From f87f4ee855c60432f889090e35f3175413f72378 Mon Sep 17 00:00:00 2001
From: Dillon <dsharlet@gmail.com>
Date: Fri, 24 Jul 2026 08:44:02 -0700
Subject: [PATCH] Relax memory ordering for parallel loop iteration

---
 slinky/base/thread_pool_impl.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/slinky/base/thread_pool_impl.cc b/slinky/base/thread_pool_impl.cc
index 3b6fdf11..9e7e61a1 100644
--- a/slinky/base/thread_pool_impl.cc
+++ b/slinky/base/thread_pool_impl.cc
@@ -44,7 +44,7 @@ void thread_pool_impl::task_impl::destroy() {
 std::size_t thread_pool_impl::task_impl::shard::work(task_body& body) {
   std::size_t done = 0;
   while (true) {
-    std::size_t i = this->i++;
+    std::size_t i = this->i.fetch_add(1, std::memory_order_relaxed);
     if (i >= end) {
       // There are no more iterations to run.
       break;