It assumes no count will be greater than 256. If that's too small, change the three 8s to 16s

Actually, the 8s give a max count of 255 (0b00000000 .. 0b11111111, where 0b11111111 == 255)

16s will give you counts up to 65535 (0b1111111111111111).

In reply to Re^4: Memory usage while tallying instances of lines in a .txt file by RonW
in thread Memory usage while tallying instances of lines in a .txt file by TJCooper

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