Since our systems are not real-time, saying 'hi-res timer' and 'event
dispatching' together may need some clarification.
Lets say we set delay=0.001 - but not every system can guarantee that the
timer event will fire at precise 1 ms interval. So it can "skip a bit" or
fire at longer delay, then continue at 1 and so on. Some systems may skip
more then a bit :-) That's why popular way to implement animations is to
request high frequency callback and query hi-res timer from the handler for
actual advance calculation...
The spec could explicitly point that out ('delay' -> 'delayAtLeast' ?), and
perhaps recommend to use Date() in the event handler to see what is the
actual time of firing, or have an 'eventTime' property on an Event object.On a separate note, it almost feels that just adding invokeAsSoonAsPossible(handler) that is equivalent to unclamped setTimeout(..., 0) could be all that's needed. Dmitry On Wed, Oct 1, 2008 at 9:59 AM, Justin Haygood <[EMAIL PROTECTED]> wrote: > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Maciej > Stachowiak > Sent: Wednesday, October 01, 2008 1:02 PM > To: Darin Adler > Cc: WebKit Development > Subject: Re: [webkit-dev] Proposed Timer API > > > On Oct 1, 2008, at 9:58 AM, Darin Adler wrote: > > > On Oct 1, 2008, at 9:16 AM, Mike Belshe wrote: > > > >> If you're going to propose a new API designed for hi-res timers, it > >> ought to use units of microseconds instead of milliseconds. > > > > Or units of seconds, perhaps? Since JavaScript numbers are already > > floating point. > > That's what I would propose. Then browsers can offer greater precision > in the future without having to redesign the API. > > --- > > Updating now. Units of seconds. Precisision is browser defined, but will be > higher precision (or same precision) as setInterval/setTimeout. > > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev > -- Dmitry
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