Hi again folks, This thread[1] about using Array.prototype.slice to copy arguments made me wonder whether the speed improvements I found had more to do with the fact my implementation of the new mechanism had its own copy- the-args function (which is faster than using `slice` on most browsers; see the thread for details) than with eliminating calls and function creation. And the answer is: No, but with the important caveat: On Chrome when using the "callSuper" helper, a big part of the gains were indeed down to the copy-the-args function instead of `slice`. If I modify my new mechanism to use `slice` instead (which obviously is the wrong way 'round, but never mind), when using the helper the new mechanism is only about 2X faster on Chrome than the old mechanism. Of course, Firefox got faster in that scenario (since Firefox is the one browser in my set of tests where using `slice` is faster than one's own copy function).
So summing up, the new mechanism remains faster across-the-board even using the helper, but the gains on Chrome will not be as marked (when using a helper) as they seem at present because of the difference in how args are copied. And of course, one of the great things about the new mechanism is that you don't have to copy args at all if you are willing to use the more verbose syntax. [1] http://groups.google.com/group/prototype-core/browse_thread/thread/cf8c287e231a0192# -- T.J. Crowder tj / crowder software / com www.crowdersoftware.com On Sep 4, 3:09 pm, "T.J. Crowder" <t...@crowdersoftware.com> wrote: > @Allen & @Jim, > > Gets my vote. > > -- T.J. :-) > > On Sep 4, 3:05 pm, Jim Higson <j...@wikizzle.org> wrote: > > > > > On Friday 04 September 2009 14:09:32 T.J. Crowder wrote: > > > > [...] I do _not_ mean that I > > > think "callSuper" is a great name; I don't and I expect suggestions > > > like yours to result in a better name. But something unlikely to > > > clash makes it simpler for people to do a global search-and-replace to > > > convert $super(...) to this.niftyNameHere(arguments, ...). > > > How about this.$super()? > > > -- > > Jim > > my wiki ajaxification thing:http://wikizzle.org > > my blog:http://jimhigson.blogspot.com/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Prototype: Core" group. To post to this group, send email to prototype-core@googlegroups.com To unsubscribe from this group, send email to prototype-core-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/prototype-core?hl=en -~----------~----~----~----~------~----~------~--~---
