Dear All,
I am not sure if i should open a ticket so I am writing here.
Remark: I am very new to python (1 week).
I found that small change improves max read transfer speed.
In my case from ~5MB/s to ~15MB/s (~15MB/s is the limit for this device).
The problem is in initialization of _interop.as_arrary
Example in libusb1.py in __read function the memory is allocated this way:
data = _interop.as_array((0,) * size)
this creates a tuple of size and then an array.
If you change initialization to
data = _interop.as_array( '\x00' * size )
makes it much faster.
Example speed test: http://dl.dropbox.com/u/2937630/code/array_init_test.py
For write - core.write could recognize if it receives type==array.array ant
not to reinitialize memory.
Best Regards,
Tomek
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