manual coding comparison in memory add benchmark

[pascaldekloe]

The Java compiler seems confused by everyday codecs. 😄

Benchmark                                  Mode  Cnt   Score   Error   Units
AddBenchmark.littleEndian                 thrpt        0,320          ops/us
AddBenchmark.scalarArray                  thrpt        7,126          ops/us
AddBenchmark.scalarArrayHandle            thrpt        7,391          ops/us
AddBenchmark.scalarArrayHandle_float      thrpt       14,243          ops/us
AddBenchmark.scalarArray_float            thrpt       14,493          ops/us
AddBenchmark.scalarSegment                thrpt        5,108          ops/us
AddBenchmark.scalarSegmentHandle          thrpt        3,650          ops/us
AddBenchmark.scalarUnsafe                 thrpt        3,566          ops/us
AddBenchmark.unrolledArray                thrpt        4,953          ops/us
AddBenchmark.unrolledArrayHandle          thrpt        3,725          ops/us
AddBenchmark.unrolledSegment              thrpt        4,916          ops/us
AddBenchmark.unrolledSegmentHandle        thrpt        3,558          ops/us
AddBenchmark.unrolledSegmentHandle_float  thrpt        3,656          ops/us
AddBenchmark.unrolledSegmentHandle_long   thrpt        3,658          ops/us
AddBenchmark.unrolledSegment_long         thrpt        3,658          ops/us
AddBenchmark.unrolledUnsafe               thrpt        3,565          ops/us
AddBenchmark.unrolledUnsafe_float         thrpt        3,701          ops/us