internal static int GetHash(Expression e)
{
var hashVisitor = new HashVisitor();
hashVisitor.Visit(e);
return(hashVisitor.Hash);
}
public void Benchmark()
{
int n = 1000;
Fake = new Fake {
Next = new Level {
Name = "Johan"
}
};
var sw = Stopwatch.StartNew();
for (int i = 0; i < n; i++)
{
var h = HashVisitor.GetHash(x => Fake.Next.Name); // Warming things up
}
sw.Restart();
for (int i = 0; i < n; i++)
{
var h = HashVisitor.GetHash(x => Fake.Next.Name);
}
sw.Stop();
var t1 = sw.Elapsed;
Console.WriteLine(
"Getting: this.Fake.Next.Name {0} times took: {1:F1} ms {2:F4} ms per call",
n,
sw.Elapsed.TotalMilliseconds,
sw.Elapsed.TotalMilliseconds / n);
sw.Restart();
for (int i = 0; i < n; i++)
{
Expression <Func <object, string> > expression = x => Fake.Next.Name;
var h = expression.ToString();
}
sw.Stop();
Console.WriteLine(
"expression.ToString() {0} times took: {1:F1} ms {2:F4} ms per call",
n,
sw.Elapsed.TotalMilliseconds,
sw.Elapsed.TotalMilliseconds / n);
}