| "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 |