list that reads lines from stdin, stores them in a string_list and then sorts it. Use it in a simple perf test script to measure the performance of string_list_sort(). Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -97,6 +97,31 @@ int cmd_main(int argc, const char **argv)
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return 0;
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}
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if (argc == 2 && !strcmp(argv[1], "sort")) {
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struct string_list list = STRING_LIST_INIT_NODUP;
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struct strbuf sb = STRBUF_INIT;
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struct string_list_item *item;
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strbuf_read(&sb, 0, 0);
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/*
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* Split by newline, but don't create a string_list item
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* for the empty string after the last separator.
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*/
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if (sb.buf[sb.len - 1] == '\n')
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strbuf_setlen(&sb, sb.len - 1);
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string_list_split_in_place(&list, sb.buf, '\n', -1);
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string_list_sort(&list);
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for_each_string_list_item(item, &list)
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puts(item->string);
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string_list_clear(&list, 0);
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strbuf_release(&sb);
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return 0;
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}
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fprintf(stderr, "%s: unknown function name: %s\n", argv[0],
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argv[1] ? argv[1] : "(there was none)");
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return 1;
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26
t/perf/p0071-sort.sh
Executable file
26
t/perf/p0071-sort.sh
Executable file
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@ -0,0 +1,26 @@
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#!/bin/sh
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test_description='Basic sort performance tests'
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. ./perf-lib.sh
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test_perf_default_repo
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test_expect_success 'setup' '
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git ls-files --stage "*.[ch]" "*.sh" |
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cut -f2 -d" " |
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git cat-file --batch >unsorted
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'
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test_perf 'sort(1)' '
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sort <unsorted >expect
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'
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test_perf 'string_list_sort()' '
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test-string-list sort <unsorted >actual
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'
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test_expect_success 'string_list_sort() sorts like sort(1)' '
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test_cmp_bin expect actual
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'
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test_done
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