Changeset 31466 in osm for applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/MemoryTileCache.java

Timestamp:

2015-08-08T12:30:05+02:00 (9 years ago)

Author:

wiktorn

Message:

Performance improvements.

• MemoryTileCache now can be initialized with desired cache size
• Tile.loadPlaceholderFromCache now uses lazy evaluation and created BufferedImage only when something is found in cache. This dramatically improves MapView drawing when a lot of tiles is missing

File:

• applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/MemoryTileCache.java (modified) (2 diffs)

applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/MemoryTileCache.java

@@ -23 +23 @@
      * Default cache size
      */
-    protected int cacheSize = 200;
+    protected int cacheSize;
 
     protected final Map<String, CacheEntry> hash;
@@ -36 +36 @@
      */
     public MemoryTileCache() {
+        this(200);
+    }
+
+    /**
+     * Constructs a new {@code MemoryTileCache}.
+     * @param cacheSize size of the cache
+     */
+    public MemoryTileCache(int cacheSize) {
+        this.cacheSize = cacheSize;
         hash = new HashMap<>(cacheSize);
         lruTiles = new CacheLinkedListElement();
     }
+
 
     @Override