upstream/mercurial-mirror Files · contrib/python-zstandard/zstd/compress/zstd_fast.h

rust-matchers: fix quadratic complexity in `FileMatcher`...

rust-matchers: fix quadratic complexity in `FileMatcher` Concretely, this command: ``` $ echo hg up -r <nodeid>; time hg revert dir1 dir2 -r <othernode> --debug hg up -r <nodeid> real 0m14.690s user 0m14.766s sys 0m5.430s ``` was much slower despite using 16 cores before this change. The approach taken here is the same one used in match.py, in exactmatcher. This changeset was originally written by Valentin Gatien-Baron in a private repository. I have redacted the commit message and did a minor clean up of the code.

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             zstd_fast.h
        
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      /*

       * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.

       * All rights reserved.

       *

       * This source code is licensed under both the BSD-style license (found in the

       * LICENSE file in the root directory of this source tree) and the GPLv2 (found

       * in the COPYING file in the root directory of this source tree).

       * You may select, at your option, one of the above-listed licenses.

       */

      #ifndef ZSTD_FAST_H

      #define ZSTD_FAST_H

      #if defined (__cplusplus)

      extern "C" {

      #endif

      #include "mem.h"      /* U32 */

      #include "zstd_compress_internal.h"

      void ZSTD_fillHashTable(ZSTD_matchState_t* ms,

                              void const* end, ZSTD_dictTableLoadMethod_e dtlm);

      size_t ZSTD_compressBlock_fast(

              ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],

              void const* src, size_t srcSize);

      size_t ZSTD_compressBlock_fast_dictMatchState(

              ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],

              void const* src, size_t srcSize);

      size_t ZSTD_compressBlock_fast_extDict(

              ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],

              void const* src, size_t srcSize);

      #if defined (__cplusplus)

      }

      #endif

      #endif /* ZSTD_FAST_H */

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				/*
				* Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
				* All rights reserved.
				*
				* This source code is licensed under both the BSD-style license (found in the
				* LICENSE file in the root directory of this source tree) and the GPLv2 (found
				* in the COPYING file in the root directory of this source tree).
				* You may select, at your option, one of the above-listed licenses.
				*/

				#ifndef ZSTD_FAST_H
				#define ZSTD_FAST_H

				#if defined (__cplusplus)
				extern "C" {
				#endif

				#include "mem.h" /* U32 */
				#include "zstd_compress_internal.h"

				void ZSTD_fillHashTable(ZSTD_matchState_t* ms,
				void const* end, ZSTD_dictTableLoadMethod_e dtlm);
				size_t ZSTD_compressBlock_fast(
				ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
				void const* src, size_t srcSize);
				size_t ZSTD_compressBlock_fast_dictMatchState(
				ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
				void const* src, size_t srcSize);
				size_t ZSTD_compressBlock_fast_extDict(
				ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
				void const* src, size_t srcSize);

				#if defined (__cplusplus)
				}
				#endif

				#endif /* ZSTD_FAST_H */