On Fri, 14 Nov 2008 08:48:53 +0900, Bill Baxter wrote: > On Fri, Nov 14, 2008 at 7:49 AM, Moritz Warning <[EMAIL PROTECTED]> > wrote: >> On Thu, 13 Nov 2008 06:19:27 -0500, bearophile wrote: >> >>> In this post I show few things I have found/collected in the last >>> weeks related to the performance of the code compiled with DMD. >>> >> [..] >>> >>> The D1 docs strongly suggest to use foreach every time it's possible, >>> avoiding to use the less handy for(), so for almost a year I have >>> assumed foreach is as fast as the for() but this two versions shows >>> differences: >>> >>> >> I have noticed the same problem with foreach. A for loop is often >> faster. :/ > > One thing to be clear about when talking about the speed of foreach is > whether you're using it on a built-in array or on a user type with an > opApply. The former is expected to be as fast as for(), the latter is > definitely not because it has to call a delegate each time around the > loop.
Nobody would use "for"-loops with opApply in real world code. :P
