public void TestDoubleToString(string expected, double value)
{
StringWriter writer = new StringWriter();
Grisu.DoubleToString(value, writer);
Assert.AreEqual(expected, writer.ToString());
}
private void CheckDoubleToStringEquals(string expected, double value)
{
StringWriter writer = new StringWriter();
Grisu.DoubleToString(value, writer);
Assert.AreEqual(expected, writer.ToString());
}
public void TestPerformance()
{
Random r = new Random(1);
double[] values = new double[1000000];
for (int i = 0; i < values.Length; ++i)
{
values[i] = (r.NextDouble() - 0.5) * Math.Pow(10, r.NextDouble() * 308);
}
StringWriter writer = new StringWriter();
Stopwatch sw = new Stopwatch();
sw.Start();
for (int i = 0; i < values.Length; ++i)
{
//builder.AppendFormat("{0:R}", values[i]);
writer.Write(values[i].ToString("R"));
//builder.Append(values[i]);
}
sw.Stop();
Console.WriteLine("builtin length: " + writer.ToString().Length);
Console.WriteLine("builtin time: " + sw.ElapsedMilliseconds);
if (values.Length < 100)
{
Console.WriteLine(writer.ToString());
}
writer = new StringWriter();
sw = new Stopwatch();
sw.Start();
for (int i = 0; i < values.Length; ++i)
{
Grisu.DoubleToString(values[i], writer);
}
sw.Stop();
Console.WriteLine("grisu length: " + writer.ToString().Length);
Console.WriteLine("grisu time: " + sw.ElapsedMilliseconds);
if (values.Length < 100)
{
Console.WriteLine(writer.ToString());
}
}
