From 8923472c238f169ef9e6164ffb199ab981ecdcd1 Mon Sep 17 00:00:00 2001
From: Nikita Smith <git.nikita.smith@gmail.com>
Date: Wed, 2 Sep 2026 21:22:10 -0700
Subject: [PATCH] radlink: fast path for single task runs

---
 src/linker/thread_pool/thread_pool.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/linker/thread_pool/thread_pool.c b/src/linker/thread_pool/thread_pool.c
index 3dc2c146..d91efc44 100644
--- a/src/linker/thread_pool/thread_pool.c
+++ b/src/linker/thread_pool/thread_pool.c
@@ -182,6 +182,13 @@ tp_temp_end(TP_Temp temp)
 internal void
 tp_for_parallel(TP_Context *pool, TP_Arena *task_arena, U64 task_count, TP_TaskFunc *task_func, void *task_data)
 {
+  // fast path for single tasks to bypass syncs
+  if (task_count == 1) {
+    Arena *arena = task_arena ? task_arena->v[0] : 0;
+    task_func(arena, 0, 0, task_data, pool);
+    return;
+  }
+
   if (task_count) {
     // init run
     pool->task_arena = task_arena;