Hi,
> > The problem is that the program is spending almost all of the time
> > generating stack traces, millions and millions of them.
>
> And one reason for that is pointless class lookups in
> the GTK peer code.
>
> Look at this:
>
> Java_gnu_java_awt_peer_gtk_FreetypeGlyphVector_getKerning
> (JNIEnv *env, jobject obj __attribute__((unused)), jint rightGlyph, jint
> leftGlyph, jlong fnt)
> {
> ...
>
> cls = (*env)->FindClass (env, "java/awt/geom/Point2D$Double");
> method = (*env)->GetMethodID (env, cls, "<init>", "(DD)V");
> return (*env)->NewObjectA(env, cls, method, values);
> }
>
> Now, this method only returns a pair of points, and it would have been
> trivial to pass a 2-element array into it, fill, with x and y, and
> return the same array. But no, we do a class lookup on
> java/awt/geom/Point2D$Double and call its constructor with two
> double values.
Or we could cache the MIDs and FIDs, like is recommended in all good JNI
books.
/Roman
--
Dipl.-Inform. (FH) Roman Kennke, Software Engineer, http://kennke.org
aicas Allerton Interworks Computer Automated Systems GmbH
Haid-und-Neu-Straße 18 * D-76131 Karlsruhe * Germany
http://www.aicas.com * Tel: +49-721-663 968-48
USt-Id: DE216375633, Handelsregister HRB 109481, AG Karlsruhe
Geschäftsführer: Dr. James J. Hunt
