[RESOLVED] String IndexOf and Remove VS Regex

Hi!

I have a string with 60000+ characters. I look for informations inside the string in a sequentially order. Every time I found a information I delete whatever is behind that information. In other words I reduce the size of the string every time I find something, and I do this using IndexOf and Remove, much like this:

vb.net Code:

Str = Str.Remove(0, Str.IndexOf("MyInfo"))

This can be quite heavy on the processor. So my question is it faster to look the informations using Regex or it would be about the same?

Hey,

In terms of string manipulation, Regular Expressions are about as optimised as you can get, so I would suggest that you will see a performance improvement in using Regex.

Give it a try and see.

You could use the StopWatch Class to get some timings to compare both methods.

Gary

Just changed everything to Regex.

Hey,

Good man!! I like Regex :)

Gary

Now, so do I! Regex rocks!!

One thing that I will point out is a very nice little application for creating Regular Expressions, it's called RegExBuddy, you can find a link to it in my signature. It isn't free, but there is a trial version to see if you like it.

Also, if you haven't found it yet, have a look at RegExLib, also in my signature.

Gary