The files to reproduce the test can be obtained as:

svn co -r 3169 https://bluemarine.dev.java.net/svn/bluemarine/trunk/src/blueMarine-core/Core/Thumbnail/src/it/tidalwave/bluemarine/thumbnail/
impl/ThumbnailImage.java https://bluemarine.dev.java.net/svn/bluemarine/trunk/src/blueMarine-core/Core/Thumbnail/test/unit/src/it/tidalwave/
bluemarine/thumbnail/impl

Basically, there are tests that invoke this piece of code:

    private long runDecompress (ThumbnailImage thImage, final ImageReader reader) 
      throws IOException
      {
        final long time = System.currentTimeMillis();
        
        for (int i = 0; i < REPEAT_COUNT; i++)
          {
            if (reader != null)
              {
                thImage.decompressImage(reader);  
              }
            else
              {
                thImage.decompressImage();  
              }
          }
        
        return (System.currentTimeMillis() - time) / REPEAT_COUNT;
      }

REPEAT_COUNT = 100, so the invocation count for decompressImage() must be 100. 

A first test is invoked in the current thread, and the profiler reports correctly 100 invocations; a second test creates two threads each one invoking the code 
above, but in this case the invocation count for decompressImage() is 70. I don't know whether the Time reported is correct.

[Mistral:~] fritz% uname -a
Darwin Mistral.local 8.10.1 Darwin Kernel Version 8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386 i386 i386
[Mistral:~] fritz% java -version
java version "1.5.0_07"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_07-164)
Java HotSpot(TM) Client VM (build 1.5.0_07-87, mixed mode, sharing)