[erlang-questions] Erlang shell lag when using open_port/2

[OvermindDL1]

For note, the 'swallowed' keys pressed in the Erlang shell seem to get
passed to stdin of the launched child process, and not all input is
swallowed, it seems quite random whether it gets passed to the Erlang shell
or to the launched process.
On Aug 11, 2013 7:34 AM, "Serge Aleynikov" <serge@REDACTED> wrote:

> While looking at the issue described here [1] I drilled the issue down
> to the following problem with erlang:open_port/2 (note: get
> minecraft_server.1.6.2.jar here [2]):
>
> When executing:
>
> f(P), P = erlang:open_port({spawn, "java -Xms1G -Xmx1G -jar
> minecraft_server.1.6.2.jar nogui"}, [binary, exit_status, nouse_stdio]).
>
> The Erlang shell has a very noticeable lag between key presses, and
> seems to "swallow" some typed keys.
>
> On the other hand, when running the same command without 'nouse_stdio'
> option, the Erlang shell behaves as expected.
>
> Is this a bug?  If not, how can I take advantage of nouse_stdio and not
> have that impact on the Erlang shell?
>
> Serge
>
> [1] https://github.com/saleyn/erlexec/issues/17
> [2] wget
> '
> https://s3.amazonaws.com/Minecraft.Download/versions/1.6.2/minecraft_server.1.6.2.jar
> '
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