Yes, that link has some related information, including
(but not limited to :)
- PERL_DEBUG_MSTATS
- perl -V:d_mymalloc

I will use those in my case.

It's pity that perl does not have a possibility to acquire such information during execution (AFAIK, Java hase one, but I'm not sure). But I can live without that information provided I have great speed gains for ordinary programs execution :)
Vadim