Profiler.logFile

Description

Specifies the file to use when writing profiling data.

In addition to specifying a valid file path, you must set both Profiler.enabled and Profiler.enableBinaryLog to true in order to save profiling information.

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

public class ExampleClass : MonoBehaviour
{
    void Start()
    {
        Profiler.logFile = "mylog"; //Also supports passing "myLog.raw"
        Profiler.enableBinaryLog = true;
        Profiler.enabled = true;
    }
}