Running the nbody problem, Erjang vs. HiPE: 412% speedup

BEAM, R15B03

krab$ erl
Erlang R15B03 (erts-5.9.3.1) [source] [64-bit] [smp:4:4] [async-threads:0] [hipe] [kernel-poll:false]

Eshell V5.9.3.1  (abort with ^G)
1> nbody:module_info().
[{exports,[{main,1},{module_info,0},{module_info,1}]},
 {imports,[]},
 {attributes,[{vsn,[219858955424611931400228266183821808428]}]},
 {compile,[{options,[{outdir,"/Users/krab/Projects/erjang/test_server"}]},
           {version,"4.8.2"},
           {time,{2013,9,2,12,9,51}},
           {source,"/Users/krab/Projects/erjang/test_server/nbody.erl"}]}]
2> timer:tc(nbody, main, [ ["5000000"] ]).
-0.169075164
-0.169083134
{29119264,ok}
3> timer:tc(nbody, main, [ ["5000000"] ]).
-0.169075164
-0.169083134
{29420451,ok}
4> timer:tc(nbody, main, [ ["5000000"] ]).
-0.169075164
-0.169083134
{29048581,ok}

Erjang, R15B03

krab$ ../ej
** Erjang R15B03 **  [root:/usr/local/lib/erlang] [erts:5.9.3.1] [unicode]
Eshell V5.9.3.1  (abort with ^G)
1> nbody:module_info().
[{exports,[{module_info,0},{main,1},{module_info,1}]},
 {attributes,[{vsn,[219858955424611931400228266183821808428]}]},
 {compile,[{source,"/Users/krab/Projects/erjang/test_server/nbody.erl"},
           {time,{2013,9,2,12,3,23}},
           {version,"4.8.2"},
           {options,[{outdir,"/Users/krab/Projects/erjang/test_server"},
                     {hipe,[o3]},
                     native]}]}]
2> timer:tc(nbody, main, [ ["5000000"] ]).
-0.169075164
-0.169083134
{5393644,ok}
3> timer:tc(nbody, main, [ ["5000000"] ]).
-0.169075164
-0.169083134
{5326804,ok}
4> timer:tc(nbody, main, [ ["5000000"] ]).
-0.169075164
-0.169083134
{5017029,ok}

HiPE, R15B03

krab$ erl
Erlang R15B03 (erts-5.9.3.1) [source] [64-bit] [smp:4:4] [async-threads:0] [hipe] [kernel-poll:false]

Eshell V5.9.3.1  (abort with ^G)
1> nbody:module_info().
[{exports,[{main,1},{module_info,0},{module_info,1}]},
 {imports,[]},
 {attributes,[{vsn,[219858955424611931400228266183821808428]}]},
 {compile,[{options,[{outdir,"/Users/krab/Projects/erjang/test_server"},
                     {hipe,[o3]},
                     native]},
           {version,"4.8.2"},
           {time,{2013,9,2,12,3,23}},
           {source,"/Users/krab/Projects/erjang/test_server/nbody.erl"}]}]
2> timer:tc(nbody, main, [ ["5000000"] ]).
-0.169075164
-0.169083134
{21289364,ok}
3> timer:tc(nbody, main, [ ["5000000"] ]).
-0.169075164
-0.169083134
{20912921,ok}
4> timer:tc(nbody, main, [ ["5000000"] ]).
-0.169075164
-0.169083134
{20646792,ok}