Summary

At some point java.awt.Color.createContext() was marked as synchronized to support caching of a ColorPaintContext instance. Although the caching logic was removed, the synchronized modifier remained in place.

Problem

The method is still marked as synchronized despite no longer accessing shared mutable state. This introduces unnecessary synchronization overhead which can degrade performance in multi-threaded rendering scenarios.

Solution

Drop the "synchronized" keyword from the java.awt.Color#createContext() method to reduce the overhead of the method in multi-core environments.

Specification

java/awt/Color.java

-    public synchronized PaintContext createContext(ColorModel cm, Rectangle r,
-                                                   Rectangle2D r2d,
-                                                   AffineTransform xform,
-                                                   RenderingHints hints) {
+    public PaintContext createContext(ColorModel cm, Rectangle r,
+                                      Rectangle2D r2d, AffineTransform xform,
+                                      RenderingHints hints) {