Ma Lin <malin...@163.com> added the comment:
I'm working on a patch. lzma decompressing speed increases: baseline: 0.275722 sec patched: 0.140405 sec (Uncompressed data size 52.57 MB) The new algorithm looks like this: #define INITIAL_BUFFER_SIZE (16*1024) static inline Py_ssize_t get_newsize(Py_ssize_t size) { const Py_ssize_t MB = 1024*1024; const Py_ssize_t GB = 1024*1024*1024; if (size <= 1*MB) { return size << 2; // x4 } else if (size <= 128*MB) { return size << 1; // x2 } else if (size <= 1*GB) { return size + (size >> 1); // x1.5 } else if (size <= 2*GB) { return size + (size >> 2); // x1.25 } else { return size + (size >> 3); // x1.125 } } ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue41265> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com