1 files changed, 17 insertions, 11 deletions
diff --git a/src/js/node/stream.js b/src/js/node/stream.js
index 9344fa73f..741b2f65c 100644
--- a/src/js/node/stream.js
+++ b/src/js/node/stream.js
@@ -1,15 +1,20 @@
 // Hardcoded module "node:stream" / "readable-stream"
 // "readable-stream" npm package
 // just transpiled
-var { isPromise, isCallable, direct, Object } = globalThis[Symbol.for("Bun.lazy")]("primordials");
-import { EventEmitter as EE } from "bun:events_native";
-import { StringDecoder } from "node:string_decoder";
 
-globalThis.__IDS_TO_TRACK = process.env.DEBUG_TRACK_EE?.length
-  ? process.env.DEBUG_TRACK_EE.split(",")
-  : process.env.DEBUG_STREAMS?.length
-  ? process.env.DEBUG_STREAMS.split(",")
-  : null;
+// This must go at the top of the file, before any side effects.
+// IS_BUN_DEVELOPMENT is a bundle-only global variable that is set to true when
+// building a development bundle.
+const __TRACK_EE__ = IS_BUN_DEVELOPMENT && !!process.env.DEBUG_TRACK_EE;
+const __DEBUG__ = IS_BUN_DEVELOPMENT && !!(process.env.DEBUG || process.env.DEBUG_STREAMS || __TRACK_EE__);
+
+if (__DEBUG__) {
+  globalThis.__IDS_TO_TRACK = process.env.DEBUG_TRACK_EE?.length
+    ? process.env.DEBUG_TRACK_EE.split(",")
+    : process.env.DEBUG_STREAMS?.length
+    ? process.env.DEBUG_STREAMS.split(",")
+    : null;
+}
 
 // Separating DEBUG, DEBUG_STREAMS and DEBUG_TRACK_EE env vars makes it easier to focus on the
 // events in this file rather than all debug output across all files
@@ -18,9 +23,6 @@ globalThis.__IDS_TO_TRACK = process.env.DEBUG_TRACK_EE?.length
 // The events and/or all of the outputs for the given stream IDs assigned at stream construction
 // By default, child_process gives
 
-const __TRACK_EE__ = !!process.env.DEBUG_TRACK_EE;
-const __DEBUG__ = !!(process.env.DEBUG || process.env.DEBUG_STREAMS || __TRACK_EE__);
-
 var debug = __DEBUG__
   ? globalThis.__IDS_TO_TRACK
     ? // If we are tracking IDs for debug event emitters, we should prefix the debug output with the ID
@@ -32,6 +34,10 @@ var debug = __DEBUG__
     : (...args) => console.log(...args.slice(0, -1))
   : () => {};
 
+var { isPromise, isCallable, direct, Object } = globalThis[Symbol.for("Bun.lazy")]("primordials");
+import { EventEmitter as EE } from "bun:events_native";
+import { StringDecoder } from "node:string_decoder";
+
 var __create = Object.create;
 var __defProp = Object.defineProperty;
 var __getOwnPropDesc = Object.getOwnPropertyDescriptor;