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Update README.md
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abaelen committed Sep 6, 2020
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Expand Up @@ -59,6 +59,13 @@ Further detail around some tests I did comparing the BULK, ie. standard data tra

no writing: 1 318 000 iterations

This test would therefore indicate it is certainly worthwhile to consider Isochronous datatransfers, in time critical applications.

What I did notice during my testing was that Windows will initialize an Isochronous datatransfer on an 8ms interval not faster.
Doing the math, one could conclude it is not faster than a normal Bulk transfer (which transmits 52bytes on 0.2ms). However the overhead that the Bulk transfer imposes on the processor seems to completely offset this as shown by the tests above.

This implies transmitting 1023bytes every 8ms, eg. 1x1023bytes/8ms or 2x1023/12ms or 3x1023/14ms, ....



Hope it can inspire you,
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