JDK-8106145 : Hand tune the Java and SSE based Shadow filter implementations
  • Type: Bug
  • Component: javafx
  • Sub-Component: graphics
  • Affected Version: fx1.0
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2009-01-11
  • Updated: 2015-06-16
  • Resolved: 2009-01-14
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Other
fx1.1Fixed
Related Reports
Relates :  
JDK-8098164 - Improve performance of Gaussian-based effects
Description
The Shadow filter is used in many common situations, including a component of the DropShadow and InnerShadow effects and also the PhongLighting effect.  Right now any device without hardware (GPU) acceleration will use either a native compiled (SSE enabled) function or a Java method that was written by the automated JSL compiler.  The code is surprisingly fast for code that was derived from a Shader source language, but it isn't as fast as it could be by rewriting the inner loops by hand.

A quick hand-tuning of the inner loops of the Java and SSE backends for Shadow show approximately a 6x improvement in Shadow and DropShadow.  Here is a quick table of the results:

                                      radius 10        radius 63
JSL Java                           89                   955
JSL SSE                           56                   650

Hand tuned Java            21                  150
Hand tuned SSE            12.5                 83

D3D                                    5                     13