[erlang-questions] efficient binary escape
Tue Apr 17 23:20:05 CEST 2012
On Tue, Apr 17, 2012 at 2:43 PM, Dmitry Kolesnikov
> Hello Erlangers!
> I'd like to get your opinion on the binary escaping techniques using erlang-only.
> Let's say that I have binary <<"ab,cdef,qwert,yuiop,....">> I wish to escape (substitute) comma by \, to get <<"ab\\,cdef\\,qwert\\,yuiop,....">>. In other words, a single byte of binary sequence has to be replaced by multiple bytes.
> and I do have about 35 - 50M tokens to procedure. The straight forward approaches like
> * binary:replace
> * sub(<<$,, Rest/binary>>, Acc) ->
> sub(Rest, <<Acc/binary, $\, $,>>)
> two slow for me!
> Do you have any suggestion? What is you experience?
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