Which is more efficient: replaceFirst () or replaceAll () with a bound regular expression?

We have a line String s = "first.second.third...n-1.n";

Which of the two regex approaches is more efficient in Java?

s = s.replaceFirst(".*?\\.", "");

or

s = s.replaceAll('^[^.]+[.]', '');

They do the same, but I wonder which one is faster?

The differences are as follows:

• using bound regular expression and replaceFirst()to match only the first instance

• using non-greedy *?versus non-point character class[^.]

• using the \\.literal vs. character class [.].

I would prefer an answer that evaluates or explains the performance effect of these separately.