From f8b414c22cdb52256a89e97f917fd387e657ba92 Mon Sep 17 00:00:00 2001
From: Lukas Wirth <lukas@zed.dev>
Date: Mon, 3 Nov 2025 13:28:32 +0100
Subject: [PATCH] zed: Reduce number of rayon threads, spawn with bigger stacks
 (#41812)

We already do this for the cli and remote server but forgot to do so for
the main binary

Release Notes:

- N/A *or* Added/Fixed/Improved ...
---
 Cargo.lock             | 1 +
 crates/zed/Cargo.toml  | 1 +
 crates/zed/src/main.rs | 7 +++++++
 3 files changed, 9 insertions(+)

diff --git a/Cargo.lock b/Cargo.lock
index 1ee239c3740bb0fba40f81b9cdae77a46d62d535..947d90338afea01f0096585c2b1fb74ac907bbf1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -21233,6 +21233,7 @@ dependencies = [
  "project_symbols",
  "prompt_store",
  "proto",
+ "rayon",
  "recent_projects",
  "release_channel",
  "remote",
diff --git a/crates/zed/Cargo.toml b/crates/zed/Cargo.toml
index 9f6196c1482bcff2db9b7812dfb75b1471fec273..ebb3d8beb321cb6ee42cec84ddf7f456672a0265 100644
--- a/crates/zed/Cargo.toml
+++ b/crates/zed/Cargo.toml
@@ -73,6 +73,7 @@ gpui = { workspace = true, features = [
     "windows-manifest",
 ] }
 gpui_tokio.workspace = true
+rayon.workspace = true
 
 edit_prediction_button.workspace = true
 http_client.workspace = true
diff --git a/crates/zed/src/main.rs b/crates/zed/src/main.rs
index b873a58d3b61338b25c5908c2f87b62acb95d6f6..18903d888090bbc1fa0955d46417486a3f9fe13b 100644
--- a/crates/zed/src/main.rs
+++ b/crates/zed/src/main.rs
@@ -257,6 +257,13 @@ pub fn main() {
         return;
     }
 
+    rayon::ThreadPoolBuilder::new()
+        .num_threads(4)
+        .stack_size(10 * 1024 * 1024)
+        .thread_name(|ix| format!("RayonWorker{}", ix))
+        .build_global()
+        .unwrap();
+
     log::info!(
         "========== starting zed version {}, sha {} ==========",
         app_version,