1496cc92f6
A few hash_table users roll their own integer hash functions which call _mesa_hash_data to perform the hashing which ultimately calls into XXH32 with a dynamic key length. When using small keys with a constant size the hash rate can be greatly improved by inlining XXH32 and providing it a constant key length, see: https://fastcompression.blogspot.com/2018/03/xxhash-for-small-keys-impressive-power.html Additionally, this patch removes calls to _mesa_key_hash_string and makes them instead call _mesa_has_string directly, matching the new integer hash functions. Reviewed-by: Eric Anholt <eric@anholt.net> Reviewed-by: Iago Toral Quiroga <itoral@igalia.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3475>
66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/*
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* Copyright © 2018 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#undef NDEBUG
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "hash_table.h"
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int
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main(int argc, char **argv)
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{
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struct hash_table *ht;
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const char *str1 = "test1";
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const char *str2 = "test2";
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struct hash_entry *entry;
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(void) argc;
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(void) argv;
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ht = _mesa_hash_table_create(NULL, _mesa_hash_string, _mesa_key_string_equal);
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_mesa_hash_table_insert(ht, str1, NULL);
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_mesa_hash_table_insert(ht, str2, NULL);
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entry = _mesa_hash_table_search(ht, str2);
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assert(strcmp(entry->key, str2) == 0);
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entry = _mesa_hash_table_search(ht, str1);
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assert(strcmp(entry->key, str1) == 0);
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_mesa_hash_table_remove_key(ht, str1);
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entry = _mesa_hash_table_search(ht, str1);
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assert(entry == NULL);
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entry = _mesa_hash_table_search(ht, str2);
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assert(strcmp(entry->key, str2) == 0);
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_mesa_hash_table_destroy(ht, NULL);
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return 0;
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}
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