From 1afe87571730ba1c42688526abfb2bedcaee607a Mon Sep 17 00:00:00 2001
From: cyqsimon <28627918+cyqsimon@users.noreply.github.com>
Date: Wed, 8 May 2024 16:10:55 +0800
Subject: [PATCH] Only start offload worker thread when there's more than 1
 core

---
 src/bin/bat/app.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/bin/bat/app.rs b/src/bin/bat/app.rs
index 6fc85321..25720cb2 100644
--- a/src/bin/bat/app.rs
+++ b/src/bin/bat/app.rs
@@ -2,6 +2,7 @@ use std::collections::HashSet;
 use std::env;
 use std::io::IsTerminal;
 use std::path::{Path, PathBuf};
+use std::thread::available_parallelism;
 
 use crate::{
     clap_app,
@@ -125,7 +126,9 @@ impl App {
         // start building glob matchers for builtin mappings immediately
         // this is an appropriate approach because it's statistically likely that
         // all the custom mappings need to be checked
-        syntax_mapping.start_offload_build_all();
+        if available_parallelism()?.get() > 1 {
+            syntax_mapping.start_offload_build_all();
+        }
 
         if let Some(values) = self.matches.get_many::<String>("ignored-suffix") {
             for suffix in values {