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trie: reduce allocs in recHash (#27770)

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Marius van der Wijden 2023-08-18 22:41:19 +02:00 committed by GitHub
parent 7dea9c10cd
commit 5976e58415
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 14 additions and 10 deletions
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7
trie/encoding.go
View File

@ -51,9 +51,8 @@ func hexToCompact(hex []byte) []byte {
return buf
}
// hexToCompactInPlace places the compact key in input buffer, returning the length
// needed for the representation
func hexToCompactInPlace(hex []byte) int {
// hexToCompactInPlace places the compact key in input buffer, returning the compacted key.
func hexToCompactInPlace(hex []byte) []byte {
var (
hexLen = len(hex) // length of the hex input
firstByte = byte(0)
@ -77,7 +76,7 @@ func hexToCompactInPlace(hex []byte) int {
hex[bi] = hex[ni]<<4 | hex[ni+1]
}
hex[0] = firstByte
return binLen
return hex[:binLen]
}
func compactToHex(compact []byte) []byte {

13
trie/encoding_test.go
View File

@ -86,8 +86,7 @@ func TestHexToCompactInPlace(t *testing.T) {
} {
hexBytes, _ := hex.DecodeString(key)
exp := hexToCompact(hexBytes)
sz := hexToCompactInPlace(hexBytes)
got := hexBytes[:sz]
got := hexToCompactInPlace(hexBytes)
if !bytes.Equal(exp, got) {
t.Fatalf("test %d: encoding err\ninp %v\ngot %x\nexp %x\n", i, key, got, exp)
}
@ -102,8 +101,7 @@ func TestHexToCompactInPlaceRandom(t *testing.T) {
hexBytes := keybytesToHex(key)
hexOrig := []byte(string(hexBytes))
exp := hexToCompact(hexBytes)
sz := hexToCompactInPlace(hexBytes)
got := hexBytes[:sz]
got := hexToCompactInPlace(hexBytes)
if !bytes.Equal(exp, got) {
t.Fatalf("encoding err \ncpt %x\nhex %x\ngot %x\nexp %x\n",
@ -119,6 +117,13 @@ func BenchmarkHexToCompact(b *testing.B) {
}
}
func BenchmarkHexToCompactInPlace(b *testing.B) {
testBytes := []byte{0, 15, 1, 12, 11, 8, 16 /*term*/}
for i := 0; i < b.N; i++ {
hexToCompactInPlace(testBytes)
}
}
func BenchmarkCompactToHex(b *testing.B) {
testBytes := []byte{0, 15, 1, 12, 11, 8, 16 /*term*/}
for i := 0; i < b.N; i++ {

4
trie/stacktrie.go
View File

@ -444,7 +444,7 @@ func (st *StackTrie) hashRec(hasher *hasher, path []byte) {
case extNode:
st.children[0].hashRec(hasher, append(path, st.key...))
n := shortNode{Key: hexToCompact(st.key)}
n := shortNode{Key: hexToCompactInPlace(st.key)}
if len(st.children[0].val) < 32 {
n.Val = rawNode(st.children[0].val)
} else {
@ -460,7 +460,7 @@ func (st *StackTrie) hashRec(hasher *hasher, path []byte) {
case leafNode:
st.key = append(st.key, byte(16))
n := shortNode{Key: hexToCompact(st.key), Val: valueNode(st.val)}
n := shortNode{Key: hexToCompactInPlace(st.key), Val: valueNode(st.val)}
n.encode(hasher.encbuf)
encodedNode = hasher.encodedBytes()