Add omitted files

$ CGO_ENABLED=0 go test -test.run=NONE -test.bench=. > old.benchcmp
$ CGO_ENABLED=1 go test -test.run=NONE -test.bench=. > new.benchcmp
$ benchcmp old.benchcmp new.benchcmp
benchmark                  old ns/op    new ns/op    delta
BenchmarkWordsDecode1e3         9735         5288  -45.68%
BenchmarkWordsDecode1e4       100229        55369  -44.76%
BenchmarkWordsDecode1e5      1037611       546420  -47.34%
BenchmarkWordsDecode1e6      9559352      5335307  -44.19%
BenchmarkWordsEncode1e3        16206         6629  -59.10%
BenchmarkWordsEncode1e4       140283        73161  -47.85%
BenchmarkWordsEncode1e5      1476657       781756  -47.06%
BenchmarkWordsEncode1e6     12702229      6997656  -44.91%
Benchmark_UFlat0              397307       221198  -44.33%
Benchmark_UFlat1             3890483      2008341  -48.38%
Benchmark_UFlat2               35810        15398  -57.00%
Benchmark_UFlat3              140850        74194  -47.32%
Benchmark_UFlat4              814575       426783  -47.61%
Benchmark_UFlat5              156995        81473  -48.10%
Benchmark_UFlat6               77645        43161  -44.41%
Benchmark_UFlat7               25415        13579  -46.57%
Benchmark_UFlat8             6372440      3412916  -46.44%
Benchmark_UFlat9             1453679       789956  -45.66%
Benchmark_UFlat10            1243146       660747  -46.85%
Benchmark_UFlat11            3903493      2146334  -45.02%
Benchmark_UFlat12            5106250      2696144  -47.20%
Benchmark_UFlat13            1641394       884969  -46.08%
Benchmark_UFlat14             262206       131174  -49.97%
Benchmark_UFlat15              32325        17047  -47.26%
Benchmark_UFlat16             366991       204877  -44.17%
Benchmark_UFlat17            1343988       770907  -42.64%
Benchmark_ZFlat0              579954       329812  -43.13%
Benchmark_ZFlat1             6564692      3504867  -46.61%
Benchmark_ZFlat2              902029       513700  -43.05%
Benchmark_ZFlat3              678722       384312  -43.38%
Benchmark_ZFlat4             1197389       654361  -45.35%
Benchmark_ZFlat5              262677       144939  -44.82%
Benchmark_ZFlat6              111249        60876  -45.28%
Benchmark_ZFlat7               39024        19420  -50.24%
Benchmark_ZFlat8             8046106      4387928  -45.47%
Benchmark_ZFlat9             2043167      1143139  -44.05%
Benchmark_ZFlat10            1781604       980528  -44.96%
Benchmark_ZFlat11            5478647      3078585  -43.81%
Benchmark_ZFlat12            7245995      3929863  -45.77%
Benchmark_ZFlat13            2432529      1371606  -43.61%
Benchmark_ZFlat14             420315       227494  -45.88%
Benchmark_ZFlat15              52378        26564  -49.28%
Benchmark_ZFlat16             567047       316196  -44.24%
Benchmark_ZFlat17            1630820       937310  -42.53%

benchmark                   old MB/s     new MB/s  speedup
BenchmarkWordsDecode1e3       102.71       189.08    1.84x
BenchmarkWordsDecode1e4        99.77       180.60    1.81x
BenchmarkWordsDecode1e5        96.38       183.01    1.90x
BenchmarkWordsDecode1e6       104.61       187.43    1.79x
BenchmarkWordsEncode1e3        61.70       150.85    2.44x
BenchmarkWordsEncode1e4        71.28       136.68    1.92x
BenchmarkWordsEncode1e5        67.72       127.92    1.89x
BenchmarkWordsEncode1e6        78.73       142.90    1.82x
Benchmark_UFlat0              257.73       462.93    1.80x
Benchmark_UFlat1              180.46       349.59    1.94x
Benchmark_UFlat2             3545.30      8244.61    2.33x
Benchmark_UFlat3              669.72      1271.39    1.90x
Benchmark_UFlat4              502.84       959.74    1.91x
Benchmark_UFlat5              156.71       301.98    1.93x
Benchmark_UFlat6              143.60       258.33    1.80x
Benchmark_UFlat7              146.41       274.01    1.87x
Benchmark_UFlat8              161.59       301.72    1.87x
Benchmark_UFlat9              104.62       192.53    1.84x
Benchmark_UFlat10             100.70       189.45    1.88x
Benchmark_UFlat11             109.33       198.83    1.82x
Benchmark_UFlat12              94.37       178.72    1.89x
Benchmark_UFlat13             312.67       579.93    1.85x
Benchmark_UFlat14             145.84       291.52    2.00x
Benchmark_UFlat15             130.77       247.95    1.90x
Benchmark_UFlat16             323.14       578.82    1.79x
Benchmark_UFlat17             137.14       239.09    1.74x
Benchmark_ZFlat0              176.57       310.48    1.76x
Benchmark_ZFlat1              106.95       200.32    1.87x
Benchmark_ZFlat2              140.75       247.14    1.76x
Benchmark_ZFlat3              138.98       245.45    1.77x
Benchmark_ZFlat4              342.08       625.95    1.83x
Benchmark_ZFlat5               93.66       169.75    1.81x
Benchmark_ZFlat6              100.23       183.16    1.83x
Benchmark_ZFlat7               95.35       191.60    2.01x
Benchmark_ZFlat8              127.98       234.68    1.83x
Benchmark_ZFlat9               74.44       133.04    1.79x
Benchmark_ZFlat10              70.26       127.66    1.82x
Benchmark_ZFlat11              77.89       138.62    1.78x
Benchmark_ZFlat12              66.50       122.62    1.84x
Benchmark_ZFlat13             210.98       374.17    1.77x
Benchmark_ZFlat14              90.98       168.09    1.85x
Benchmark_ZFlat15              80.70       159.12    1.97x
Benchmark_ZFlat16             209.13       375.04    1.79x
Benchmark_ZFlat17             113.02       196.65    1.74x
$