diff --git a/java/libraries/opengl/examples/Performance/CubicGridImmediate/CubicGridImmediate.pde b/java/libraries/opengl/examples/Performance/CubicGridImmediate/CubicGridImmediate.pde
new file mode 100644
index 000000000..f9cb7f987
--- /dev/null
+++ b/java/libraries/opengl/examples/Performance/CubicGridImmediate/CubicGridImmediate.pde
@@ -0,0 +1,59 @@
+/**
+ * Cubic Grid 
+ * by Ira Greenberg. 
+ * 
+ * 3D translucent colored grid uses nested pushMatrix()
+ * and popMatrix() functions. 
+ */
+
+float boxSize = 20;
+float margin = boxSize*2;
+float depth = 400;
+color boxFill;
+
+int fcount, lastm;
+float frate;
+int fint = 3;
+
+void setup() {
+  size(640, 360, P3D);
+  frameRate(120);
+  noStroke();
+}
+
+void draw() {
+  background(255);
+  
+  hint(DISABLE_DEPTH_TEST);
+  
+  // Center and spin grid
+  translate(width/2, height/2, -depth);
+  rotateY(frameCount * 0.01);
+  rotateX(frameCount * 0.01);
+
+  // Build grid using multiple translations 
+  for (float i =- depth/2+margin; i <= depth/2-margin; i += boxSize){
+    for (float j =- height+margin; j <= height-margin; j += boxSize){
+      for (float k =- width+margin; k <= width-margin; k += boxSize){
+        // Base fill color on counter values, abs function 
+        // ensures values stay within legal range
+        boxFill = color(abs(i), abs(j), abs(k), 50);
+        pushMatrix();
+        translate(k, j, i);
+        fill(boxFill);
+        box(boxSize, boxSize, boxSize);
+        popMatrix();
+      }
+    }
+  }
+  
+  fcount += 1;
+  int m = millis();
+  if (m - lastm > 1000 * fint) {
+    frate = float(fcount) / fint;
+    fcount = 0;
+    lastm = m;
+    println("fps: " + frate); 
+  }
+}
+
diff --git a/java/libraries/opengl/examples/Performance/CubicGridRetained/CubicGridRetained.pde b/java/libraries/opengl/examples/Performance/CubicGridRetained/CubicGridRetained.pde
new file mode 100644
index 000000000..8dd1d8f7e
--- /dev/null
+++ b/java/libraries/opengl/examples/Performance/CubicGridRetained/CubicGridRetained.pde
@@ -0,0 +1,108 @@
+float boxSize = 20;
+float margin = boxSize*2;
+float depth = 400;
+color boxFill;
+
+PShape grid;
+
+int fcount, lastm;
+float frate;
+int fint = 3;
+
+void setup() {
+  size(640, 360, P3D);
+  frameRate(120);
+  noStroke();
+  
+  grid = createShape(PShape.GROUP);
+    
+  // Build grid using multiple translations 
+  for (float i =- depth/2+margin; i <= depth/2-margin; i += boxSize){
+    for (float j =- height+margin; j <= height-margin; j += boxSize){
+      for (float k =- width+margin; k <= width-margin; k += boxSize){
+        // Base fill color on counter values, abs function 
+        // ensures values stay within legal range
+        boxFill = color(abs(i), abs(j), abs(k), 50);
+        
+        PShape cube = createShape(QUADS);
+        cube.noStroke();
+        cube.fill(boxFill);
+        
+        float w = boxSize;
+        float h = boxSize;
+        float d = boxSize; 
+        float shiftX = k; 
+        float shiftY = j; 
+        float shiftZ = i;
+        
+        // Front face
+        cube.normal(0, 0, 1);
+        cube.vertex(-w/2 + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+        cube.vertex(+w/2 + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+        cube.vertex(+w/2 + shiftX, +h/2 + shiftY, -d/2 + shiftZ); 
+        cube.vertex(-w/2 + shiftX, +h/2 + shiftY, -d/2 + shiftZ); 
+
+        // Back face
+        cube.normal(0, 0, -1);
+        cube.vertex(-w/2 + shiftX, -h/2 + shiftY, +d/2 + shiftZ); 
+        cube.vertex(+w/2 + shiftX, -h/2 + shiftY, +d/2 + shiftZ); 
+        cube.vertex(+w/2 + shiftX, +h/2 + shiftY, +d/2 + shiftZ); 
+        cube.vertex(-w/2 + shiftX, +h/2 + shiftY, +d/2 + shiftZ);
+
+        // Left face
+        cube.normal(1, 0, 0);
+        cube.vertex(-w/2 + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+        cube.vertex(-w/2 + shiftX, -h/2 + shiftY, +d/2 + shiftZ); 
+        cube.vertex(-w/2 + shiftX, +h/2 + shiftY, +d/2 + shiftZ); 
+        cube.vertex(-w/2 + shiftX, +h/2 + shiftY, -d/2 + shiftZ); 
+
+        // Right face
+        cube.normal(-1, 0, 0);
+        cube.vertex(+w/2 + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+        cube.vertex(+w/2 + shiftX, -h/2 + shiftY, +d/2 + shiftZ); 
+        cube.vertex(+w/2 + shiftX, +h/2 + shiftY, +d/2 + shiftZ); 
+        cube.vertex(+w/2 + shiftX, +h/2 + shiftY, -d/2 + shiftZ); 
+
+        // Top face
+        cube.normal(0, 1, 0);
+        cube.vertex(-w/2 + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+        cube.vertex(+w/2 + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+        cube.vertex(+w/2 + shiftX, -h/2 + shiftY, +d/2 + shiftZ); 
+        cube.vertex(-w/2 + shiftX, -h/2 + shiftY, +d/2 + shiftZ); 
+
+        // Bottom face
+        cube.normal(0, -1, 0);
+        cube.vertex(-w/2 + shiftX, +h/2 + shiftY, -d/2 + shiftZ); 
+        cube.vertex(+w/2 + shiftX, +h/2 + shiftY, -d/2 + shiftZ); 
+        cube.vertex(+w/2 + shiftX, +h/2 + shiftY, +d/2 + shiftZ); 
+        cube.vertex(-w/2 + shiftX, +h/2 + shiftY, +d/2 + shiftZ);  
+            
+        cube.end();
+        grid.addChild(cube);
+      }
+    }
+  }
+}
+
+void draw() {
+  background(255);
+  
+  hint(DISABLE_DEPTH_TEST);
+  
+  // Center and spin grid
+  translate(width/2, height/2, -depth);
+  rotateY(frameCount * 0.01);
+  rotateX(frameCount * 0.01);
+
+  shape(grid);
+  
+  fcount += 1;
+  int m = millis();
+  if (m - lastm > 1000 * fint) {
+    frate = float(fcount) / fint;
+    fcount = 0;
+    lastm = m;
+    println("fps: " + frate); 
+  } 
+}
+