update the bench.sh examples with payloads and clojure expression

so far it looks ok, the time difference between having a
regular term query and clojure expression query is
only *3 (term takes N, clojure expr takes N*3)

here are the results from my laptop:
N/     clojure   term
12k      10       2
100k     26       8
1m       130      35
5m       630      140

this is just running the query multiple times
those are not real benchmark numbers, but just
to see how it looks from distance.