Benchmark encrypt and decrypt

[crossle]

Before we use golang library for ed25519, and dart ffi call it, but not good for multiple platform support.
Now we use pure dart encrypt and decrypt ed25519, should we compare with use rust implements the ed25519 with dart ffi?

[crossle]

https://github.com/ilap/pinenacl-dart

[Tougee]

Add benchmark for ed25519 https://github.com/Tougee/ed25519#Benchmark

[Tougee]

Pure Dart benchmark branch
FFI benchmark branch

type	rate	iterations	time	data throughput
Pure Dart JIT sign	55.08 MB/s	276 iterations	5010 ms	276.00 MB
Pure Dart JIT verify	108.39 MB/s	542 iterations	5000 ms	542.00 MB
Pure Dart AOT sign	22.59 MB/s	113 iterations	5001 ms	113.00 MB
Pure Dart AOT verify	45.86 MB/s	230 iterations	5015 ms	230.00 MB
FFI JIT sign	24.19 MB/s	121 iterations	5003 ms	121.00 MB
FFI JIT verify	25.04 MB/s	126 iterations	5032 ms	126.00 MB
FFI AOT sign	26.98 MB/s	135 iterations	5004 ms	135.00 MB
FFI AOT verify	26.83 MB/s	135 iterations	5031 ms	135.00 MB

[crossle]

How about the new Ed25519 version? @Tougee

[crossle]

https://github.com/google/webcrypto.dart