Why don't you give it a try yourself. Create a file with a high ratio of lines to length, and read it in using a loop and string concat, or builder. Do it with

Why don't you give it a try yourself. Create a file with a high ratio of lines to length, and read it in using a loop and string concat, or builder. Do it with a builder first, when you get up to 1 minute, switch over to concat and see how long it takes.