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

setdiscovery: precompute children revisions to avoid quadratic lookup...

setdiscovery: precompute children revisions to avoid quadratic lookup Moving away from dagutil a few commits ago introduced quadratic behavior when resolving children revisions during discovery. This commit introduces a precompute step of the children revisions to avoid the bad behavior. I believe the new code should have near identical performance to what dagutil was doing before. Behavior is still slightly different because we take into account filtered revisions. But this change was made when we moved off dagutil. I added a comment about multiple invocations of this function redundantly calculating the children revisions. I believe this potentially undesirable behavior was present when we used dagutil, as the call to inverse() previously in this function created a new object and required computing children on every invocation. I thought we should document the potential for a performance issue rather than let it go undocumented. Differential Revision: https://phab.mercurial-scm.org/D4326

Yuya Nishihara - - Load All Authors

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      #ifndef _HG_COMPAT_H_

      #define _HG_COMPAT_H_

      #ifdef _WIN32

      #ifdef _MSC_VER

      /* 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

      #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
				/* 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
				#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