using D without GC

[Oleg B via Digitalmars-d-learn]

Hello. I want to try use D without GC and I'm not sure what I do 
all right.

import core.memory;
version( gcdis ) enum gc_disable = true;
else             enum gc_disable = false;

class Foo
{
    byte[][] buf;
    this()
    {
        foreach( i; 0 .. 32 )
            buf ~= new byte[]( 65536 * 16 );
    }
    ~this()
    {
        static if( gc_disable )
        {
            // no warning about deprecated 'delete'
            foreach( i; 0 .. 32 )
                delete buf[i];
            delete buf;
        }
    }
}

void main()
{
    static if( gc_disable ) GC.disable();

    foreach( i; 0 .. 200 )
        scope foo = new Foo;

    static if( gc_disable )
    {
        GC.enable();
        GC.collect();
    }
}

dmd -version=gcdis test.d && ./test "--DRT-gcopt=profile:1"
        Number of collections:  2
        Total GC prep time:  0 milliseconds
        Total mark time:  0 milliseconds
        Total sweep time:  0 milliseconds
        Total page recovery time:  0 milliseconds
        Max Pause Time:  0 milliseconds
        Grand total GC time:  0 milliseconds
GC summary:   51 MB,    2 GC    0 ms, Pauses    0 ms <    0 ms

dmd test.d && ./test "--DRT-gcopt=profile:1"
        Number of collections:  205
        Total GC prep time:  1 milliseconds
        Total mark time:  1 milliseconds
        Total sweep time:  5 milliseconds
        Total page recovery time:  0 milliseconds
        Max Pause Time:  0 milliseconds
        Grand total GC time:  8 milliseconds
GC summary:   69 MB,  205 GC    8 ms, Pauses    3 ms <    0 ms

I use this feature correctly?