From f3d826a8a9a88d68d162d4faf88ec495a27f8f31 Mon Sep 17 00:00:00 2001
From: Robert Nagy <ronagy@icloud.com>
Date: Fri, 27 Oct 2023 16:27:36 +0200
Subject: [PATCH] stream: pre-allocate _events

---
 lib/internal/streams/duplex.js   | 15 +++++++++++++++
 lib/internal/streams/readable.js | 12 ++++++++++++
 lib/internal/streams/writable.js |  8 ++++++++
 3 files changed, 35 insertions(+)

diff --git a/lib/internal/streams/duplex.js b/lib/internal/streams/duplex.js
index 834d875be6c4d9..2b3fe64df9e03a 100644
--- a/lib/internal/streams/duplex.js
+++ b/lib/internal/streams/duplex.js
@@ -63,6 +63,21 @@ function Duplex(options) {
   if (!(this instanceof Duplex))
     return new Duplex(options);
 
+  this._events = {
+    close: undefined,
+    error: undefined,
+    prefinish: undefined,
+    finish: undefined,
+    drain: undefined,
+    data: undefined,
+    end: undefined,
+    pause: undefined,
+    resume: undefined,
+    readable: undefined,
+    pipe: undefined,
+    unpipe: undefined,
+  };
+
   this._readableState = new Readable.ReadableState(options, this, true);
   this._writableState = new Writable.WritableState(options, this, true);
 
diff --git a/lib/internal/streams/readable.js b/lib/internal/streams/readable.js
index 80798a35dcb34f..83f09194a6358d 100644
--- a/lib/internal/streams/readable.js
+++ b/lib/internal/streams/readable.js
@@ -316,6 +316,18 @@ function Readable(options) {
   if (!(this instanceof Readable))
     return new Readable(options);
 
+  this._events = {
+    close: undefined,
+    error: undefined,
+    data: undefined,
+    end: undefined,
+    pause: undefined,
+    resume: undefined,
+    readable: undefined,
+    pipe: undefined,
+    unpipe: undefined,
+  };
+
   this._readableState = new ReadableState(options, this, false);
 
   if (options) {
diff --git a/lib/internal/streams/writable.js b/lib/internal/streams/writable.js
index 74573033eaa44f..69fb2be7f0c370 100644
--- a/lib/internal/streams/writable.js
+++ b/lib/internal/streams/writable.js
@@ -382,6 +382,14 @@ function Writable(options) {
   if (!(this instanceof Writable))
     return new Writable(options);
 
+    this._events = {
+      close: undefined,
+      error: undefined,
+      prefinish: undefined,
+      finish: undefined,
+      drain: undefined,
+    };
+
   this._writableState = new WritableState(options, this, false);
 
   if (options) {