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diff --git a/MagickCore/thread-private.h b/MagickCore/thread-private.h
index f30b82fb985e6369849290d0c3cc1c7f56c0ce8d..7496eeb7f1eee251f81f83a1f69536df58e6dfc6 100644 (file)
--- a/MagickCore/thread-private.h
+++ b/MagickCore/thread-private.h
@@ -28,7 +28,7 @@ extern "C" {
 /*
   Single threaded unless workload justifies the threading overhead.
 */
-#define MinimumWorkLoad()  (32*GetMagickResourceLimit(ThreadResource))
+#define MinimumWorkLoad()  (16*GetMagickResourceLimit(ThreadResource))
 #define dynamic_number_threads(columns,rows,expression) \
   if (((((columns) > MinimumWorkLoad()) || \
       ((rows) > MinimumWorkLoad()))) && ((MagickSizeType) \