From d9744f3b03239422a5d7f0eda3293a90c62e8600 Mon Sep 17 00:00:00 2001
From: Alex Povel <git@alexpovel.de>
Date: Wed, 17 Jul 2024 09:47:25 +0200
Subject: [PATCH] ignore: improve multithreading heuristic

This copies the one found in ripgrep.

See also:
https://github.com/BurntSushi/ripgrep/blob/71d71d2d98964653cdfcfa315802f518664759d7/crates/core/flags/hiargs.rs#L172

Closes #2854, Closes #2856
---
 crates/ignore/src/walk.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/ignore/src/walk.rs b/crates/ignore/src/walk.rs
index 03a6e2d0..448e599e 100644
--- a/crates/ignore/src/walk.rs
+++ b/crates/ignore/src/walk.rs
@@ -1305,7 +1305,7 @@ impl WalkParallel {
 
     fn threads(&self) -> usize {
         if self.threads == 0 {
-            2
+            std::thread::available_parallelism().map_or(1, |n| n.get()).min(12)
         } else {
             self.threads
         }