I think it's about this bug in node.js https://github.com/joyent/node/pull/4194 setTimeout(..., 1) can sometimes behave as process.nextTick. Also setTimeout(..., 0) is the same to setTimeout(..., 1) because of this line: https://github.com/joyent/node/blob/v0.9.3/lib/timers.js#L175 and therefore can behave as nextTick too.
воскресенье, 4 ноября 2012 г., 17:09:42 UTC+7 пользователь Jorge написал: > > > > On 4 nov, 07:00, Alan Gutierrez <[email protected]> wrote: > > This gist... > > > > http://gist.github.com/4010472 > > > > ...contains a program that executes a function every millisecond using > > setInterval. It then uses setTimeout to executes a function every two > > milliseconds, then every millisecond, then it invokes a function > > repeatedly with a zero value (which is supposed to be reset to 1 > > according to the documentation.) Finally, it invokes a function > > repeatedly using nextTick. > > > > Using the high-resolution timer, the program samples the intervals and > > prints them to standard out. > > > > The setInterval function works as expected, invoking its callback at > > millisecond intervals. With a value of 2, setTimeout will invoke its > > callback after a two millisecond interval. With a value of 1 or 0, > > setTimeout calls back its callback immediately, in about two > > microseconds, a little bit faster than nextTick. > > > > Is this correct? I'd expect that setTimeout would always wait for at > > least a millisecond before invoking its callback. > > The setTimeout(ƒ,0) behaving as a nextTick(ƒ) is the proper behaviour > for a setTimeout(ƒ,0) with no clamping (the browsers clamp it to a > minimun of several ms, mainly due to a bug in jquery). > > But, the setTimeout(ƒ,1) behaving as a setTimeout(ƒ,0) is *clearly* a > bug. > > Node's timers have always been buggy -and still are- for example this: > > setTimeout(a,10), setTimeout(b,10) > > may fire a then b, or b then a, which is another bug. > > Cheers, > -- > Jorge. > -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en
