From: khaines@...
Date: 2007-04-27T05:06:43+09:00
Subject: Re: 10 millisecond delay/callback

On Fri, 27 Apr 2007, Earle Clubb wrote:

> I need to perform a task every 10ms.  I've been using
> kernel.sleep(0.01), but sleep seems to be slow and erratic at sub-second
> resolutions.  Here's a test I ran along with the results:
>
> irb(main):001:0> 0.upto(25) do
> irb(main):002:1* puts Time.now.usec/1000
> irb(main):003:1> STDOUT.flush
> irb(main):004:1> sleep 0.01
> irb(main):005:1> end
> 105
> 132
> 143
> 162
> 191

Try select()
----
irb(main):005:0> 0.upto(25) do
irb(main):006:1* select(nil,nil,nil,0.01)
irb(main):007:1> puts Time.now.usec/1000
irb(main):008:1> end
138
148
158
168
178
188
198
208
218
228
238
248
258
268
278
288
298
308
318
328
338
348
358
368
378
388



Kirk haines