Re: JNI wrapper for C XML-RPC libraries - performance questions

[Jochen Wiedmann]

Peter Butler wrote:
Excellent idea.  I've profiled the JNI and Java versions separately
using java -Xhprof, and the results are here:
The JNI profiles are useless. It seems, most of the time is spent within JNI 
calls, where no valuable information is provided. Bottom of jni.cpu.txt:

    CPU TIME (ms) BEGIN (total = 19)
    rank   self   accum  count  trace  method
    1      100%   100%   100    3      pricom.jni.test.JNITest.execute
The Java profiles show nothin, IMO. In particular no signs for excessive 
garbage collection. (Compare the counters of "live" and "alloc'ed" on the 
bottom of the file.

I suggest you try other tools, which are more helping. For example, I have 
had good experiences with the EclipseColorer (see 
http://eclipsecolorer.sourceforge.net) As the name suggests, it's a plugin 
for Eclipse and relatively self explaining.

Sorry,
Jochen