Mail Archives: cygwin/2007/06/07/15:02:23
On Fri, Jun 08, 2007 at 02:46:19AM +0800, Samuel Thibault wrote:
>Lev Bishop, le Thu 07 Jun 2007 14:39:17 -0400, a ?crit :
>> On 6/7/07, Samuel Thibault wrote:
>> >Lev Bishop, le Thu 07 Jun 2007 13:41:44 -0400, a ?crit :
>> >> ...around 80MByte/sec, which maybe isn't as fast as it could be using
>> >> native functionality, but surely brltty doesn't need *that* much
>> >> bandwidth for transferring text?
>> >
>> >It doesn't need bandwidth, it needs latency.
>>
>> Latency is...
>> bash-3.2$ ./socat TCP-LISTEN:5001 PIPE & exec
>> 99<>/dev/tcp/127.0.0.1/5001 ; time for (( a=0; a<1000; a++ )); do echo
>> $a >&99; read <&99; done; exec 99>&-
>> [1] 4492
>>
>> real 0m1.959s
>> user 0m0.062s
>> sys 0m0.172s
>> bash-3.2$
>> [1]+ Done ./socat TCP-LISTEN:5001 PIPE
>>
>> ...about 2ms round-trip. How is this a problem?
>
>This adds up to the screen reader latency, etc.
>
>Really, we tried both, and while tcp/ip was a bit painful, local sockets
>were smooth.
What about unix domain sockets in cygwin? It sounds like you think they
aren't available.
cgf
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