NEWT: Add time costs in DEBUG mode. NEWT/XRandR: Reuse XRRScreenConfiguration to reduce perf hit on Linux ARM Omap4.

On Linux ARM Omap4, we experience a performance hit when using XRandR:
  1st call of XRRSizes: ~ 1668 ms
  Each call of XRRGetScreenInfo: ~ 1109 ms

Even though XRRGetScreenInfo is cached in NEWT's X11Screen initialization,
overall init time is ~2s, far too expensive.

1 files changed, 6 insertions, 8 deletions

diff --git a/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java b/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
index dc2db7f74..c0d79a5d4 100644
--- a/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
+++ b/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
@@ -394,11 +394,12 @@ public class GLWindow implements GLAutoDrawable, Window, NEWTEventConsumer, FPSC
         }
 
         public synchronized void setVisibleActionPost(boolean visible, boolean nativeWindowCreated) {
+            long t0;
             if(Window.DEBUG_IMPLEMENTATION) {
-                String msg = "GLWindow.setVisibleActionPost("+visible+", "+nativeWindowCreated+") "+Thread.currentThread()+", start";
-                System.err.println(msg);
-                // Exception e1 = new Exception(msg);
-                // e1.printStackTrace();
+                t0 = System.nanoTime();
+                System.err.println("GLWindow.setVisibleActionPost("+visible+", "+nativeWindowCreated+") "+Thread.currentThread()+", start");
+            } else {
+                t0 = 0;
             }
 
             /* if (nativeWindowCreated && null != context) {
@@ -423,10 +424,7 @@ public class GLWindow implements GLAutoDrawable, Window, NEWTEventConsumer, FPSC
                 context.setContextCreationFlags(additionalCtxCreationFlags);                
             }
             if(Window.DEBUG_IMPLEMENTATION) {
-                String msg = "GLWindow.setVisibleActionPost("+visible+", "+nativeWindowCreated+") "+Thread.currentThread()+", fin";
-                System.err.println(msg);
-                //Exception e1 = new Exception(msg);
-                //e1.printStackTrace();
+                System.err.println("GLWindow.setVisibleActionPost("+visible+", "+nativeWindowCreated+") "+Thread.currentThread()+", fin: dt "+ (System.nanoTime()-t0)/1e6 +"ms");
             }
         }