Yes, by all means, if you can identify sections or chunks where you can be sure that there cannot be an overlapping match on the chunk boundary, then you don't even need a sliding window: just load and process one chunk after another just the same way you've been told before for the whole file, it is even simpler than a sliding window.

In reply to Re^3: Regexp matching on a multiline file: dealing with line breaks by Laurent_R
in thread Regexp matching on a multiline file: dealing with line breaks by BlueStarry

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