"id","type","ts","upid","heap_name","callsite_id","count","size"
0,"heap_profile_allocation",0,0,"malloc",0,1,1
1,"heap_profile_allocation",0,0,"malloc",0,-1,-1
2,"heap_profile_allocation",0,0,"custom",0,1,1
3,"heap_profile_allocation",0,0,"custom",0,-1,-1