altosuilib: Rate limit map loading pacifier updates

Just updating the pacifier was consuming a huge amount of CPU. Update
no more than once every 100ms.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/altosuilib/AltosUIMapPreloadNew.java b/altosuilib/AltosUIMapPreloadNew.java
index cce07ab4..d6c257e0 100644
--- a/altosuilib/AltosUIMapPreloadNew.java
+++ b/altosuilib/AltosUIMapPreloadNew.java
@@ -153,8 +153,12 @@ public class AltosUIMapPreloadNew extends AltosUIFrame implements ActionListener
 
 	double	latitude, longitude;
 
+	long	loader_notify_time;
+
 	/* AltosMapLoaderListener interfaces */
 	public void loader_start(final int max) {
+		loader_notify_time = System.currentTimeMillis();
+
 		SwingUtilities.invokeLater(new Runnable() {
 				public void run() {
 					pbar.setMaximum(max);
@@ -167,6 +171,13 @@ public class AltosUIMapPreloadNew extends AltosUIFrame implements ActionListener
 	}
 
 	public void loader_notify(final int cur, final int max, final String name) {
+		long	now = System.currentTimeMillis();
+
+		if (now - loader_notify_time < 100)
+			return;
+
+		loader_notify_time = now;
+
 		SwingUtilities.invokeLater(new Runnable() {
 				public void run() {
 					pbar.setValue(cur);