2 files changed, 5 insertions, 2 deletions
diff --git a/ext/node/polyfills/internal_binding/stream_wrap.ts b/ext/node/polyfills/internal_binding/stream_wrap.ts
index 4d2c8c4d7..27870b20b 100644
--- a/ext/node/polyfills/internal_binding/stream_wrap.ts
+++ b/ext/node/polyfills/internal_binding/stream_wrap.ts
@@ -279,7 +279,7 @@ export class LibuvStreamWrap extends HandleWrap {
 
   /** Internal method for reading from the attached stream. */
   async #read() {
-    let buf = new Uint8Array(SUGGESTED_SIZE);
+    let buf = BUF;
 
     let nread: number | null;
     try {
@@ -375,3 +375,5 @@ export class LibuvStreamWrap extends HandleWrap {
     return;
   }
 }
+
+const BUF = new Uint8Array(SUGGESTED_SIZE);
diff --git a/ext/node/polyfills/internal_binding/types.ts b/ext/node/polyfills/internal_binding/types.ts
index 28cf395f8..fe697f194 100644
--- a/ext/node/polyfills/internal_binding/types.ts
+++ b/ext/node/polyfills/internal_binding/types.ts
@@ -25,6 +25,7 @@
 // deno-lint-ignore-file prefer-primordials
 
 const { core } = globalThis.__bootstrap;
+const { ops } = core;
 
 // https://tc39.es/ecma262/#sec-object.prototype.tostring
 const _toString = Object.prototype.toString;
@@ -89,7 +90,7 @@ function isObjectLike(
 export function isAnyArrayBuffer(
   value: unknown,
 ): value is ArrayBuffer | SharedArrayBuffer {
-  return isArrayBuffer(value) || isSharedArrayBuffer(value);
+  return ops.op_is_any_arraybuffer(value);
 }
 
 export function isArgumentsObject(value: unknown): value is IArguments {