Eli Barzilay wrote at 04/22/2011 05:09 PM:
One way to make it fast is to have it bound to a macro so (member f l eq?) expands to a `memq', and when used as a function have it dispatch to `memq' if given `eq?'.
If someone really wanted to do that optimization in a macro (at first glance, seems a little unSchemely to me, and I think a compiler or JIT should be able do that optimization, anyway), I'd hope they'd pick a new name for the macro. "member", "assoc", and friends of course have been procedures forever.
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