top 8 entry from grpof of my app :-(

[%u]

Thanks for the info.

Sorry, I should mention the program do some game tree searching.  It need to
allocate some memory for each new node, and then do some calculation. In that
test, the total memory allocated is about 500M, and  take about 10 min.  I should
also mention most part of the run it only allocates memory, but doesn't release
much until the end when the program exits.