What is fastest: (int), Convert.ToInt32(x) or Int32.Parse(x)?

Question

Which of the following code is fastest/best practice for converting some object x?

int myInt = (int)x;

or

int myInt = Convert.T         


        

Answer 1

Someone's already done the benchmarking. Here are the results. The fastest way if you know what you're converting will always be a valid int, is to use the following method (which a few people have answered above) :

int value = 0;
for (int i = 0; i < str.Length; i++)
{
    value = value * 10 + (str[i] - '0');
}

Other techniques that were benchmarked were:

• Convert.ToInt32
• Int32.TryParse
• int.Parse