Hi, Please can I request a review of this performance enhancement for EBCDIC (and any SingleByte, always compactable) charsets? I've explained the theory in the bug (https://bugs.openjdk.java.net/browse/JDK-8231717), but essentially it optimizes any SingleByte charset that is always compactable due to all mappings being to <=0xff and avoids unnecessary char[] to internal Latin1 byte[] arraycopy as a result. This leads to up to a 100% performance gain for decoding these charsets. I have run the complete tier1 and also the complete sun/nio/cs testcases successfully.
Webrev: http://cr.openjdk.java.net/~aleonard/8231717/webrev.00/ Thoughts and comments welcome please? Thanks Andrew Andrew Leonard Java Runtimes Development IBM Hursley IBM United Kingdom Ltd internet email: andrew_m_leon...@uk.ibm.com Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU
