From b90f4a46f55fbbcc001988ea4f8817295ccd0c04 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Johannes=20M=C3=BCller?= <straightshoota@gmail.com>
Date: Thu, 27 Nov 2025 17:46:01 +0100
Subject: [PATCH] Resize execution context for spec with `CRYSTAL_WORKERS`

---
 src/spec.cr | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/spec.cr b/src/spec.cr
index adb806b4c841..fe9dd40d98ed 100644
--- a/src/spec.cr
+++ b/src/spec.cr
@@ -130,6 +130,12 @@ module Spec
         Process.on_terminate { abort! }
       {% end %}
 
+      {% if flag?(:execution_context) %}
+        if count = ENV["CRYSTAL_WORKERS"]?.try(&.to_i?)
+          Fiber::ExecutionContext.current.resize(count)
+        end
+      {% end %}
+
       run
     end
   end