[forgotpw1123]

This just isn't true. There's many Java ports of C/C++ applications and benchmarks are usually within 30%.

[coldtea]

For the easy tasks. Try a CPU heavy C/C++ app -- like an audio/video editor, number crunching of any kind, etc.

[forgotpw1123]

Like I said, the major exception is SIMD instructions. AV and heavy math are a tiny fraction of applications. For these you can use JNI.

There is precedent for this in Netty where they use a native poll mode driver and everything else Java, and it performs about as fast as pure C code on Techempower benchmarks