slembcke

    const NSUInteger testCount = 1000000;
    {
	GLKMatrix4 m = M; // Initialized from a global to prevent constant folding when inlining.
				
        CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
        for (NSUInteger i = 0; i < testCount; i++) {
		m = GLKMatrix4Multiply(m, m);
        }
        NSLog(@"time GLKit: %f", CFAbsoluteTimeGetCurrent() - t);
	M = m; // Need to save the value of m to avoid it being optimized away

slembcke

// This is a little annoying:
cpVect *hullVerts = (cpVect *)calloc(NUM_VERTS, sizeof(cpVect));
int hullCount = cpConvexHull(NUM_VERTS, verts, hullVerts, NULL, 0.0);

cpFloat mass = 1.0;
cpFloat moment = cpMomentForPoly(mass, hullCount, hullVerts, cpvzero);

body = cpSpaceAddBody(space, cpBodyNew(mass, moment));

shape = cpSpaceAddShape(space, cpPolyShapeNew(body, hullCount, hullVerts, cpvzero));