From 4d7b7a96b14dd52a320bc10317144a1f98697d80 Mon Sep 17 00:00:00 2001
From: Xe Iaso <me@xeiaso.net>
Date: Thu, 11 Sep 2025 13:56:34 +0000
Subject: [PATCH] fix(js/algorithms/fast): handle old browsers

Closes #1082

Signed-off-by: Xe Iaso <me@xeiaso.net>
---
 web/js/algorithms/fast.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/web/js/algorithms/fast.ts b/web/js/algorithms/fast.ts
index 6f3483b4..178cef84 100644
--- a/web/js/algorithms/fast.ts
+++ b/web/js/algorithms/fast.ts
@@ -5,13 +5,16 @@ interface ProcessOptions {
   version: string;
 }
 
+const getHardwareConcurrency = () =>
+  navigator.hardwareConcurrency !== undefined ? navigator.hardwareConcurrency : 1;
+
 export default function process(
   options: ProcessOptions,
   data: string,
   difficulty: number = 5,
   signal: AbortSignal | null = null,
   progressCallback?: ProgressCallback,
-  threads: number = Math.trunc(Math.max(navigator.hardwareConcurrency / 2, 1)),
+  threads: number = Math.trunc(Math.max(getHardwareConcurrency() / 2, 1)),
 ): Promise<string> {
   console.debug("fast algo");