perf(ext/websocket): special op for sending text data frames (#18507)

Similar to #18506 but for Text frames.

ext/websocket/01_websocket.js

@@ -325,10 +325,7 @@ class WebSocket extends EventTarget {
       const d = core.encode(string);
       this[_bufferedAmount] += d.byteLength;
       PromisePrototypeThen(
-        core.opAsync("op_ws_send", this[_rid], {
-          kind: "text",
-          value: string,
-        }),
+        core.opAsync("op_ws_send_text", this[_rid], string),
         () => {
           this[_bufferedAmount] -= d.byteLength;
         },

ext/websocket/lib.rs

@@ -402,6 +402,20 @@ pub enum SendValue {
   Ping,
 }
 
+#[op]
+pub async fn op_ws_send_text(
+  state: Rc<RefCell<OpState>>,
+  rid: ResourceId,
+  data: String,
+) -> Result<(), AnyError> {
+  let resource = state
+    .borrow_mut()
+    .resource_table
+    .get::<WsStreamResource>(rid)?;
+  resource.send(Message::Text(data)).await?;
+  Ok(())
+}
+
 #[op]
 pub async fn op_ws_send(
   state: Rc<RefCell<OpState>>,
@@ -504,6 +518,7 @@ deno_core::extension!(deno_websocket,
     op_ws_send,
     op_ws_close,
     op_ws_next_event,
+    op_ws_send_text,
   ],
   esm = [ "01_websocket.js", "02_websocketstream.js" ],
   options = {