[OPTIM] task: don't scan the run queue if we know it's empty

It happens quite often in fact, so let's save those precious cycles.

diff --git a/src/task.c b/src/task.c
index 9b21fd9df7e83fb46af8bc84372e8cbb98df2afc..a054150d25663891bf1af404e26cef8934a46f35 100644 (file)
--- a/src/task.c
+++ b/src/task.c
@@ -196,6 +196,10 @@ void process_runnable_tasks(int *next)
        run_queue_cur = run_queue; /* keep a copy for reporting */
        nb_tasks_cur = nb_tasks;
        max_processed = run_queue;
+
+       if (!run_queue)
+               return;
+
        if (max_processed > 200)
                max_processed = 200;