[mercury-users] Disjunctions vs. multiple head clauses

[Zoltan Somogyi]

On 07-Apr-2004, Peter Hawkins <peter at hawkins.emu.id.au> wrote:
> Is there any difference in efficiency between the two predicates bar1
> and bar2 in the following?

No. One of the first things the compiler does is replace multiple clauses
with an explicit disjunction. After this step, there is no difference
between bar1 and bar2. The compiler will be able to do indexing on the
resulting code regardless of its original form.

Zoltan.
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