diff --git a/src/utils/buffer.ts b/src/utils/buffer.ts
index cde4c789..b8ead4ee 100644
--- a/src/utils/buffer.ts
+++ b/src/utils/buffer.ts
@@ -35,8 +35,7 @@ export const timingSafeEqual = async (
     hashFunction = sha256
   }
 
-  const sa = await hashFunction(a)
-  const sb = await hashFunction(b)
+  const [sa, sb] = await Promise.all([hashFunction(a), hashFunction(b)])
 
   if (!sa || !sb) {
     return false