[erlang-questions] Optimization for the ++ operator
Fri Jun 1 12:07:33 CEST 2012
1 jun 2012 kl. 10:46 skrev "José Valim" <>:
The '++' operator does not verify that the second argument is a list.
> Therefore, the compiler will rewrite the first expression to simply:
Yes, thanks. For some weird reason I thought Erlang restricted the right
side to be a list in such cases.
> Have you made sure that you run each test in a newly spawned process?
Do you run the test for long enough time?
Running in a newly spawned process did the trick, the results are now
I was already running it 1000 times, here is the code (without using spawn):
I assume having a "clean" heap (reducing the chance of garbage collection)
is the reason why it is a good idea to run benchmarks in a newly spawned
If you want to vary one parameter in a test, make sure all other parameters
stays the same otherwise you have no idea what you are measuring!
Code loading, heaps, position of mars .. Everything has to be taken into
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