On Thu, 25 Feb 2016 13:31:26 +0800 Xiaofan Chen <xiaof...@gmail.com> wrote:
> I am not so sure if pyusb will allow you to reach the full potential. > > In order to have better speed, increase the transfer size, use async I/O > and then use an external HUB. > Again, very useful. Thanks! I rewrote the C program to see if it was faster than pyUSB, but without hub, the speed is _exactly_ the same. I have been testing up to 8192 bytes transfer size (I am limited with the device's memory). Tomorrow, I will add a test function to check async transfer. (It being tomorrow already, I did test using libusb in async mode, but there was no difference at all. If anything, it was 0.5 - 1% slower). I checked, the hub is a single TT version (Genesys Logic Inc). It does wonders at smaller transfer sizes. At 512, speed goes from 128kB/s to 508kB/s - wow! Cheers, John ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
