more performance tuning

brouter-expressions/src/main/java/btools/expressions/CacheNode.java

@@ -0,0 +1,33 @@
+package btools.expressions;
+
+import java.util.Arrays;
+
+import btools.util.LruMapNode;
+
+public final class CacheNode extends LruMapNode
+{
+  int crc;
+  byte[] ab;
+  float[] vars;
+
+  @Override
+  public int hashCode()
+  {
+    return crc;
+  }
+
+  @Override
+  public boolean equals( Object o )
+  {
+    CacheNode n = (CacheNode) o;
+    if ( crc != n.crc )
+    {
+      return false;
+    }
+    if ( ab == null )
+    {
+      return true; // hack: null = crc match only
+    }
+    return Arrays.equals( ab, n.ab );
+  }
+}