function Start () {
    Profiler.logFile = "mylog.log";
    Profiler.enabled = true;
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void Start() {
        Profiler.logFile = "mylog.log";
        Profiler.enabled = true;
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def Start():
        Profiler.logFile = 'mylog.log'
        Profiler.enabled = true