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Re: How to write a browser based timer

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Gene Wirchenko wrote on 22 feb 2012 in comp.lang.javascript:

> On 21 Feb 2012 22:40:08 GMT, "Evertjan."
> <exjxw.hannivoort@interxnl.net> wrote:
> 
>>Gene Wirchenko wrote on 21 feb 2012 in comp.lang.javascript:
> 
> [snip]
> 
>>>      Following the clock will be somewhat more CPU-intensive.
>>
>>Not at all.
> 
>      I am thinking yes, it will be more intensive, because the
> updating must be more often to avoid having jerky output.  If the hit
> is still not that much, well and good.

200ms is enough, please try it out,
but even if it were each 50ms,
the CPU use would be do very-very-very low.

No incrementing is done, just new Date() and some adding,
and a DOM-innerHTML write.

>      (I am leery of anything approaching busy wait, because it can
> really suck up the CPU time.)

What is "busy wait"??

setTimeout() does not take cpu-time until it fires at the end, 
since it is just an added task at the general CPU-interrupt stack,
if that is what you mean. This task runs anyway on each machine's OS.


-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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Thread

How to write a browser based timer " Cal Who" <CalWhoNOSPAM@roadrunner.com> - 2012-02-21 15:50 -0500
  Re: How to write a browser based timer Scott Sauyet <scott.sauyet@gmail.com> - 2012-02-21 13:04 -0800
    Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-21 13:45 -0800
      Re: How to write a browser based timer "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-02-21 22:40 +0000
        Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-21 15:04 -0800
          Re: How to write a browser based timer "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-02-21 23:27 +0000
            Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-21 16:08 -0800
              Re: How to write a browser based timer "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-02-22 15:41 +0000
                Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-22 09:19 -0800
                Re: How to write a browser based timer "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-02-22 21:55 +0000
                Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-22 15:01 -0800
        Re: How to write a browser based timer RobG <rgqld@iinet.net.au> - 2012-02-21 18:18 -0800
          Re: How to write a browser based timer Dr J R Stockton <reply1208@merlyn.demon.co.uk> - 2012-02-23 19:31 +0000
            Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-23 16:38 -0800
              Re: How to write a browser based timer Dr J R Stockton <reply1208@merlyn.demon.co.uk> - 2012-02-25 20:29 +0000
                Re: How to write a browser based timer "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-02-26 23:02 +0000
      Re: How to write a browser based timer Dr J R Stockton <jrs@merlyn.demon.co.uk> - 2012-02-22 18:51 +0000
    Re: How to write a browser based timer " Cal Who" <CalWhoNOSPAM@roadrunner.com> - 2012-02-23 10:23 -0500
      Re: How to write a browser based timer Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-23 22:13 +0100
        Re: How to write a browser based timer Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-24 09:41 +0100

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