Note that you may also use the substr function in a while loop.

It is probably faster than a regex or a split, but unpack is likely to be the fastest solution (if speed matters in your case). This is a link to a post where I used several different methods to solve your exact problem and to a benchmark on those various methods I did some time ago: Re: Performance problems on splitting long strings.

In reply to Re: How to split a string based on character(s) length by Laurent_R
in thread How to split a string based on the length of a sequence of characters within the string by thanos1983

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