feat: introduce hash cache to improve performance

This is part of the optimizations from BSC, microbench show the change
could introduce speed up of simple erc20 transfer scenario.

The original PR of BSC: bnb-chain/bsc#257

crypto/crypto.go

@@ -24,6 +24,7 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
+	"github.com/VictoriaMetrics/fastcache"
 	"hash"
 	"io"
 	"math/big"
@@ -47,6 +48,8 @@ const DigestLength = 32
 var (
 	secp256k1N, _  = new(big.Int).SetString("fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141", 16)
 	secp256k1halfN = new(big.Int).Div(secp256k1N, big.NewInt(2))
+
+	keccakState256Cache = fastcache.New(100 * 1024 * 1024)
 )
 
 var errInvalidPubkey = errors.New("invalid secp256k1 public key")
@@ -66,31 +69,52 @@ func NewKeccakState() KeccakState {
 
 // HashData hashes the provided data using the KeccakState and returns a 32 byte hash
 func HashData(kh KeccakState, data []byte) (h common.Hash) {
+	if hash, ok := keccakState256Cache.HasGet(nil, data); ok {
+		return common.BytesToHash(hash)
+	}
 	kh.Reset()
 	kh.Write(data)
 	kh.Read(h[:])
+	keccakState256Cache.Set(data, h.Bytes())
 	return h
 }
 
 // Keccak256 calculates and returns the Keccak256 hash of the input data.
 func Keccak256(data ...[]byte) []byte {
+	if len(data) == 1 {
+		if hash, ok := keccakState256Cache.HasGet(nil, data[0]); ok {
+			return hash
+		}
+	}
 	b := make([]byte, 32)
 	d := NewKeccakState()
 	for _, b := range data {
 		d.Write(b)
 	}
 	d.Read(b)
+	if len(data) == 1 {
+		keccakState256Cache.Set(data[0], b)
+	}
 	return b
 }
 
 // Keccak256Hash calculates and returns the Keccak256 hash of the input data,
 // converting it to an internal Hash data structure.
 func Keccak256Hash(data ...[]byte) (h common.Hash) {
+	if len(data) == 1 {
+		if hash, ok := keccakState256Cache.HasGet(nil, data[0]); ok {
+			return common.BytesToHash(hash)
+		}
+	}
+
 	d := NewKeccakState()
 	for _, b := range data {
 		d.Write(b)
 	}
 	d.Read(h[:])
+	if len(data) == 1 {
+		keccakState256Cache.Set(data[0], h.Bytes())
+	}
 	return h
 }