monnti

Hey!

I am developing a real time game. Therefore, I also want to provide a Bluetooth multiplayer mode. Now there is my problem… When I commit the information to the other device I need to parse it. I send ~ 30 messages a second. Everything is working fine except the garbage collector. When I run the game it lags every second cause of the running garbage collector.

I have tried to send an xml and parse it by a SAX parser…. But there the GC starts…
I also tried to send my own primitive data… the result is the same… when I split the strings the GC gets started… Also when I try to convert my strings to other values (int/float …) the GC is started.

I really have no clue how to avoid this!!

It would be great if someone can give me a hint how to send and receive real time information without starting the garbage collector!!!

jonbonazza

Unfortunately, there really isn't a way around this... in Java at least... Your best bet would be to use the JNI, find a C/C++ BT library and write it in native code.

monnti

I have looked inside of the AndEngine Multiplayer Extension. They use a DataOutputStream/DataInputStream. But I’m not sure if this will avoid the GC <.<

But I’m a bit confused… would they use a method that isn’t able to provide real time game preformance? O.o


@jonbonazza
Do you have a name of any good native BT library?

alostpacket

How large are your messages? Can you trim them down and/or can you keep to only sending when needed, and predicting movement/behavoir when waiting for a message?

If you've ever noticed this is what online games have done for years due to latency etc. When you see a character run sometime they will "rubber band" when stopping or changing direction. That's because the actual position data just caught up with the predicted position.

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