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I have a regular expression like \r?\n\r?\n. I can write it as (\r?\n){2} using the exact same number of characters.
Is there any difference performance wise between the two? Or a best practices for this kind of situation.
Here is a JSPerf to show that using a repeating pattern is a lot faster than using
{2}: http://jsperf.com/js-repeated-regexp-or-specific-number-of-sequences