crypto: skip string tag allocation in AlgorithmIdentifier fast path

Use a direct `typeof` check in `converters.object` and
`converters.AlgorithmIdentifier` instead of the generic `type()` helper,
which returned an intermediate 'Object' / 'Null' / ... string tag.

Signed-off-by: Filip Skokan <panva.ip@gmail.com>

Author: panva

lib/internal/crypto/webidl.js

@@ -95,6 +95,13 @@ function type(V) {
   }
 }
 
+// Fast check for the WebIDL Object type: a non-null object or a function.
+// Equivalent to `type(V) === 'Object'` but avoids allocating and comparing
+// the intermediate string tag on hot paths.
+function isObjectType(V) {
+  return V !== null && (typeof V === 'object' || typeof V === 'function');
+}
+
 const integerPart = MathTrunc;
 
 function validateByteLength(buf, name, target) {
@@ -184,7 +191,7 @@ converters.DOMString = function(V, opts = kEmptyObject) {
 };
 
 converters.object = (V, opts) => {
-  if (type(V) !== 'Object') {
+  if (!isObjectType(V)) {
     throw makeException(
       'is not an object.',
       opts);
@@ -339,8 +346,8 @@ function createInterfaceConverter(name, prototype) {
 
 converters.AlgorithmIdentifier = (V, opts) => {
   // Union for (object or DOMString)
-  if (type(V) === 'Object') {
-    return converters.object(V, opts);
+  if (isObjectType(V)) {
+    return V;
   }
   return converters.DOMString(V, opts);
 };