JDK-6328154 : performance degration in latin-1 text rendering with TextLayout
  • Type: Bug
  • Component: client-libs
  • Sub-Component: 2d
  • Affected Version: 6
  • Priority: P2
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2005-09-23
  • Updated: 2008-02-06
  • Resolved: 2005-10-10
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JDK 6
6 b56Fixed
Related Reports
Relates :  
JDK-6962082 - closed/java/awt/font/TextLayout/CombiningPerf.java test fails on 7b97 on oel5.5-x64
Description
Rendering Latin-1 text is several times slower.
Comments
EVALUATION Performance degration is due to setup and scan in native layout for canonical composition/decomposition of latin-1 text. The solution is to avoid the scan when no combining marks are present in the text. This allows canonical processing to operate in most cases where it could make a difference, while avoiding it for the common case.
23-09-2005