Re: [spi-devel-general] [PATCH] spi: add support for SPI over SuperH SCI pins

David Brownell
2008-01-22T05:26:32Z

On Monday 21 January 2008, David Brownell wrote:
> then it's not bad.  And it's twice as fast as going through
> a subroutine call for each bitop.  That's easily visible on

Minor clarification: twice as fast for loads involving lots
of medium-size buffers (1K+). Down from one minute(!) to put
new kernels to the only place that they can boot from ... it's
the usual case where a 5x speedup at one place is very visible,
but doesn't add up to 5x overall; other issues start to show
up more (like unchanged per-byte overheads).

- Dave