On Mon, Oct 10, 2011 at 10:28 PM, Rob Lally <[email protected]> wrote:
> Would supporting other data structures make it slower when using vectors,
> or only when using non-vector seq's?
>
If we use :seq pattern matching, it will use first/rest. This can be very
expensive. Vectors will take a performance hit.
:vector matching uses subvec, which explains its advantages (speed) and
disadvantages (only supports vectors).
What I'm proposing is defaulting to :seq matching. It's very easy to "switch
on" :vector matching.
Something like
(match [v]
[[x & xs]] 1) <- :seq
(match [v]
[([x & xs] :vector)] 1) <- vector
Ambrose
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