perf(js/http): avoid v8 deopt in async iterator (denoland#10160)

zenozeng · Apr 14, 2021 · 83f6d4b · 83f6d4b
1 parent 262ee78
commit 83f6d4b
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/runtime/js/40_http.js b/runtime/js/40_http.js
@@ -81,8 +81,8 @@
       return {
         async next() {
           const reqEvt = await httpConn.nextRequest();
-          if (reqEvt === null) return { value: undefined, done: true };
-          return { value: reqEvt, done: false };
+          // Change with caution, current form avoids a v8 deopt
+          return { value: reqEvt, done: reqEvt === null };
         },
       };
     }