core/vm: optimize Memory.Set32

qianbin · qianbin · commit 2764a1d91f14 · 2022-05-11T14:29:06.000+08:00
diff --git a/core/vm/memory.go b/core/vm/memory.go
@@ -56,7 +56,8 @@ func (m *Memory) Set32(offset uint64, val *uint256.Int) {
 		panic("invalid memory: store empty")
 	}
 	// Fill in relevant bits
-	val.WriteToSlice(m.store[offset:])
+	b32 := val.Bytes32()
+	copy(m.store[offset:], b32[:])
 }
 
 // Resize resizes the memory to size

Original file line number	Diff line number	Diff line change
`@@ -56,7 +56,8 @@ func (m Memory) Set32(offset uint64, val uint256.Int) {`
`56`	`56`	`panic("invalid memory: store empty")`
`57`	`57`	`}`
`58`	`58`	`// Fill in relevant bits`
`59`		`- val.WriteToSlice(m.store[offset:])`
	`59`	`+ b32 := val.Bytes32()`
	`60`	`+ copy(m.store[offset:], b32[:])`
`60`	`61`	`}`
`61`	`62`
`62`	`63`	`// Resize resizes the memory to size`