Speed-up byte array testing.

paulmillr · Nov 8, 2024 · 03221c8 · 03221c8
1 parent d9371e7
commit 03221c8
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Showing 2 changed files with 2 additions and 4 deletions.
diff --git a/src/_assert.ts b/src/_assert.ts
@@ -9,8 +9,7 @@ function bool(b: boolean) {
 // copied from utils
 export function isBytes(a: unknown): a is Uint8Array {
   return (
-    a instanceof Uint8Array ||
-    (a != null && typeof a === 'object' && a.constructor.name === 'Uint8Array')
+    a instanceof Uint8Array || (ArrayBuffer.isView(a) && a.constructor.name === 'Uint8Array')
   );
 }
 

diff --git a/src/utils.ts b/src/utils.ts
@@ -12,8 +12,7 @@ import { bytes as abytes } from './_assert.js';
 // We can't reuse isBytes from _assert, because somehow this causes huge perf issues
 export function isBytes(a: unknown): a is Uint8Array {
   return (
-    a instanceof Uint8Array ||
-    (a != null && typeof a === 'object' && a.constructor.name === 'Uint8Array')
+    a instanceof Uint8Array || (ArrayBuffer.isView(a) && a.constructor.name === 'Uint8Array')
   );
 }