Specify size when making map

oschwald · oschwald · commit 14e00f8062d4 · 2019-09-08T13:35:15.000-07:00
This doesn't really improve much with the sizes we normally see. Maybe
it would help more with larger maps.
diff --git a/decoder.go b/decoder.go
@@ -456,7 +456,7 @@ func (d *decoder) decodeMap(
 	depth int,
 ) (uint, error) {
 	if result.IsNil() {
-		result.Set(reflect.MakeMap(result.Type()))
+		result.Set(reflect.MakeMapWithSize(result.Type(), int(size)))
 	}
 
 	for i := uint(0); i < size; i++ {

Original file line number	Diff line number	Diff line change
`@@ -456,7 +456,7 @@ func (d *decoder) decodeMap(`
`456`	`456`	`depth int,`
`457`	`457`	`) (uint, error) {`
`458`	`458`	`if result.IsNil() {`
`459`		`- result.Set(reflect.MakeMap(result.Type()))`
	`459`	`+ result.Set(reflect.MakeMapWithSize(result.Type(), int(size)))`
`460`	`460`	`}`
`461`	`461`
`462`	`462`	`for i := uint(0); i < size; i++ {`