From 83f6d4bf940e8e6fa1393139df51916dbb94470b Mon Sep 17 00:00:00 2001
From: Aaron O'Mullan <aaron.omullan@gmail.com>
Date: Wed, 14 Apr 2021 13:56:14 +0200
Subject: [PATCH] perf(js/http): avoid v8 deopt in async iterator (#10160)

---
 runtime/js/40_http.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/runtime/js/40_http.js b/runtime/js/40_http.js
index 6b9d3dca68..3916b1df45 100644
--- 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 };
         },
       };
     }