Marketing of D - article topic ideas?
dsimcha
dsimcha at yahoo.com
Wed Jun 9 05:33:01 PDT 2010
== Quote from retard (re at tard.com.invalid)'s article
> Wed, 09 Jun 2010 01:13:43 -0400, Nick Sabalausky wrote:
> > "retard" <re at tard.com.invalid> wrote in message
> > news:hun6ok$13s5$1 at digitalmars.com...
> >> Tue, 08 Jun 2010 16:14:51 -0500, Andrei Alexandrescu wrote:
> >>
> >>> On 06/08/2010 04:05 PM, Walter Bright wrote:
> >>>> Andrei Alexandrescu wrote:
> >>>>> On 06/08/2010 01:27 PM, "Jérôme M. Berger" wrote:
> >>>>>> Please define "reasonable performance"...
> >>>>>
> >>>>> Within 15% of hand-optimized code specialized for the types at hand.
> >>>>
> >>>> I would have said O(n) or O(log n), as opposed to, say, O(n*n).
> >>>>
> >>>> General rules for performance improvements:
> >>>>
> >>>> 1. nobody notices a 10% improvement
> >>>>
> >>>> 2. users will start noticing speedups when they exceed 2x
> >>>>
> >>>> 3. a 10x speedup is a game changer
> >>>
> >>> max of n elements is O(n).
> >>
> >> This probably means that D 2 won't be very efficient on multicore until
> >> the authors learn some basic parallel programming skills. Now where did
> >> you get your PhD - I'm collecting a list of toy universities people
> >> should avoid.
> >
> > You used to have meaningful things to say. Now you're just trolling.
> Max of n unordered elements can be solved in O(log log n) time assuming
> you have enough cores and constant time memory access. Happy now?
Technically true, but when's the last time you needed to find the max of n
unordered elements, where n was large enough to justify the overhead of using even
2 threads? Even if you use some kind of pool, there's still the synchronization
overhead.
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