Fastest way to remove first char in a String

Say we have the following string

string data= "/temp string";

If we want to remove the first character / we can do by a lot of ways such as :

data.Remove(0,1);
data.TrimStart("https://stackoverflow.com/");
data.Substring(1);

But, really I don’t know which one has the best algorithm and doing that faster..
Is there a one that is the best or all are the same ?