3 files changed, 14 insertions, 2 deletions
diff --git a/ext/node/lib.rs b/ext/node/lib.rs
index f139f0c7b..6d496f001 100644
--- a/ext/node/lib.rs
+++ b/ext/node/lib.rs
@@ -9,7 +9,10 @@ use deno_core::error::AnyError;
 use deno_core::located_script_name;
 use deno_core::op;
 use deno_core::serde_json;
+use deno_core::serde_v8;
 use deno_core::url::Url;
+#[allow(unused_imports)]
+use deno_core::v8;
 use deno_core::JsRuntime;
 use deno_core::ModuleSpecifier;
 use deno_fs::sync::MaybeSend;
@@ -130,6 +133,11 @@ fn op_node_build_os() -> String {
     .to_string()
 }
 
+#[op(fast)]
+fn op_is_any_arraybuffer(value: serde_v8::Value) -> bool {
+  value.v8_value.is_array_buffer() || value.v8_value.is_shared_array_buffer()
+}
+
 deno_core::extension!(deno_node,
   deps = [ deno_io, deno_fs ],
   parameters = [P: NodePermissions],
@@ -224,6 +232,7 @@ deno_core::extension!(deno_node,
     ops::zlib::brotli::op_brotli_decompress_stream_end,
     ops::http::op_node_http_request<P>,
     op_node_build_os,
+    op_is_any_arraybuffer,
     ops::require::op_require_init_paths,
     ops::require::op_require_node_module_paths<P>,
     ops::require::op_require_proxy_path,
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 {