I measured ca. 100kBytes/s w/ZY1000 and
MCB1700/LPC1768.

The ZY1000 has the advantage of low latency
between OpenOCD and the JTAG interface, whereas
a USB interface has a 1ms roundtrip time.

Generally to improve performance of high latency devices,
your best bet is to do some profiling and figure
out whether it's possible to rewrite the OpenOCD
higher level code to issue longer clock/in out sequences.

If you don't have working area memory set up, or
your flash algorithm does not execute on the target,
then that can easily explain pitiful performance. Again
a low latency interface would do comparably better here...

--
Øyvind Harboe
US toll free 1-866-980-3434 / International +47 51 63 25 00
http://www.zylin.com/zy1000.html
ARM7 ARM9 ARM11 XScale Cortex
JTAG debugger and flash programmer
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