public void String8_ToIntegerPerformance()
{
string one = "123456789";
String8 one8 = one.TestConvert();
long value = 0;
long sum = 0;
int iterations = 1 * 1000 * 1000;
Stopwatch w = Stopwatch.StartNew();
for (int i = 0; i < iterations; ++i)
{
one8.TryToLong(out value);
sum += value;
}
w.Stop();
sum = 0;
Stopwatch w2 = Stopwatch.StartNew();
for (int i = 0; i < iterations; ++i)
{
long.TryParse(one, out value);
sum += value;
}
w2.Stop();
// Validate TryToLong is at least 2x as fast as long.TryParse
Assert.IsTrue(w.ElapsedMilliseconds * 2 < w2.ElapsedMilliseconds);
Trace.WriteLine($"{w.ElapsedMilliseconds:n0}ms String8.TryToLong; {w2.ElapsedMilliseconds:n0}ms long.TryParse.");
}
private static void TryNumberConversions(string value)
{
String8 value8 = value.TestConvert();
// .NET Parses "-0" successfully as int and long, but not ulong.
// I don't want "-0" to be considered valid on any parse.
if (value == "-0")
{
value = "Invalid";
}
int expectedInt, actualInt;
Assert.AreEqual(int.TryParse(value, out expectedInt), value8.TryToInteger(out actualInt));
Assert.AreEqual(expectedInt, actualInt);
long expectedLong, actualLong;
Assert.AreEqual(long.TryParse(value, out expectedLong), value8.TryToLong(out actualLong));
Assert.AreEqual(expectedLong, actualLong);
ulong expectedULong, actualULong;
Assert.AreEqual(ulong.TryParse(value, out expectedULong), value8.TryToULong(out actualULong));
Assert.AreEqual(expectedULong, actualULong);
}
