Profiler.GetMonoUsedSizeLong

Returns

long A long integer value of the memory in use. This returns 0 if the Profiler is not available.

Description

The allocated managed-memory for live objects and non-collected objects.

This function returns the amount of allocated managed-memory for all objects, both live and non-collected. Always call GC.Collect() before calling this function as non-referenced objects will still take up space until they are collected by the garbage collector (GC). Note that this will return an ever increasing value until GC.Collect() is called.

using UnityEngine;
using System.Collections;
using UnityEngine.Profiling;

public class ExampleClass : MonoBehaviour
{
    void Update()
    {
        System.GC.Collect();
        Debug.Log("Mono used size" + Profiler.GetMonoUsedSizeLong() + "Bytes");
    }
}