Re^6: question about reg exp engine

Changing " stuff " to (' ' x 1000) . 'x' . (' ' x 1000) gives:

       Rate    r1    r3
r1   1849/s    --  -99%
r3 166166/s 8888%    --
[download]

It is important that a benchmark test what you think it is testing so what you think is being tested must entail a significant portion of the benchmark's processing time.

Update: BTW, my result for your original benchmark was:

       Rate   r1   r3
r1 767220/s   -- -10%
r3 855450/s  11%   --
[download]

Perl reduces RSI - it saves typing

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Re^7: question about reg exp engine by broomduster (Priest) on Aug 04, 2008 at 00:43 UTC
I didn't see this reply before I Updated above, but now we're in the same direction, even if the magnitude of difference is off. As I said earlier, the largest difference I saw for the short string was 3% (about a dozen runs, looking back). BTW, I can confirm your observation about the penalty associated with 'nibble' vs. 'swallow' vs. both.	[reply]