The size of the data doesn't matter, it's the maximum size of the regex which counts. Suppose you have a maximum regex size of n, then your chunk size should be n (or greater). The algorithm is then:

  1. load 1 chunk into RAM
  2. load another chunk into RAM
  3. concatenate the 2 chunks for testing
  4. Discard the older chunk
  5. Goto 2

HTH.

In reply to Re^4: Possible to have regexes act on file directly (not in memory) by hippo
in thread Possible to have regexes act on file directly (not in memory) by Nocturnus

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