Re: JNI without Jni_Lookup() ?

[Bryce McKinlay <mckinlay at redhat dot com>]

Bryce McKinlay wrote:

> By my (casual) measurements, our JNI is on the order of 10X slower 
> than the JRE for Java->C calls. There's a test case in bugzilla:
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12957
>
> But you're right, maybe we should oprofile it to be sure.


Hans pointed me at qprof:  http://www.hpl.hp.com/research/linux/qprof - 
Nice simple profiler thats a lot quicker to setup and use than oprofile. 
I've updated the bug report with the profiler output. It shows that 
about 90% of the test case's runtime is spent in _Jv_GetJNIEnvNewFrame 
and Malloc/Free - definately a case for optimization, I think.

Regards

Bryce.