3 Jul
2017
3 Jul
'17
8:05 a.m.
2017-07-03 6:52 GMT+02:00 Siyuan Ren
The current PyLong implementation represents arbitrary precision integers in units of 15 or 30 bits. I presume the purpose is to avoid overflow in addition , subtraction and multiplication. But compilers these days offer intrinsics that allow one to access the overflow flag, and to obtain the result of 64 bit multiplication as a 128 bit number.
The question is the performance. Is it fast? :-) You can try to write a patch and run a benchmark. See for example http://pyperformance.readthedocs.io/ for benchmarks. Victor