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| = Malloc Replacements = This page describes possible malloc (or PyMem_Malloc) replacements to be used for memory management in SAGE which is not directly controlled by Python as manual malloc calls, the GMP library etc. == OMalloc == * currently non-free * supposed to be very fast * drop-in ? == DLMalloc == * LGPL * used by OMalloc * unsure what it does == libCF old Memory Manager == * GPL * default memory manager for libCF * ZZ(3) + ZZ(5) with PyMem_Malloc: 8.21 microseconds, with the old libCF memory manager: 7.5 microseconds == libCF new Memory Manager == * GPL * crashed on me ([:MartinAlbrecht:malb]) when trying to use it from withing SAGE == GivMM == * GPL * {{{Short description of the Givaro memory mechanism: each request of sz bytes returns the smallest bloc that contains at least sz bytes. Each bloc begins by a private data used to store size information or a pointer. All free blocs are linked in list. The allocation algorithm search in the corresponding list a free bloc, before call the system "malloc" routine. 512 different sizes of bloc are predefined. The maximum bloc size is 8054880 bytes. For higher bloc, the manager directly call malloc/free of the underlaying system. }}} |
