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If I have a delimited text file with a basic delimiter (say | for instance) does it make a difference whether I use a String or a Regex split?
Would I see any performance gains with one versus the other?
I am assuming you would want to use Regex.Split if you have escaped delimiters that you don’t want to split on (\| for example).
Are there any other reasons to use Regex.Split vs String.Split?
Regex.Split is more capable, but for an arrangement with basic delimitting (using a character that will not exist anywhere else in the string), the String.Split function is much easier to work with.
As far as performance goes, you would have to create a test and try it out. But, don’t pre-optimize, unless you know that this function will be the bottleneck for some essential process.