To build the project:
$ make
To run test cases:
$ make check
To compare Pure Erlang version vs NIF version:
Running NIF version:
$ cd merger
$ erlc *.erl; ERL_LIBS=”..:$ERL_LIBS” erl -noshell -s perf_merger main 1000000 -s init stop
In above case, 1M entries will be inserted into NIF based priority queue.
Each entry(Key-Value pair) has 20 bytes key and probably 10-20 value by default.
Can change the defaults by tweaking perf_merger.erl to something like 4KB key
and maybe 1MB value size.
Note: perf_merger.erl tries inserting string i.e. list of bytes. Binary values being
along to NIF is way faster.
Running Pure Erlang version:
$ erlc *.erl; ERL_LIBS=”..:$ERL_LIBS” erl -noshell -s perf_couch_skew main 1000 -s init stop
Unfortunately, I wasn’t able to get rebar buildable nif ready for LessFun(couch_ejson_compare/less_fun),
so you could maybe use byte comparision in Erlang in this case.