cPickle.load vs. file.read+cPickle.loads on large binary files

[Nagy László Zsolt]

> Perhaps there is a size threshold? You could experiment with different block 
> sizes in the following f.read() replacement:
>
> def read_chunked(f, size=2**20):
>     read = functools.partial(f.read, size)
>     return "".join(iter(read, ""))
>
Under win32 platform, my experience is that the fastest way to read
binary file from disk is the mmap module. You should try that too.