Message118103
| Author |
pitrou |
| Recipients |
Aahz, aahz, mark.dickinson, pitrou, rhettinger, stutzbach |
| Date |
2010年10月07日.11:56:24 |
| SpamBayes Score |
0.0002632347 |
| Marked as misclassified |
No |
| Message-id |
<1286452590.11.0.255060275257.issue10044@psf.upfronthosting.co.za> |
| In-reply-to |
| Content |
This is an experimental patch to optimize some operations on small ints.
pystone is 5-10% faster, pybench 2-3% faster, and here are some relevant benchmarks from unladen swallow:
### nbody ###
Min: 0.345136 -> 0.317502: 1.09x faster
Avg: 0.346827 -> 0.319561: 1.09x faster
Significant (t=79.50)
Stddev: 0.00140 -> 0.00198: 1.4084x larger
### nqueens ###
Min: 0.339744 -> 0.313506: 1.08x faster
Avg: 0.342630 -> 0.315380: 1.09x faster
Significant (t=73.41)
Stddev: 0.00218 -> 0.00146: 1.4931x smaller
If the principle gets accepted, we could experiment with further optimizations such as dedicated opcodes for addition-with-int-constant, subscripting-with-int-constant, etc. |
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