Aleksey Yeschenko 09158a6420 Fix LZ4 encoder/decoder performance with (default) xxHash32 (#9249) ... Motivation: Lz4FrameEncoder and Lz4FrameDecoder in their default configuration use an extremely inefficient way to checksum direct byte buffers. In particular, for every byte checksummed, a single-element byte array is being allocated and a JNI cal is made, which in some internal testing makes a 25x difference in total throughput and allocates *a lot* of garbage. Modifications: Lz4XXHash32, an implementation of ByteBufChecksum specifically for use by Lz4FrameEncoder and Lz4FrameDecoder, is introduced. It utilises xxHash32 block API which provides a hash() method that accepts a ByteBuffer as an argument. Lz4FrameEncoder and Lz4FrameDecoder are modified to use this implementation by default. Result: Lz4FrameEncoder and Lz4FrameDecoder perform well again when operating on direct byte buffers with default checksum configuration; a public implementation is provided for those who need to override the seed.		2019-06-18 09:33:25 +02:00
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src	Fix LZ4 encoder/decoder performance with (default) xxHash32 (#9249)	2019-06-18 09:33:25 +02:00
pom.xml	Correcting Maven Dependencies (#8622)	2018-12-06 09:02:00 +01:00