Message75560
| Author |
vstinner |
| Recipients |
christian.heimes, gregory.p.smith, mark.dickinson, vstinner |
| Date |
2008年11月06日.11:30:56 |
| SpamBayes Score |
1.1834478e-10 |
| Marked as misclassified |
No |
| Message-id |
<1225971058.89.0.4974679456.issue4258@psf.upfronthosting.co.za> |
| In-reply-to |
| Content |
> I'll investigate the slowdowns
The problem may comes from int64_t on 32 bits CPU. 32x32 -> 64 may be
emulated on your CPU and so it's slower. I improved your patch to make
it faster, but I lost all my work because of a misuse of GIT... As I
remember:
- I fixed PyLong_FromLong() for small negative integer
- I unrolled the loop in PyLong_FromLong(): the loop is at least
called twice (the number has 2 digits or more)
- I added special code for operations on two numbers of 1 digit
(each) for long_add(), long_mul(), long_div(), long_bitwise(), etc.
- and I don't remember the other changes...
Oh, I have an old patch. I will attach it to this message. About
speed, it was:
* unpatched: 20600..20900 pystones
* your patch: 19900..20100 pystones
* + my changes: 20200..20400 pytones |
|