Andres Freund <andres(at)anarazel(dot)de> writes: > I'm not sure what exactly to use as a performance benchmark > here. For now I chose > SELECT * FROM (SELECT ARRAY(SELECT generate_series(1, 10000))) d, generate_series(1, 1000) repeat(i); > that'll hit array_out, which uses iterators.
Hmm, probably those results are swamped by I/O functions though. I'd suggest trying something that exercises array_map(), which it looks like means doing an array coercion. Perhaps like so:
do $$ declare a int4; x int; begin a := array(select generate_series(1,1000)); for i in 1..100000 loop x := array_length(a::int8, 1); end loop; end$$;