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From: "Barry A. Warsaw" <bwarsaw@CNRI.Reston.Va.US>
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One other thing about changing following-char to char-after, etc.  I
think Hrvoje said that there are no bytecodes for char-after and
char-before.  Am I going to see performance hits after I make this
change?  Might it be wise to add bytecodes for these functions (making 
sure RMS does the same and chooses the same code? :-)

Hmm, I just looked at bytecomp.el and if I'm reading it right, there
are bytecodes for char-after but not for char-before, so perhaps only
the latter needs to be added?

-Barry

