Wednesday, July 22, 2009

c++ vs realtime JVM

Java might outperform c++ sometimes, but java performance is not consistent or controllable due to GC jitters -- #1 motivation behind real time jvm. IBM jvm limits GC frequency so the GC struggles to keep up with the demand, so heap gets bigger than in Sun jvm. Sun jvm requires some code change. Some people feel that to benefit from real time jvm, you must code very carefully … why not use c++. C++ is the incumbent in low-latency systems.

Market-facing gateways -- order execution and market data feed -- still use c++ primarily for another reason – gateway API is often in c++.

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http://www.linkedin.com/in/tanbin