On C/C++ undefined behaviours

[Nick Sabalausky]

"retard" <re at tard.com.invalid> wrote in message 
news:i4rqp4$1egl$2 at digitalmars.com...
> Sun, 22 Aug 2010 17:50:06 +0200, Andrej Mitrovic wrote:
>
>> Quake 2 is a 13 year old game. :)
>>
>
> The original argument was that Java code is slow, no matter what you're
> trying to do. What kind of performance levels are you expecting?
>


Nobody said that.  Java apps just tend to be slower than C/C++/D ones. 
Strutting out a GPU-bound game that was well-known to run blazingly fast on 
sub-GHz hardware in *software* rendering mode, and saying "Look it's a few 
hundred fps on my multi-core" doesn't really do much to disprove that.


>
> http://dotnot.org/blog/archives/2008/03/10/xml-benchmarks-updated-graphs-
> with-rapidxml/
>
> It appears that in XML parsing Java is actually 5..10 times faster than
> D1/Phobos. Maybe D2/Phobos has finally fixed these issues.

Phobos's XML is known to be half-baked. That same link indicates that 
D1/Tango's XML beats the snot out of Java's. Yes, part of that is due to 
some details of the way Tango goes about it, but it's things that D makes 
easy and natural. Trying to do the same techniques on Java would be a bit of 
an uphill battle.