From ba62c665aa2d99db3e5a3cd7c1622996475bb559 Mon Sep 17 00:00:00 2001
From: "Alexander A. Klimov" <alexander.klimov@icinga.com>
Date: Wed, 9 Nov 2022 12:18:21 +0100
Subject: [PATCH] WorkQueue#ParallelFor(): allocate lambda once per thread, not
 once per item

---
 lib/base/workqueue.hpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/lib/base/workqueue.hpp b/lib/base/workqueue.hpp
index 9c8a6b8f9..2cfec6471 100644
--- a/lib/base/workqueue.hpp
+++ b/lib/base/workqueue.hpp
@@ -89,10 +89,13 @@ public:
 				count++;
 
 			EnqueueUnlocked(lock, [&items, func, offset, count, this]() {
-				for (SizeType j = offset; j < offset + count; j++) {
-					RunTaskFunction([&func, &items, j]() {
-						func(items[j]);
-					});
+				SizeType j;
+				TaskFunction f = [&func, &items, &j]() {
+					func(items[j]);
+				};
+
+				for (j = offset; j < offset + count; j++) {
+					RunTaskFunction(f);
 				}
 			});