Re: pcase.el

[Stefan Monnier]

SM> The future has passed.  It's called `pcase'.
[...]
> There's also an erlang-style matcher for elisp here:
> http://code.google.com/p/distel/.

Not to belittle that code, but its internal working is very different:
it does not preprocess that `case' into an efficient decision tree, but
instead naively tries each pattern in turn, in many cases performing the
same tests over and over again (even interpreting patterns at run-time
rather than precompiling them).  So pcase should show *much*
higher performance (100% untested claim).


        Stefan