Nikolay Fedorovskikh 6ab9c177ac Fix hash function and hash table size in Snappy ... Motivation: 1. Hash function in the Snappy encoding is wrong probably: used '+' instead of '*'. See the reference implementation [1]. 2. Size of the hash table is calculated, but not applied. Modifications: 1. Fix hash function: replace addition by multiplication. 2. Allocate hash table with calculated size. 3. Use an `Integer.numberOfLeadingZeros` trick for calculate log2. 4. Release buffers in tests. Result: 1. Better compression. In the test `encodeAndDecodeLongTextUsesCopy` now compressed size is 175 instead of 180 before this change. 2. No redundant allocations for hash table. 3. A bit faster the calc of shift (less an expensive math operations). [1] 513df5fb5a/snappy.cc (L67)		2017-08-01 07:08:54 +02:00
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main/java/io/netty/handler/codec	Fix hash function and hash table size in Snappy	2017-08-01 07:08:54 +02:00
test	Fix hash function and hash table size in Snappy	2017-08-01 07:08:54 +02:00