[erlang-questions] Transferring list from java through JInterface

Martin Dimitrov <>
Sat Nov 26 07:56:56 CET 2011


Hello,

I have a huge list, about 500K strings each containing 3 chars. I
noticed it is very slow to construct an OtpErlangList out of the Java
List<String> and to send it to the Erlang process. When constructing an
OptErlangBinary out of the Java List<String>, it takes no time to
transfer. The problem is that the list gets concatenated. Is there a way
to avoid it?

I also noticed that transferring a huge string (2.5MB) as
OtpErlangString is very slow while transferring it as OptErlangBinary is
very fast. Can you explain to me why is it so? Maybe I don't (fully)
understand the binary type.

Thank you,

Martin



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