BEAM options of non-smp and no async thread

[shino]

No async thread flag reduces execution time considerably and non-smp flag does a little more.

Bellow is a little measurament on my laptop.

Develop (commit c92c8325aeaea6b6ba7516bbd434f8e408f87d60)

% for i in {1..5}; do time ./cuttlefish-orig -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1; done
./cuttlefish-orig -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  1.35s user 1.23s system 118% cpu 2.175 total
./cuttlefish-orig -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  1.24s user 1.26s system 120% cpu 2.084 total
./cuttlefish-orig -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  1.30s user 1.27s system 119% cpu 2.149 total
./cuttlefish-orig -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  1.34s user 1.36s system 119% cpu 2.265 total
./cuttlefish-orig -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  1.40s user 1.42s system 121% cpu 2.319 total

-smp disable +A 0

% for i in {1..5}; do time ./cuttlefish-non-smp-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1; done
./cuttlefish-non-smp-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.42s user 0.07s system 99% cpu 0.493 total
./cuttlefish-non-smp-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.41s user 0.08s system 99% cpu 0.490 total
./cuttlefish-non-smp-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.40s user 0.09s system 99% cpu 0.498 total
./cuttlefish-non-smp-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.45s user 0.07s system 99% cpu 0.525 total
./cuttlefish-non-smp-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.42s user 0.08s system 99% cpu 0.498 total

+A 0

% for i in {1..5}; do time ./cuttlefish-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1; done
./cuttlefish-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.49s user 0.11s system 99% cpu 0.600 total
./cuttlefish-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.53s user 0.04s system 99% cpu 0.570 total
./cuttlefish-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.46s user 0.10s system 99% cpu 0.566 total
./cuttlefish-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.48s user 0.09s system 99% cpu 0.572 total
./cuttlefish-A0 -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.47s user 0.09s system 99% cpu 0.567 total

-smp disable

% for i in {1..5}; do time ./cuttlefish-non-smp -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1; done
./cuttlefish-non-smp -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.82s user 0.75s system 90% cpu 1.745 total
./cuttlefish-non-smp -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.54s user 0.16s system 99% cpu 0.708 total
./cuttlefish-non-smp -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.50s user 0.23s system 99% cpu 0.724 total
./cuttlefish-non-smp -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.54s user 0.15s system 99% cpu 0.694 total
./cuttlefish-non-smp -d tmp -s ../riak-2.0/dev/dev1/lib/ > /dev/null 2>&1  0.53s user 0.18s system 99% cpu 0.719 total

[seancribbs]

:+1: 1ef4494

This seems like a good change to make and low impact. Well done, @shino

[seancribbs]

@borshop merge