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From: =?ISO-8859-1?Q?Sven_K=F6hler?= <remove-sven.koehler@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Autoboxing and Performance ?
Date: Thu, 22 Aug 2013 08:08:49 +0300
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Am 22.08.2013 01:43, schrieb Arne Vajhøj:
> And C# that was born with int as an object and therefore did
> not get wrapper classes later had to add int? to get a
> nullable int.

So C# distinguishes between int and int? - the former being non-nullable
and the latter being nullable.

I can easily subscribe to the point of view, that C# does everything
such that the programmer is provided with the illusion that a variable
of type int is actually an object. However, I wonder whether converting
int to int? and back again might not be implemented using some form of
boxing and unboxing - maybe even with a comparable performance hit.
Certainly, the (un)boxing can be optimized away in some cases - but not
all of them.


Regards,
  Sven