gmsm/sm9/README.md

This part codes mainly refer two projects:

1. bn256, 主要是基域运算
2. gmssl sm9，主要是2-4-12塔式扩域，以及r-ate等

SM9 Sign Benchmark

goos: windows
goarch: amd64
pkg: github.com/emmansun/gmsm/sm9
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
BenchmarkSign-6   	    1344	    871597 ns/op	   35870 B/op	    1013 allocs/op

SM9 Verify Benchmark

goos: windows
goarch: amd64
pkg: github.com/emmansun/gmsm/sm9
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
BenchmarkVerify-6   	     352	   3331673 ns/op	  237676 B/op	    6283 allocs/op

SM9 Encrypt(XOR) Benchmark

goos: windows
goarch: amd64
pkg: github.com/emmansun/gmsm/sm9
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
BenchmarkEncrypt-6   	    1120	    971188 ns/op	   38125 B/op	    1036 allocs/op

SM9 Decrypt(XOR) Benchmark

goos: windows
goarch: amd64
pkg: github.com/emmansun/gmsm/sm9
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
BenchmarkDecrypt-6   	     507	   2345492 ns/op	  202360 B/op	    5228 allocs/op

SM9 Generate User Sign Private Key Benchmark

goos: windows
goarch: amd64
pkg: github.com/emmansun/gmsm/sm9
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
BenchmarkGenerateSignPrivKey-6   	    8078	    147638 ns/op	    3176 B/op	      47 allocs/op

SM9 Generate User Encrypt Private Key Benchmark

goos: windows
goarch: amd64
pkg: github.com/emmansun/gmsm/sm9
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
BenchmarkGenerateEncryptPrivKey-6   	    3445	    326796 ns/op	    3433 B/op	      47 allocs/op

To further improve Verify()/Decrypt() performance, need to improve Pair() method performance.