Re: Memory footprint ?

[Jeff Sturm <jsturm@cc42593-a.taylor1.mi.home.com>]

This program is different than your first example, which allocates 1000
java.lang.String objects, due to the concatenation operator.

The memory footprint is due mostly to libgcj's runtime and the garbage
collector, I'd assume.  The GC often starts up with a large heap, for
efficiency.  (I don't know what the Boehm collector is doing exactly, but
some releases of Sun's JDK preallocate 8MB of heap.)

--
Jeff Sturm
jsturm1@home.com


On Sat, 12 Jun 1999, Amancio Hasty Jr wrote:

> 
> Just out of curiosity I wrote a simple c++ hello program.
> 
> #include <iostream>
> int main() {
>         int i;
>         for (i = 0; i < 10000 ; i++) {
>         cout << "Hello" << "\n";
>         }
> }
> 
> 
> ls -ald /usr/lib/libstd*
> -r--r--r--  1 root  wheel  373754 May  7 23:03 /usr/lib/libstdc++.a
> lrwxr-xr-x  1 root  wheel      14 May  7 23:03 /usr/lib/libstdc++.so -> libstdc++.so.3
> -r--r--r--  1 root  wheel  274986 Apr 11 05:26 /usr/lib/libstdc++.so.2
> -r--r--r--  1 root  wheel  304674 May  7 23:03 /usr/lib/libstdc++.so.3
> -r--r--r--  1 root  wheel  348074 Apr  3 18:28 /usr/lib/libstdc++_p.a
> 
>  g++ -o test test.c++ -lstdc++
> root   95502  0.0  0.4  1004  468  p0  T     3:36AM   0:00.10 ./test
> 
> So the virtual size of the c++ hello program is about 3 times smaller
> than the gcj hello program.
> 
> 	Cheers,
> 	Amancio
>