From 74e4c7f80ff1cee534f2da2870d0ddf73f7cb932 Mon Sep 17 00:00:00 2001
From: Rui He <118280419+ruihe774@users.noreply.github.com>
Date: Sat, 30 Sep 2023 22:21:06 +0800
Subject: feat(node/os): Add `availableParallelism` (#20745)

---
 ext/node/polyfills/os.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'ext/node/polyfills/os.ts')

diff --git a/ext/node/polyfills/os.ts b/ext/node/polyfills/os.ts
index 3245ad7ab..06de4ad44 100644
--- a/ext/node/polyfills/os.ts
+++ b/ext/node/polyfills/os.ts
@@ -102,6 +102,9 @@ export function arch(): string {
   return process.arch;
 }
 
+// deno-lint-ignore no-explicit-any
+(availableParallelism as any)[Symbol.toPrimitive] = (): number =>
+  availableParallelism();
 // deno-lint-ignore no-explicit-any
 (arch as any)[Symbol.toPrimitive] = (): string => process.arch;
 // deno-lint-ignore no-explicit-any
@@ -354,10 +357,16 @@ export function userInfo(
   };
 }
 
+/* Returns an estimate of the default amount of parallelism a program should use. */
+export function availableParallelism(): number {
+  return navigator.hardwareConcurrency;
+}
+
 export const EOL = isWindows ? "\r\n" : "\n";
 export const devNull = isWindows ? "\\\\.\\nul" : "/dev/null";
 
 export default {
+  availableParallelism,
   arch,
   cpus,
   endianness,
-- 
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