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using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
namespace System.Data.Linq.SqlClient {
#if PERFORMANCE_BUILD
class PerfTimer {
long startTime;
long stopTime;
long frequency;
public PerfTimer() {
QueryPerformanceFrequency(out frequency);
}
public void Start() {
Thread.Sleep(0);
QueryPerformanceCounter(out startTime);
}
public void Stop() {
QueryPerformanceCounter(out stopTime);
}
public long Duration {
get { return (long)( 1000000.0 * (double)(stopTime - startTime) / (double) frequency ); }
}
[System.Runtime.InteropServices.DllImport("Kernel32.dll")]
private static extern bool QueryPerformanceCounter(out long count);
[System.Runtime.InteropServices.DllImport("Kernel32.dll")]
private static extern bool QueryPerformanceFrequency(out long frequency);
}
#endif
}
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