[Libusb-win32-devel] How Fast?

[Brad K. <kin...@ho...>]

What is the practical sustained speed limit I should expect when using the 
usb_bulk_read and usb_bulk_write calls? I'm seeing a limit of about 20MB/sec 
when talking to a PXI NetChip peripheral card and another custom board. I'm 
not sure if its the libusb side or the peripheral side that is limiting me 
to 20MB/sec.

In a tight loop that sends 1GB of data, I send 150MB in each usb_bulk_write 
call in order to get up to the 20MB/sec speed I'm seeing. As I drop the size 
down for each write, the sustained rate decreases also.

Thanks in advance for your help.
Brad

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