[Chicken-janitors] Re: #286: utc-time->seconds is abysmally slow on OS X

[Chicken Trac]

#286: utc-time->seconds is abysmally slow on OS X
---------------------------------------------+------------------------------
 Reporter:  zbigniew                         |       Owner:       
     Type:  enhancement                      |      Status:  new  
 Priority:  major                            |   Milestone:       
Component:  core libraries                   |     Version:  4.5.x
 Keywords:  utc-time->seconds slow molasses  |  
---------------------------------------------+------------------------------
Changes (by zbigniew):

  * priority:  not urgent at all => major


Comment:

 In the patch above, I enabled the portable timegm() included in Chicken,
 normally used only for SVR4 which lacks this extension, and the results
 were 25 times faster on OS X:

 {{{
 0.863s CPU time, 0.011s GC time (major), 200783 mutations, 5/14 GCs
 (major/minor)
 real    0m2.310s
 }}}

 A far cry from Linux and still 10x slower than local-time->seconds on OS
 X, but it beats the heck out of the terrible native code.

 Whether this issue still exists on 10.6 is another question, I don't have
 it to test on (please pipe up if anybody does).  I don't really want to
 activate this fix if a native fast timegm() is available in Snow Leopard,
 but it looks pretty important to include it on OS X 10.5.

 If someone wants to test the speed on FreeBSD or NetBSD with and without
 the patch, that might be good too.

-- 
Ticket URL: <http://www.irp.oist.jp/trac/chicken/ticket/286#comment:1>
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