From fa42e4028189c8a4fb1ac80d9db30368de4c700b Mon Sep 17 00:00:00 2001
From: Kenzie Togami <ket1999@gmail.com>
Date: Sat, 26 Oct 2019 16:44:23 -0700
Subject: [PATCH] Limit expression thread count to processor count.

---
 .../worldedit/internal/expression/Expression.java     | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/Expression.java b/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/Expression.java
index 147378934..90e437136 100644
--- a/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/Expression.java
+++ b/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/Expression.java
@@ -74,11 +74,12 @@ import java.util.concurrent.TimeoutException;
 public class Expression {
 
     private static final ThreadLocal<Stack<Expression>> instance = new ThreadLocal<>();
-    private static final ExecutorService evalThread = Executors.newCachedThreadPool(
-            new ThreadFactoryBuilder()
-                    .setDaemon(true)
-                    .setNameFormat("worldedit-expression-eval-%d")
-                    .build());
+    private static final ExecutorService evalThread = Executors.newFixedThreadPool(
+        Runtime.getRuntime().availableProcessors(),
+        new ThreadFactoryBuilder()
+            .setDaemon(true)
+            .setNameFormat("worldedit-expression-eval-%d")
+            .build());
 
     private final SlotTable slots = new SlotTable();
     private final List<String> providedSlots;