From: Roger Pack <rogerdpack2@...>
Date: 2010-01-26T04:43:45+09:00
Subject: [ruby-core:27830] Re: [Bug #2637] unable to select for < 0.1s in 	windows

Thanks--it works now!

I have noticed that it is still a bit slow, though...it now takes
0.015s per select (with 1.8.6 it takes 0.0000015s per select)
Any ideas there?

gprof didn't seem helpful narrow down the cause (here it selects 20 times)

  %   cumulative   self              self     total
 time   seconds   seconds    calls  ms/call  ms/call  name
 12.50      0.01     0.01    58976     0.00     0.00  rb_econv_convert0
 12.50      0.02     0.01    58911     0.00     0.00  fill_cbuf
 12.50      0.03     0.01    24697     0.00     0.00  vm_xmalloc
 12.50      0.04     0.01    18952     0.00     0.00  rb_enc_from_index
 12.50      0.05     0.01    16886     0.00     0.00  compile_data_alloc
 12.50      0.06     0.01     6159     0.00     0.00  node_newnode
 12.50      0.07     0.01     4556     0.00     0.00  st_add_direct
 12.50      0.08     0.01       21     0.48     0.48  rb_w32_select@20
  0.00      0.08     0.00   100662     0.00     0.00  filetime_to_timeval
  0.00      0.08     0.00   100626     0.00     0.00  gettimeofday
  0.00      0.08     0.00   100541     0.00     0.00  do_select
  0.00      0.08     0.00   100541     0.00     0.00  subtract
  0.00      0.08     0.00   100520     0.00     0.00  compare