Graph Perf Counter: Use GlueGen's Clock.currentNanos() to ease on performance-hit measuring performance.

This was mostly notable on a Raspberry-Pi 4 arm64, where perfromance degragated around 3x using high-freq counter.

Using our well determined Clock.currentNanos() removes this overhead,
back to 'easy measuring' and having a well defined 'currentNanos()' since module start.

TestTextRendererNEWT00 can enable Region and Font perf-counter w/ '-perf',
w/o it only uses its own counter and hence reduce the high-freq burden (64% perf win on raspi4).

+++

Below numbers show that Region.addOutlineShape() perhaps needs a little performance work
to allow long text to be processed in 'real time' on embedded platform.

Hower, usually we cache the Region for long text and can have at least one liner
to be renderer within 60fps fast, i.e. Region produced in ~26ms for a 81 char line
instead of ~130ms for 664 chars.

+++

Raspberry Pi 4b, OpenJDK17, Debian 11:

Using current medium sized text_1 w/ 664 chars, w/o '-perf'
and after having passed 40 frames, we have following durations:
- process the OutlineShape -> Region: 129ms (text)
- Render the Region: 53ms

Startup Times:
- loading GlueGen - loading test      0 [ms]
- loading GlueGen - start test    1,910 [ms]
- loading test    - start test    1,910 [ms]
- loading test    - gl            2,631 [ms]
- loading test    - graph         2,636 [ms]
- loading test    - txt           2,844 [ms]
- loading test    - draw          3,062 [ms]

Perf ..
 1 /   1: Perf Launch:   Total: graph  5, txt 207, draw 218, txt+draw 425 [ms]
 1 /   1: Perf Launch: PerLoop: graph 5,505,740, txt 207,530,736, draw 218,393,680, txt+draw 425,924,416 [ns]

 20 /  20: Perf Frame20:   Total: graph 16, txt 376, draw 281, txt+draw 657 [ms]
 20 /  20: Perf Frame20: PerLoop: graph 807,055, txt 18,820,824, draw 14,075,146, txt+draw 32,895,970 [ns]

 20 /  40: Perf Frame40:   Total: graph  3, txt 129, draw 53, txt+draw 182 [ms]
 20 /  40: Perf Frame40: PerLoop: graph 176,670, txt 6,451,330, draw 2,658,217, txt+draw 9,109,547 [ns]

+++

On a modern desktop (~2y old), GNU/Linux Debian 11, AMD GPU on Mesa3D:

Using current medium sized text_1 w/ 664 chars, w/o '-perf'
and after having passed 40 frames, we have following durations:
- process the OutlineShape -> Region: 42ms (text)
- Render the Region: 5ms

Startup Times:
- loading GlueGen - loading test      0 [ms]
- loading GlueGen - start test      310 [ms]
- loading test    - start test      309 [ms]
- loading test    - gl              459 [ms]
- loading test    - graph           460 [ms]
- loading test    - txt             490 [ms]
- loading test    - draw            506 [ms]

Perf ..
  1 /   1: Perf Launch:   Total: graph  1, txt 29, draw 15, txt+draw 45 [ms]
  1 /   1: Perf Launch: PerLoop: graph 1,191,096, txt 29,868,436, draw 15,519,445, txt+draw 45,387,881 [ns]

 20 /  20: Perf Frame20:   Total: graph 240, txt 68, draw 21, txt+draw 89 [ms]
 20 /  20: Perf Frame20: PerLoop: graph 12,045,651, txt 3,415,402, draw 1,069,348, txt+draw 4,484,750 [ns]

 20 /  40: Perf Frame40:   Total: graph 283, txt 42, draw  5, txt+draw 47 [ms]
 20 /  40: Perf Frame40: PerLoop: graph 14,152,395, txt 2,116,114, draw 265,292, txt+draw 2,381,406 [ns]

1 files changed, 77 insertions, 70 deletions

diff --git a/src/test/com/jogamp/opengl/test/junit/graph/TestTextRendererNEWT00.java b/src/test/com/jogamp/opengl/test/junit/graph/TestTextRendererNEWT00.java
index 84909298d..353b21e1f 100644
--- a/src/test/com/jogamp/opengl/test/junit/graph/TestTextRendererNEWT00.java
+++ b/src/test/com/jogamp/opengl/test/junit/graph/TestTextRendererNEWT00.java
@@ -80,14 +80,14 @@ import com.jogamp.opengl.util.PMVMatrix;
  */
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
 public class TestTextRendererNEWT00 extends UITestCase {
-    final Instant t0 = Clock.getMonotonicTime();
+    static final Instant t0i = Clock.getMonotonicTime();
+    static final long t0 = Clock.currentNanos();
     static final boolean DEBUG = false;
     static final boolean TRACE = false;
     static long duration = 100; // ms
     static boolean forceES2 = false;
     static boolean forceGL3 = false;
     static boolean mainRun = false;
-    static boolean useMSAA = true;
     static int win_width = 1280;
     static int win_height = 720;
     static int loop_count = 1;
@@ -125,8 +125,6 @@ public class TestTextRendererNEWT00 extends UITestCase {
             } else if(args[i].equals("-height")) {
                 i++;
                 win_height = atoi(args[i]);
-            } else if(args[i].equals("-noMSAA")) {
-                useMSAA = false;
             } else if(args[i].equals("-es2")) {
                 forceES2 = true;
             } else if(args[i].equals("-gl3")) {
@@ -167,17 +165,28 @@ public class TestTextRendererNEWT00 extends UITestCase {
     static class Perf {
         // all td_ values are in [ns]
         public long td_graph = 0;
-        public long td_txt1 = 0;
-        public long td_txt2 = 0;
         public long td_txt = 0;
         public long td_draw = 0;
         public long td_txt_draw = 0;
         public long count = 0;
 
+        public Perf() {
+            final Instant startupMTime = Clock.getMonotonicStartupTime();
+            final Instant currentMTime = Clock.getMonotonicTime();
+            final Instant wallTime = Clock.getWallClockTime();
+            final Duration elapsedSinceStartup = Duration.between(startupMTime, currentMTime);
+            System.err.printf("Perf: Elapsed since startup: %,d [ms], %,d [ns]%n", elapsedSinceStartup.toMillis(), elapsedSinceStartup.toNanos());
+            System.err.printf("- monotonic startup %s, %,d [ms]%n", startupMTime, startupMTime.toEpochMilli());
+            System.err.printf("- monotonic current %s, %,d [ms]%n", currentMTime, currentMTime.toEpochMilli());
+            System.err.printf("-      wall current %s%n", wallTime);
+            final long td = Clock.currentNanos();
+            System.err.printf("- currentNanos: Elapsed %,d [ns]%n", (td-t0));
+            System.err.printf("  - test-startup %,13d [ns]%n", t0);
+            System.err.printf("  - test-current %,13d [ns]%n", td);
+        }
+
         public void clear() {
             td_graph = 0;
-            td_txt1 = 0;
-            td_txt2 = 0;
             td_txt = 0;
             td_draw = 0;
             td_txt_draw = 0;
@@ -185,17 +194,18 @@ public class TestTextRendererNEWT00 extends UITestCase {
         }
 
         public void print(final PrintStream out, final long frame, final String msg) {
-            out.printf("%3d / %3d: Perf %s:   Total: graph %,2d, txt[1 %,2d, 2 %,2d, all %,2d], draw %,2d, txt+draw %,2d [ms]%n",
+            out.printf("%3d / %3d: Perf %s:   Total: graph %,2d, txt %,2d, draw %,2d, txt+draw %,2d [ms]%n",
                     count, frame, msg,
-                    TimeUnit.NANOSECONDS.toMillis(td_graph), TimeUnit.NANOSECONDS.toMillis(td_txt1),
-                    TimeUnit.NANOSECONDS.toMillis(td_txt2), TimeUnit.NANOSECONDS.toMillis(td_txt),
+                    TimeUnit.NANOSECONDS.toMillis(td_graph),
+                    TimeUnit.NANOSECONDS.toMillis(td_txt),
                     TimeUnit.NANOSECONDS.toMillis(td_draw), TimeUnit.NANOSECONDS.toMillis(td_txt_draw));
-            out.printf("%3d / %3d: Perf %s: PerLoop: graph %,4d, txt[1 %,4d, 2 %,4d, all %,4d], draw %,4d, txt+draw %,4d [ns]%n",
+            out.printf("%3d / %3d: Perf %s: PerLoop: graph %,4d, txt %,4d, draw %,4d, txt+draw %,4d [ns]%n",
                     count, frame, msg,
-                    td_graph/count, td_txt1/count, td_txt2/count, td_txt/count, td_draw/count, td_txt_draw/count );
+                    td_graph/count, td_txt/count, td_draw/count, td_txt_draw/count );
         }
     }
 
+    @SuppressWarnings("unused")
     @Test
     public void test02TextRendererVBAA04() throws InterruptedException, GLException, IOException {
         final int renderModes = Region.VBAA_RENDERING_BIT /* | Region.COLORCHANNEL_RENDERING_BIT */;
@@ -209,7 +219,8 @@ public class TestTextRendererNEWT00 extends UITestCase {
             glp = GLProfile.getGL2ES2();
         }
 
-        final Instant t1 = Clock.getMonotonicTime();
+        final Instant t1i = Clock.getMonotonicTime();
+        final long t1 = Clock.currentNanos();
 
         final GLCapabilities caps = new GLCapabilities( glp );
         caps.setAlphaBits(4);
@@ -242,25 +253,22 @@ public class TestTextRendererNEWT00 extends UITestCase {
         final int indices_per_char = 33; // 50;
         final GLRegion region;
         if( do_perf ) {
-            final int char_count = text_1.length()+text_2.length(); // 664 + 670 = 1334
+            final int char_count = text_1.length(); // 1296
             region = GLRegion.create(gl.getGLProfile(), renderModes, null, char_count*vertices_per_char, char_count*indices_per_char);
         } else {
-            // final int char_count = text_1.length()+text_2.length(); // 664 + 670 = 1334
+            // final int char_count = text_1.length(); // 1296
             region = GLRegion.create(gl.getGLProfile(), renderModes, null);
             // region.growBufferSize(char_count*vertices_per_char, char_count*indices_per_char);
         }
 
-        final Perf perf;
+        final Perf perf = new Perf();
         if( do_perf ) {
-            perf = new Perf();
             region.perfCounter().enable(true);
             font.perfCounter().enable(true);
-        } else {
-            perf = null;
         }
 
         for(int loop_i=0; loop_i < loop_count; ++loop_i) {
-            final Instant t2 = Clock.getMonotonicTime(); // all initialized but graph
+            final long t2 = Clock.currentNanos(); // all initialized but graph
             if( null != perf ) {
                 ++perf.count;
             }
@@ -284,11 +292,11 @@ public class TestTextRendererNEWT00 extends UITestCase {
             gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
             region.clear(gl);
 
-            final Instant t3 = Clock.getMonotonicTime(); // all initialized w/ graph
+            final long t3 = Clock.currentNanos(); // all initialized w/ graph
 
             final float dx = 0;
             final float dy = drawable.getSurfaceHeight() - 3 * fontSize * font.getLineHeight();
-            final Instant t4, t5;
+            final long t4;
             {
                 // all sizes in em
                 final float x_width = font.getAdvanceWidth( font.getGlyphID('X') );
@@ -297,24 +305,11 @@ public class TestTextRendererNEWT00 extends UITestCase {
                 t.setToTranslation(3*x_width, 0f);
                 final AABBox tbox_1 = font.getGlyphBounds(text_1);
                 final AABBox rbox_1 = TextRegionUtil.addStringToRegion(region, font, t, text_1, fg_color);
-                t4 = Clock.getMonotonicTime(); // text_1 added to region
+                t4 = Clock.currentNanos(); // text_1 added to region
                 if( 0 == loop_i && !do_perf ) {
                     System.err.println("Text_1: tbox "+tbox_1);
                     System.err.println("Text_1: rbox "+rbox_1);
                 }
-
-                if( true || !do_perf ) {
-                    t.setToTranslation(3*x_width, -1f*(rbox_1.getHeight()+font.getLineHeight()));
-                    final AABBox tbox_2 = font.getGlyphBounds(text_2);
-                    final AABBox rbox_2 = TextRegionUtil.addStringToRegion(region, font, t, text_2, fg_color);
-                    t5 = Clock.getMonotonicTime(); // text_2 added to region
-                    if( 0 == loop_i && !do_perf ) {
-                        System.err.println("Text_1: tbox "+tbox_2);
-                        System.err.println("Text_1: rbox "+rbox_2);
-                    }
-                } else {
-                    t5 = t4;
-                }
             }
 
             final PMVMatrix pmv = renderer.getMatrix();
@@ -323,34 +318,42 @@ public class TestTextRendererNEWT00 extends UITestCase {
             pmv.glTranslatef(dx, dy, z0);
             pmv.glScalef(fontSize, fontSize, 1f);
             region.draw(gl, renderer, sampleCountIO);
-            final Instant t6 = Clock.getMonotonicTime(); // text_1 added to region
+            final long t5 = Clock.currentNanos(); // text_1 added to region
             if( null != perf ) {
-                final long td_graph = Duration.between(t2, t3).toNanos();
-                final long td_txt1 = Duration.between(t3, t4).toNanos();
-                final long td_txt2 = Duration.between(t4, t5).toNanos();
-                final long td_txt = Duration.between(t3, t5).toNanos();
-                final long td_draw = Duration.between(t5, t6).toNanos();
-                final long td_txt_draw = Duration.between(t3, t6).toNanos();
+                final long td_graph = t3 - t2;
+                final long td_txt = t4 - t3;
+                final long td_draw = t5 - t4;
+                final long td_txt_draw = t5 - t3;
                 perf.td_graph += td_graph;
-                perf.td_txt1 += td_txt1;
-                perf.td_txt2 += td_txt2;
                 perf.td_txt += td_txt;
                 perf.td_draw += td_draw;
                 perf.td_txt_draw += td_txt_draw;
                 if( 0 == loop_i ) {
-                    final long td_launch0 = Duration.between(t0, t1).toMillis(); // raw
-                    final long td_launch1 = Duration.between(t0, t2).toMillis(); // gl
-                    final long td_launch2 = Duration.between(t0, t3).toMillis(); // w/ graph
-                    final long td_launch_txt = Duration.between(t0, t5).toMillis();
-                    final long td_launch_draw = Duration.between(t0, t6).toMillis();
-                    System.err.printf("%3d: Perf Launch: raw %,4d, gl %,4d, graph %,4d, txt %,4d, draw %,4d [ms]%n",
-                            loop_i+1, td_launch0, td_launch1, td_launch2, td_launch_txt, td_launch_draw);
+                    final Duration td_launch0a = Duration.between(Clock.getMonotonicStartupTime(), t0i); // loading Gluegen - load test
+                    final Duration td_launch0b = Duration.between(Clock.getMonotonicStartupTime(), t1i); // loading Gluegen - start test
+                    final long td_launch1 = t1 - t0; // since loading this test
+                    final long td_launch2 = t2 - t0; // gl
+                    final long td_launch3 = t3 - t0; // w/ graph
+                    final long td_launch_txt = t4 - t0;
+                    final long td_launch_draw = t5 - t0;
+                    System.err.printf("%n%n%3d: Perf Launch:%n"+
+                                      "- loading GlueGen - loading test %,6d [ms]%n"+
+                                      "- loading GlueGen - start test   %,6d [ms]%n"+
+                                      "- loading test    - start test   %,6d [ms]%n"+
+                                      "- loading test    - gl           %,6d [ms]%n"+
+                                      "- loading test    - graph        %,6d [ms]%n"+
+                                      "- loading test    - txt          %,6d [ms]%n"+
+                                      "- loading test    - draw         %,6d [ms]%n",
+                            loop_i+1,
+                            td_launch0a.toMillis(), td_launch0b.toMillis(),
+                            TimeUnit.NANOSECONDS.toMillis(td_launch1), TimeUnit.NANOSECONDS.toMillis(td_launch2),
+                            TimeUnit.NANOSECONDS.toMillis(td_launch3), TimeUnit.NANOSECONDS.toMillis(td_launch_txt),
+                            TimeUnit.NANOSECONDS.toMillis(td_launch_draw));
                     perf.print(System.err, loop_i+1, "Launch");
-                } else {
-                    System.err.printf("%3d: Perf: graph %2d, txt[1 %2d, 2 %2d, all %2d], draw %2d, txt+draw %2d [ms]%n",
+                } else if( false && do_perf ) {
+                    System.err.printf("%3d: Perf: graph %2d, txt %2d, draw %2d, txt+draw %2d [ms]%n",
                             loop_i+1,
-                            TimeUnit.NANOSECONDS.toMillis(td_graph), TimeUnit.NANOSECONDS.toMillis(td_txt1),
-                            TimeUnit.NANOSECONDS.toMillis(td_txt2), TimeUnit.NANOSECONDS.toMillis(td_txt),
+                            TimeUnit.NANOSECONDS.toMillis(td_graph),TimeUnit.NANOSECONDS.toMillis(td_txt),
                             TimeUnit.NANOSECONDS.toMillis(td_draw), TimeUnit.NANOSECONDS.toMillis(td_txt_draw) );
                 }
             }
@@ -360,29 +363,33 @@ public class TestTextRendererNEWT00 extends UITestCase {
                 printScreen(screenshot, renderModes, drawable, gl, false, sampleCount);
             }
             drawable.swapBuffers();
-            if( null != perf && loop_count/3-1 == loop_i ) {
+            if( null != perf && loop_count/2-1 == loop_i ) {
                 // print + reset counter @ 1/3 loops
-                region.perfCounter().print(System.err);
-                font.perfCounter().print(System.err);
-                perf.print(System.err, loop_i+1, "Frame"+(loop_count/3));
+                if( do_perf ) {
+                    region.perfCounter().print(System.err);
+                    font.perfCounter().print(System.err);
+                }
+                perf.print(System.err, loop_i+1, "Frame"+(loop_i+1));
                 perf.clear();
-                region.perfCounter().clear();
-                font.perfCounter().clear();
+                if( do_perf ) {
+                    region.perfCounter().clear();
+                    font.perfCounter().clear();
+                }
             }
             if( 0 == loop_i || loop_count - 1 == loop_i) {
                 // print counter @ start and end
                 System.err.println("GLRegion: for "+gl.getGLProfile()+" using int32_t indiced: "+region.usesI32Idx());
                 System.err.println("GLRegion: "+region);
-                System.err.println("Text length: text_1 "+text_1.length()+", text_2 "+text_2.length()+", total "+(text_1.length()+text_2.length()));
+                System.err.println("Text length: "+text_1.length());
                 region.printBufferStats(System.err);
-                region.perfCounter().print(System.err);
-                font.perfCounter().print(System.err);
+                if( do_perf ) {
+                    region.perfCounter().print(System.err);
+                    font.perfCounter().print(System.err);
+                }
+                perf.print(System.err, loop_i+1, "Frame"+(loop_i+1));
             }
             // region.destroy(gl);
         }
-        if( null != perf ) {
-            perf.print(System.err, loop_count, "FrameXX");
-        }
 
         region.destroy(gl);
 
@@ -426,7 +433,7 @@ public class TestTextRendererNEWT00 extends UITestCase {
         //       ^
         //       |
 
-    public static final String text_1s = "Hello World. Gustav got news.";
+    public static final String text_1s = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec nec sapien tellus.";
     public static final String text_1 =
         "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec nec sapien tellus. \n"+
         "Ut purus odio, rhoncus sit amet commodo eget, ullamcorper vel urna. Mauris ultricies \n"+