infinite compilation loop, differences

[Rakotomandimby Mihamina]

Hi,
I am loop compiling a kernel src.rpm with
(it's a zsh shell)

$ cd /usr/src
$ while (1=1) do :
  {
    rpmbuild -ba --target=i686 kernel-2.6.spec
  }
  done

Then, each binary has not the same size.
Is it normal?
I tried loop compilation because sometimes I had random segfaults so the
loop would force the compilation (2hours and something on my sempron...)
although it segfaults. what's the reason of the difference between the
resulting binary rpms?

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