Arrays vs tuples / lists

[Einar Karttunen]

On 22.05 10:02, Thomas Lindgren wrote:
> On the other hand, the shared-heap implementation
> could conceivably avoid copying. I haven't checked
> whether it actually does so.

I did some quick benchmarking with the test module in
this thread. It appears that shared heap does not 
improve performance in this case. However hipe makes
the tuple case much faster.

- Einar Karttunen
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e@REDACTED:~$ erl
Erlang (BEAM) emulator version 5.3 [source] [hipe] [threads:0]

Eshell V5.3  (abort with ^G)
1> c(test).
{ok,test}
2> [test:tup(1000, small), test:tup(1000, medium), 
2>  test:ets(1000, small), test:ets(1000, medium), 
2>  test:empty(1000)]
2> .
[{871445,ok},{869860,ok},{5069710,ok},{10382329,ok},{771318,ok}]
3> halt().
e@REDACTED:~$ erl
Erlang (BEAM) emulator version 5.3 [source] [hipe] [threads:0]

Eshell V5.3  (abort with ^G)
1> c(test, [native, {hipe, [o3]}]).
{ok,test}
2> [test:tup(1000, small), test:tup(1000, medium), 
2>  test:ets(1000, small), test:ets(1000, medium), 
2>  test:empty(1000)].
[{141997,ok},{136991,ok},{3732640,ok},{8808114,ok},{78245,ok}]
3> halt().
e@REDACTED:~$ erl -shared
Erlang (BEAM) emulator version 5.3 [source] [hipe] [shared heap] [threads:0]

Eshell V5.3  (abort with ^G)
1> c(test).
{ok,test}
2> [test:tup(1000, small), test:tup(1000, medium), 
2>  test:ets(1000, small), test:ets(1000, medium), 
2>  test:empty(1000)].
[{928735,ok},{930875,ok},{6444766,ok},{12715661,ok},{782807,ok}]
3> halt().
e@REDACTED:~$ erl - shared
Erlang (BEAM) emulator version 5.3 [source] [hipe] [threads:0]

Eshell V5.3  (abort with ^G)
1> c(test, [native, {hipe, [o3]}]).
{ok,test}
2> [test:tup(1000, small), test:tup(1000, medium), 
2>  test:ets(1000, small), test:ets(1000, medium), 
2>  test:empty(1000)].
[{127755,ok},{135648,ok},{3726952,ok},{8795784,ok},{80775,ok}]
3> halt().