String.Replace() vs. StringBuilder.Replace()

Question

I have a string in which I need to replace markers with values from a dictionary. It has to be as efficient as possible. Doing a loop with a string.replace is just going to

Answer 1

Converting data from a String to a StringBuilder and back will take some time. If one is only performing a single replace operation, this time may not be recouped by the efficiency improvements inherent in StringBuilder. On the other hand, if one converts a string to a StringBuilder, then performs many Replace operations on it, and converts it back at the end, the StringBuilder approach is apt to be faster.