Re: window.setTimeout
liorean <[email protected]> Wed, 11 Jul 2007 11:36:58 +0200
| Newsgroups | gmane.comp.web.dom.wdf |
|---|---|
| Message-ID | <[email protected]> |
--He8wdHoNfKsMamBRbOW8yy3Rx0GIxWqPoGWpeb3 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/07/07, Lon Boonen <[email protected]> wrote: > the internal clock of js is 60Hz. I think. > so the minimum mean interval is something like 16/2 = 8ms. > so your code takes at least 10.000 x 0.008 = 80s. Wrong. There is no internal clock in js. The clock functionality, including time frame size, is entirely based on the OS time frames and the browser vendor. I wrote a blog entry on this a while ago, including some timer resolution data if you're interested: <uri:http://web-graphics.com/2007/03/06/timer-resolutions-and-browsers/> On 11/07/07, Manni Schneiderbauer <[email protected]> wrote: > Gecko internally allows a minimum delay value of 15 ms, even if you give > it a 0, to avoid settimeouts eating up the whole CPU time. Probably the > other browsers have such a minimum delay too. Most browsers normalise the timer to at least 10ms if you give it a smaller value than that. If you're on a multicore Windows NT system or a Win9x/ME system the timer resolution of will be higher than 10ms though, so in effect it will end up more than 10ms. -- David "liorean" Andersson --He8wdHoNfKsMamBRbOW8yy3Rx0GIxWqPoGWpeb3 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> </head> <!-- Network content --> <body style="background-color: #ffffff;"> <!--~-|**|PrettyHtmlStartT|**|-~--> <div id="ygrp-mlmsg" style="width:655px; position:relative;"> <div id="ygrp-msg" style="width: 490px; padding: 0 15px 0 0; float:left; z-index:1;"> <!--~-|**|PrettyHtmlEndT|**|-~--> <div id="ygrp-text"> <p>On 10/07/07, Lon Boonen <<a href="mailto:lon%40q42.nl">[email protected]</a>> wrote:<br> > the internal clock of js is 60Hz. I think.<br> > so the minimum mean interval is something like 16/2 = 8ms.<br> > so your code takes at least 10.000 x 0.008 = 80s.<br> <br> Wrong. There is no internal clock in js. The clock functionality,<br> including time frame size, is entirely based on the OS time frames and<br> the browser vendor. I wrote a blog entry on this a while ago,<br> including some timer resolution data if you're interested:<br> <uri:<a href="http://web-graphics.com/2007/03/06/timer-resolutions-and-browsers/">http://web-graphics<wbr>.com/2007/<wbr>03/06/timer-<wbr>resolutions-<wbr>and-browsers/</a>><br> <br> On 11/07/07, Manni Schneiderbauer <<a href="mailto:manni%40manni.org">manni@manni.<wbr>org</a>> wrote:<br> > Gecko internally allows a minimum delay value of 15 ms, even if you give<br> > it a 0, to avoid settimeouts eating up the whole CPU time. Probably the<br> > other browsers have such a minimum delay too.<br> <br> Most browsers normalise the timer to at least 10ms if you give it a<br> smaller value than that. If you're on a multicore Windows NT system or<br> a Win9x/ME system the timer resolution of will be higher than 10ms<br> though, so in effect it will end up more than 10ms.<br> -- <br> David "liorean" Andersson<br> </p> </div> <!--~-|**|PrettyHtmlStart|**|-~--> <span width="1" style="color: white;">__._,_.___</span> <!-- Start the section with Message In topic --> <div id="ygrp-actbar"> <span class="left"> <a href="http://groups.yahoo.com/group/wdf-dom/message/5601;_ylc=X3oDMTM0cHJpazdyBF9TAzk3MzU5NzE0BGdycElkAzI1NjQ1NjMEZ3Jwc3BJZAMxNzA1MDE2MDYxBG1zZ0lkAzU2MDYEc2VjA2Z0cgRzbGsDdnRwYwRzdGltZQMxMTg0MTQ2ODIzBHRwY0lkAzU2MDE-"> Messages in this topic </a> (<span class="bld">0</span>) </span> <a href="http://groups.yahoo.com/group/wdf-dom/post;_ylc=X3oDMTJwb3NoODRlBF9TAzk3MzU5NzE0BGdycElkAzI1NjQ1NjMEZ3Jwc3BJZAMxNzA1MDE2MDYxBG1zZ0lkAzU2MDYEc2VjA2Z0cgRzbGsDcnBseQRzdGltZQMxMTg0MTQ2ODIz?act=reply&messageNum=5606"> <span class="bld"> Reply </span> (via web post) </a> | <a href="http://groups.yahoo.com/group/wdf-dom/post;_ylc=X3oDMTJlNnJmNnIxBF9TAzk3MzU5NzE0BGdycElkAzI1NjQ1NjMEZ3Jwc3BJZAMxNzA1MDE2MDYxBHNlYwNmdHIEc2xrA250cGMEc3RpbWUDMTE4NDE0NjgyMw--" class="bld"> Start a new topic </a> </div> <!------- Start Nav Bar ------> <!-- |**|begin egp html banner|**| --> <div id="ygrp-vitnav"> <a href="http://groups.yahoo.com/group/wdf-dom/messages;_ylc=X3oDMTJlMzZtamtpBF9TAzk3MzU5NzE0BGdycElkAzI1NjQ1NjMEZ3Jwc3BJZAMxNzA1MDE2MDYxBHNlYwNmdHIEc2xrA21zZ3MEc3RpbWUDMTE4NDE0NjgyMw--">Messages</a> </div> <!-- |**|end egp html banner|**| --> <!-- Do not have place to put it yet --> <div id="ygrp-grft"> </div> <!-- yahoo logo --> <!-- |**|begin egp html banner|**| --> <div id="ygrp-ft"> <a href="http://groups.yahoo.com/;_ylc=X3oDMTJkMG1ramViBF9TAzk3MzU5NzE0BGdycElkAzI1NjQ1NjMEZ3Jwc3BJZAMxNzA1MDE2MDYxBHNlYwNmdHIEc2xrA2dmcARzdGltZQMxMTg0MTQ2ODIz"> <img src="http://us.i1.yimg.com/us.yimg.com/i/yg/img/logo/ma_grp_160.gif" height="15" width="106" border="0" alt="Yahoo! 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