upstream/mercurial-mirror Files · mercurial/compat.h

nodemap: also use persistent nodemap for manifest...

nodemap: also use persistent nodemap for manifest The manifest as a different usage pattern than the changelog. First, while the lookup in changelog are not garanteed to match, the lookup in the manifest nodemap come from changelog and will exist in the manifest. In addition, looking up a manifest almost always result in unpacking a manifest an operation that rarely come cheap. Nevertheless, using a persistent nodemap provide a significant gain for some operations. For our measurementw, we use `hg cat --rev REV FILE` on the our reference mozilla-try. On this repository the persistent nodemap cache is about 29 MB in side for a total store side of 11,988 MB File with large history (file: b2g/config/gaia.json, revision: 195a1146daa0) no optimisation: 0.358s using mmap for index: 0.297s (-0.061s) persistent nodemap for changelog only: 0.275s (-0.024s) persistent nodemap for manifest too: 0.258s (-0.017s) File with small history (file: .hgignore, revision: 195a1146daa0) no optimisation: 0.377s using mmap for index: 0.296s (-0.061s) persistent nodemap for changelog only: 0.274s (-0.022s) persistent nodemap for manifest too: 0.257s (-0.017s) Same file but using a revision (8ba995b74e18) with a smaller manifest (3944829 bytes vs 10 bytes) no optimisation: 0.192s (-0.185s) using mmap for index: 0.131s (-0.061s) persistent nodemap for changelog only: 0.106s (-0.025s) persistent nodemap for manifest too: 0.087s (-0.019s) Differential Revision: https://phab.mercurial-scm.org/D8410

Matt Harbison - - Load All Authors

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      #ifndef _HG_COMPAT_H_

      #define _HG_COMPAT_H_

      #ifdef _WIN32

      #ifdef _MSC_VER

      #if _MSC_VER < 1900

      /* msvc 6.0 has problems */

      #define inline __inline

      #if defined(_WIN64)

      typedef __int64 ssize_t;

      typedef unsigned __int64 uintptr_t;

      #else

      typedef int ssize_t;

      typedef unsigned int uintptr_t;

      #endif

      typedef signed char int8_t;

      typedef short int16_t;

      typedef long int32_t;

      typedef __int64 int64_t;

      typedef unsigned char uint8_t;

      typedef unsigned short uint16_t;

      typedef unsigned long uint32_t;

      typedef unsigned __int64 uint64_t;

      #else

      /* VC++ 14 */

      #include <stdint.h>

      #if defined(_WIN64)

      typedef __int64 ssize_t;

      #else

      typedef int ssize_t;

      #endif

      #endif /* _MSC_VER < 1900 */

      #else

      /* not msvc */

      #include <stdint.h>

      #endif

      #else

      /* not windows */

      #include <sys/types.h>

      #if defined __BEOS__ && !defined __HAIKU__

      #include <ByteOrder.h>

      #else

      #include <arpa/inet.h>

      #endif

      #include <inttypes.h>

      #endif

      #if defined __hpux || defined __SUNPRO_C || defined _AIX

      #define inline

      #endif

      #ifdef __linux

      #define inline __inline

      #endif

      #endif

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				#ifndef _HG_COMPAT_H_
				#define _HG_COMPAT_H_

				#ifdef _WIN32
				#ifdef _MSC_VER
				#if _MSC_VER < 1900
				/* msvc 6.0 has problems */
				#define inline __inline
				#if defined(_WIN64)
				typedef __int64 ssize_t;
				typedef unsigned __int64 uintptr_t;
				#else
				typedef int ssize_t;
				typedef unsigned int uintptr_t;
				#endif
				typedef signed char int8_t;
				typedef short int16_t;
				typedef long int32_t;
				typedef __int64 int64_t;
				typedef unsigned char uint8_t;
				typedef unsigned short uint16_t;
				typedef unsigned long uint32_t;
				typedef unsigned __int64 uint64_t;
				#else
				/* VC++ 14 */
				#include <stdint.h>

				#if defined(_WIN64)
				typedef __int64 ssize_t;
				#else
				typedef int ssize_t;
				#endif
				#endif /* _MSC_VER < 1900 */

				#else
				/* not msvc */
				#include <stdint.h>
				#endif
				#else
				/* not windows */
				#include <sys/types.h>
				#if defined __BEOS__ && !defined __HAIKU__
				#include <ByteOrder.h>
				#else
				#include <arpa/inet.h>
				#endif
				#include <inttypes.h>
				#endif

				#if defined __hpux \|\| defined __SUNPRO_C \|\| defined _AIX
				#define inline
				#endif

				#ifdef __linux
				#define inline __inline
				#endif

				#endif