xenonflash

4 ms·

1.
by xenonflash 12y ago
Yes I'm assuming two's complement, but there's not a lot of hardware around these days that isn't two's complement. I'm writing a library for something that already assumes two's complement while doing oth
2.
by xenonflash 12y ago
He also picked one of the most trivial cases - unsigned addition. Signed data, especially signed multiplication, requires a lot more steps. I'm working on a set of numerical problems in C now that involve checking for integer overflow.
3.
by xenonflash 13y ago
The Unladen Swallow project (faster Python, including an LLVM based JIT) found that LLVM wasn't really designed as a universal JIT compiler, or at least not one that was useful for languages such as Python. That was one of the reasons
4.
by xenonflash 13y ago
Have a look at the lines starting at line 821 in the very file you referenced. I have quoted a bit of it here: "Computed GOTOs, or the-optimization-commonly-but-improperly-known-as-"threaded code" using gcc's labels-as-v
5.
by xenonflash 13y ago
Pystone isn't a performance benchmark, or at least it isn't a useful one. It's more of a regression test to see if anything has changed between versions. It's not useful as a performance benchmark because it doesn't
6.
by xenonflash 13y ago
I don't think its correct to say the CPython is slow. What you can more accurately say about CPython is that the performance is highly variable. Some things are very fast, while others are comparatively slow. The slow things tend to be
7.
by xenonflash 13y ago
It's also used in CPU intensive applications, but the "standard" numerical libraries (Numpy/SciPy) aren't distributed with the language standard libraries. However, they're FOSS, available pretty much anywhere
8.
by xenonflash 13y ago
If you don't have a lot of experience with Python you may not know how some of the "magic" parts actually work inside. Some of the things you can do however will end up allocating a lot of memory with extra copies of data tha
9.
by xenonflash 14y ago
1) The Python version has some basic newbie coding errors. This sort of code is what Python programmers call "Java written in Python". It may be a valid algorithm in Java, but it's the wrong way to do it in Python. Code like this will work,