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March 2017

23 participants
22 discussions

Numpy on PyPy : cpyext
by Singh, Yashwardhan March 4, 2017

March 4, 2017

Hi Everyone, I am using numpy on pypy to train a deep neural network. For my workload numpy on pypy is taking twice the time to train as numpy on Cpython. I am using Numpy via cpyext. I read in the documentation, "Performance-wise, the speed is mostly the same as CPython's NumPy (it is the same code); the exception is that interactions between the Python side and NumPy objects are mediated through the slower cpyext layer (which hurts a few benchmarks that do a lot of element-by-element array … [View More]

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Disassembling methods called by LOOKUP_METHOD
by Frank Wang March 3, 2017

March 3, 2017

Hi, I'm trying to figure out the opcodes that the "append" function calls for arrays. When I use the dis tool, it just says that it looks up a method "append" using the LOOKUP_METHOD opcode. Is there a tool that allows me to disassemble built-in functions like "append", or what the best way to do this is? Thanks, Frank

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