--- js.go.dist	2021-01-23 15:50:00.931644132 -0800
+++ js.go	2021-01-26 10:27:12.735267010 -0800
@@ -27,12 +27,6 @@
 // nanHead are the upper 32 bits of a ref which are set if the value is not encoded as an IEEE 754 number (see above).
 const nanHead = 0x7FF80000
 
-// Wrapper is implemented by types that are backed by a JavaScript value.
-type Wrapper interface {
-	// JSValue returns a JavaScript value associated with an object.
-	JSValue() Value
-}
-
 // Value represents a JavaScript value. The zero value is the JavaScript value "undefined".
 // Values can be checked for equality with the Equal method.
 type Value struct {
@@ -50,11 +44,6 @@
 	typeFlagFunction
 )
 
-// JSValue implements Wrapper interface.
-func (v Value) JSValue() Value {
-	return v
-}
-
 func makeValue(r ref) Value {
 	var gcPtr *ref
 	typeFlag := (r >> 32) & 7
@@ -161,10 +150,10 @@
 // Panics if x is not one of the expected types.
 func ValueOf(x interface{}) Value {
 	switch x := x.(type) {
-	case Value: // should precede Wrapper to avoid a loop
+	case Value:
 		return x
-	case Wrapper:
-		return x.JSValue()
+	case Func:
+		return x.Value
 	case nil:
 		return valueNull
 	case bool:
@@ -220,6 +209,7 @@
 	}
 }
 
+//go:noescape
 func stringVal(x string) ref
 
 // Type represents the JavaScript type of a Value.
@@ -303,6 +293,7 @@
 	return r
 }
 
+//go:noescape
 func valueGet(v ref, p string) ref
 
 // Set sets the JavaScript property p of value v to ValueOf(x).
@@ -317,6 +308,7 @@
 	runtime.KeepAlive(xv)
 }
 
+//go:noescape
 func valueSet(v ref, p string, x ref)
 
 // Delete deletes the JavaScript property p of value v.
@@ -329,6 +321,7 @@
 	runtime.KeepAlive(v)
 }
 
+//go:noescape
 func valueDelete(v ref, p string)
 
 // Index returns JavaScript index i of value v.
@@ -358,9 +351,21 @@
 
 func valueSetIndex(v ref, i int, x ref)
 
-func makeArgs(args []interface{}) ([]Value, []ref) {
-	argVals := make([]Value, len(args))
-	argRefs := make([]ref, len(args))
+var (
+	argValsSlice []Value
+	argRefsSlice []ref
+)
+
+func makeArgs(args []interface{}) (argVals []Value, argRefs []ref) {
+	for i, _ := range argValsSlice {
+		argValsSlice[i] = Value{}
+	}
+	if len(args) > cap(argValsSlice) {
+		argValsSlice = make([]Value, 0, len(args))
+		argRefsSlice = make([]ref, 0, len(args))
+	}
+	argVals = argValsSlice[:len(args)]
+	argRefs = argRefsSlice[:len(args)]
 	for i, arg := range args {
 		v := ValueOf(arg)
 		argVals[i] = v
@@ -402,6 +407,7 @@
 	return makeValue(res)
 }
 
+//go:noescape
 func valueCall(v ref, m string, args []ref) (ref, bool)
 
 // Invoke does a JavaScript call of the value v with the given arguments.
@@ -421,6 +427,7 @@
 	return makeValue(res)
 }
 
+//go:noescape
 func valueInvoke(v ref, args []ref) (ref, bool)
 
 // New uses JavaScript's "new" operator with value v as constructor and the given arguments.
@@ -440,6 +447,7 @@
 	return makeValue(res)
 }
 
+//go:noescape
 func valueNew(v ref, args []ref) (ref, bool)
 
 func (v Value) isNumber() bool {
@@ -541,6 +549,7 @@
 
 func valuePrepareString(v ref) (ref, int)
 
+//go:noescape
 func valueLoadString(v ref, b []byte)
 
 // InstanceOf reports whether v is an instance of type t according to JavaScript's instanceof operator.
@@ -577,6 +586,7 @@
 	return n
 }
 
+//go:noescape
 func copyBytesToGo(dst []byte, src ref) (int, bool)
 
 // CopyBytesToJS copies bytes from src to dst.
@@ -591,4 +601,5 @@
 	return n
 }
 
+//go:noescape
 func copyBytesToJS(dst ref, src []byte) (int, bool)