Iterative Optimization on Hot Paths: Optimization 1: Pass by value

descriptor.go.diff

// Valuer creates a sql/driver.Valuer from the type and value.
-func (d Descriptor) Valuer(val reflect.Value) Valuer {
+func (d *Descriptor) Valuer(val reflect.Value) Valuer {
-	return Valuer{Descriptor: &d, value: val}
+	return Valuer{Descriptor: d, value: val}
 }

// Scanner creates a sql.Scanner from the descriptor.
-func (d Descriptor) Scanner() *Scanner { return &Scanner{Descriptor: &d} }
+func (d *Descriptor) Scanner() *Scanner { return &Scanner{Descriptor: d} }