Hello,
Enumerating USB devices on the host buses may be quite time consuming.
I need to enumerate these devices a couple of times at startup, and pyusb does
not cache the results.
The net performance penalty here is 0.7 second per "core:find" call, which slow
down my application start up time.
What would be the recommended way to implement some kind of cache so that the
physical enumeration only occurs once during a Python runtime session?
Moreover, is there a simple way to disable the methodloggers in order to save
time as well?
Thanks,
Manu
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 2.242 2.242 <string>:1(<module>)
1 0.002 0.002 2.242 2.242 {execfile}
1 0.002 0.002 2.240 2.240 pyterm.py:30(<module>)
1 0.000 0.000 2.234 2.234 pyterm.py:189(main)
1 0.000 0.000 2.232 2.232 pyterm.py:42(__init__)
1 0.000 0.000 2.232 2.232 pyterm.py:141(_open_port)
1 0.000 0.000 2.214 2.214 serialutil.py:212(__init__)
1 0.000 0.000 2.214 2.214 ftdiext.py:110(open)
1 0.000 0.000 2.213 2.213 ftdi.py:250(usb_find_all)
1 0.000 0.000 2.213 2.213 ftdi.py:689(_enumerate)
31 0.000 0.000 2.194 0.071 _debug.py:47(do_trace)
3 0.001 0.000 2.187 0.729 core.py:734(find)
4 0.000 0.000 2.171 0.543 core.py:803(device_iter)
3 0.000 0.000 2.168 0.723 libusb10.py:409(enumerate_devices)
3 2.168 0.723 2.168 0.723 libusb10.py:395(__init__)
1 0.000 0.000 0.025 0.025 util.py:221(get_string)
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