StringCompare: baseline intrinsic

Benchmark                              (size)  Mode  Cnt        Score         Error  Units
StringCompareBench.stringCompareLL          1  avgt    5      120.120 ?     146.116  ns/op
StringCompareBench.stringCompareLL         32  avgt    5      274.557 ?     127.621  ns/op
StringCompareBench.stringCompareLL        256  avgt    5      367.213 ?       2.329  ns/op
StringCompareBench.stringCompareLL        512  avgt    5      561.533 ?       2.948  ns/op
StringCompareBench.stringCompareLL       1024  avgt    5     1290.704 ?     220.470  ns/op
StringCompareBench.stringCompareLL    1000000  avgt    5   757933.928 ?   13549.760  ns/op
StringCompareBench.stringCompareLU          1  avgt    5      201.812 ?     282.461  ns/op
StringCompareBench.stringCompareLU         32  avgt    5      314.763 ?       2.773  ns/op
StringCompareBench.stringCompareLU        256  avgt    5     1964.489 ?    1698.686  ns/op
StringCompareBench.stringCompareLU        512  avgt    5     3729.265 ?    3335.606  ns/op
StringCompareBench.stringCompareLU       1024  avgt    5     4156.911 ?      23.905  ns/op
StringCompareBench.stringCompareLU    1000000  avgt    5  3925342.840 ?   20551.994  ns/op
StringCompareBench.stringCompareUL          1  avgt    5      162.190 ?     116.415  ns/op
StringCompareBench.stringCompareUL         32  avgt    5      482.578 ?       9.322  ns/op
StringCompareBench.stringCompareUL        256  avgt    5     1171.379 ?      10.262  ns/op
StringCompareBench.stringCompareUL        512  avgt    5     2936.228 ?    3939.546  ns/op
StringCompareBench.stringCompareUL       1024  avgt    5     4183.655 ?      34.402  ns/op
StringCompareBench.stringCompareUL    1000000  avgt    5  3938056.200 ?    1064.159  ns/op
StringCompareBench.stringCompareUU          1  avgt    5      106.634 ?      49.482  ns/op
StringCompareBench.stringCompareUU         32  avgt    5      216.222 ?       4.977  ns/op
StringCompareBench.stringCompareUU        256  avgt    5      674.587 ?       6.570  ns/op
StringCompareBench.stringCompareUU        512  avgt    5     1205.515 ?       2.315  ns/op
StringCompareBench.stringCompareUU       1024  avgt    5     3661.606 ?     134.903  ns/op
StringCompareBench.stringCompareUU    1000000  avgt    5  2426898.112 ?    3748.507  ns/op


StringCompare: optimized intrinsic

Benchmark                              (size)  Mode  Cnt        Score         Error  Units
StringCompareBench.stringCompareLL          1  avgt    5      128.338 ?      59.761  ns/op
StringCompareBench.stringCompareLL         32  avgt    5      184.536 ?     120.564  ns/op
StringCompareBench.stringCompareLL        256  avgt    5      452.494 ?     522.209  ns/op
StringCompareBench.stringCompareLL        512  avgt    5      419.470 ?       1.198  ns/op
StringCompareBench.stringCompareLL       1024  avgt    5      533.171 ?      30.945  ns/op
StringCompareBench.stringCompareLL    1000000  avgt    5   268221.377 ?   51316.779  ns/op
StringCompareBench.stringCompareLU          1  avgt    5      180.177 ?     274.397  ns/op
StringCompareBench.stringCompareLU         32  avgt    5      300.049 ?       0.820  ns/op
StringCompareBench.stringCompareLU        256  avgt    5      988.164 ?       4.671  ns/op
StringCompareBench.stringCompareLU        512  avgt    5     1463.740 ?      14.278  ns/op
StringCompareBench.stringCompareLU       1024  avgt    5     2053.975 ?      16.513  ns/op
StringCompareBench.stringCompareLU    1000000  avgt    5  1161266.450 ?    2146.214  ns/op
StringCompareBench.stringCompareUL          1  avgt    5      138.864 ?      20.823  ns/op
StringCompareBench.stringCompareUL         32  avgt    5      503.220 ?     162.694  ns/op
StringCompareBench.stringCompareUL        256  avgt    5     2074.882 ?     633.990  ns/op
StringCompareBench.stringCompareUL        512  avgt    5     2349.675 ?    3122.559  ns/op
StringCompareBench.stringCompareUL       1024  avgt    5     2478.018 ?    1381.482  ns/op
StringCompareBench.stringCompareUL    1000000  avgt    5  1174196.853 ?    6457.432  ns/op
StringCompareBench.stringCompareUU          1  avgt    5       89.349 ?      11.719  ns/op
StringCompareBench.stringCompareUU         32  avgt    5      319.053 ?     567.295  ns/op
StringCompareBench.stringCompareUU        256  avgt    5      618.865 ?     957.592  ns/op
StringCompareBench.stringCompareUU        512  avgt    5      655.506 ?       1.255  ns/op
StringCompareBench.stringCompareUU       1024  avgt    5     1635.800 ?      19.892  ns/op
StringCompareBench.stringCompareUU    1000000  avgt    5   592797.918 ?  141436.625  ns/op