The changed files are these: M src/share/classes/java/util/zip/Adler32.java M src/share/classes/java/util/zip/CRC32.java M src/share/classes/sun/misc/VM.java M src/share/native/java/util/zip/CRC32.c M test/java/util/zip/TimeChecksum.java A test/java/util/zip/CRCandAdlerTest.java
This is for a performance RFE filed against "compiler", JDK-7088419: "Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32 and java.util.zip.Adler32" The nature of the changes is 1) adding fork-join parallelism for Adler32 and CRC32, 2) handling small cases in Java when that is cheaper than JNI overheads, 3) on suitable Intel platforms, using a fancy instruction to make CRC go faster. There's a companion patch for the hotspot side -- the two conspire to pass platform feature information through a property "sun.zip.clmulSupported". And to which list should I post the request for reviews? David
