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README.md

murmur3

Build Status

Native Go implementation of Austin Appleby's third MurmurHash revision (aka
MurmurHash3).

Reference algorithm has been slightly hacked as to support the streaming mode
required by Go's standard Hash interface.

Benchmarks

Go tip as of 2014-06-12 (i.e almost go1.3), core i7 @ 3.4 Ghz. All runs
include hasher instantiation and sequence finalization.


Benchmark32_1        500000000     7.69 ns/op      130.00 MB/s
Benchmark32_2        200000000     8.83 ns/op      226.42 MB/s
Benchmark32_4        500000000     7.99 ns/op      500.39 MB/s
Benchmark32_8        200000000     9.47 ns/op      844.69 MB/s
Benchmark32_16       100000000     12.1 ns/op     1321.61 MB/s
Benchmark32_32       100000000     18.3 ns/op     1743.93 MB/s
Benchmark32_64        50000000     30.9 ns/op     2071.64 MB/s
Benchmark32_128       50000000     57.6 ns/op     2222.96 MB/s
Benchmark32_256       20000000      116 ns/op     2188.60 MB/s
Benchmark32_512       10000000      226 ns/op     2260.59 MB/s
Benchmark32_1024       5000000      452 ns/op     2263.73 MB/s
Benchmark32_2048       2000000      891 ns/op     2296.02 MB/s
Benchmark32_4096       1000000     1787 ns/op     2290.92 MB/s
Benchmark32_8192        500000     3593 ns/op     2279.68 MB/s
Benchmark128_1       100000000     26.1 ns/op       38.33 MB/s
Benchmark128_2       100000000     29.0 ns/op       69.07 MB/s
Benchmark128_4        50000000     29.8 ns/op      134.17 MB/s
Benchmark128_8        50000000     31.6 ns/op      252.86 MB/s
Benchmark128_16      100000000     26.5 ns/op      603.42 MB/s
Benchmark128_32      100000000     28.6 ns/op     1117.15 MB/s
Benchmark128_64       50000000     35.5 ns/op     1800.97 MB/s
Benchmark128_128      50000000     50.9 ns/op     2515.50 MB/s
Benchmark128_256      20000000     76.9 ns/op     3330.11 MB/s
Benchmark128_512      20000000      135 ns/op     3769.09 MB/s
Benchmark128_1024     10000000      250 ns/op     4094.38 MB/s
Benchmark128_2048      5000000      477 ns/op     4290.75 MB/s
Benchmark128_4096      2000000      940 ns/op     4353.29 MB/s
Benchmark128_8192      1000000     1838 ns/op     4455.47 MB/s



benchmark              Go1.0 MB/s    Go1.1 MB/s  speedup    Go1.2 MB/s  speedup    Go1.3 MB/s  speedup
Benchmark32_1               98.90        118.59    1.20x        114.79    0.97x        130.00    1.13x
Benchmark32_2              168.04        213.31    1.27x        210.65    0.99x        226.42    1.07x
Benchmark32_4              414.01        494.19    1.19x        490.29    0.99x        500.39    1.02x
Benchmark32_8              662.19        836.09    1.26x        836.46    1.00x        844.69    1.01x
Benchmark32_16             917.46       1304.62    1.42x       1297.63    0.99x       1321.61    1.02x
Benchmark32_32            1141.93       1737.54    1.52x       1728.24    0.99x       1743.93    1.01x
Benchmark32_64            1289.47       2039.51    1.58x       2038.20    1.00x       2071.64    1.02x
Benchmark32_128           1299.23       2097.63    1.61x       2177.13    1.04x       2222.96    1.02x
Benchmark32_256           1369.90       2202.34    1.61x       2213.15    1.00x       2188.60    0.99x
Benchmark32_512           1399.56       2255.72    1.61x       2264.49    1.00x       2260.59    1.00x
Benchmark32_1024          1410.90       2285.82    1.62x       2270.99    0.99x       2263.73    1.00x
Benchmark32_2048          1422.14       2297.62    1.62x       2269.59    0.99x       2296.02    1.01x
Benchmark32_4096          1420.53       2307.81    1.62x       2273.43    0.99x       2290.92    1.01x
Benchmark32_8192          1424.79       2312.87    1.62x       2286.07    0.99x       2279.68    1.00x
Benchmark128_1               8.32         30.15    3.62x         30.84    1.02x         38.33    1.24x
Benchmark128_2              16.38         59.72    3.65x         59.37    0.99x         69.07    1.16x
Benchmark128_4              32.26        112.96    3.50x        114.24    1.01x        134.17    1.17x
Benchmark128_8              62.68        217.88    3.48x        218.18    1.00x        252.86    1.16x
Benchmark128_16            128.47        451.57    3.51x        474.65    1.05x        603.42    1.27x
Benchmark128_32            246.18        910.42    3.70x        871.06    0.96x       1117.15    1.28x
Benchmark128_64            449.05       1477.64    3.29x       1449.24    0.98x       1800.97    1.24x
Benchmark128_128           762.61       2222.42    2.91x       2217.30    1.00x       2515.50    1.13x
Benchmark128_256          1179.92       3005.46    2.55x       2931.55    0.98x       3330.11    1.14x
Benchmark128_512          1616.51       3590.75    2.22x       3592.08    1.00x       3769.09    1.05x
Benchmark128_1024         1964.36       3979.67    2.03x       4034.01    1.01x       4094.38    1.01x
Benchmark128_2048         2225.07       4156.93    1.87x       4244.17    1.02x       4290.75    1.01x
Benchmark128_4096         2360.15       4299.09    1.82x       4392.35    1.02x       4353.29    0.99x
Benchmark128_8192         2411.50       4356.84    1.81x       4480.68    1.03x       4455.47    0.99x
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