On Thu, Sep 18, 2014 at 12:36 PM, Jim Meyering <[email protected]> wrote:
> It looks like most of the difference is the result of
> commit cd36abd46c5e0768606979ea75a51732062f5624,
> "grep: treat a file as binary if its prefix contains encoding errors",
Hi Paul,
I found that the above commit induces a large performance hit.
Over 50x in this example:
seq 99999999 > k
LC_ALL=C diff -u \
<(PATH=.bin/2.20-31:$PATH env time -f %e grep asdf k 2>&1) \
<(PATH=.bin/2.20-32:$PATH env time -f %e grep asdf k 2>&1)
...
-0.21
+11.47
The problem is that the new function is processing all of
the input, not just a prefix.
