daemon/worker: less frequent decommit

daemon/worker.c

@@ -142,8 +142,8 @@ static void qr_task_free(uv_handle_t *handle)
 		mp_delete(mp_context);
 #if defined(__GLIBC__) && defined(_GNU_SOURCE)
 		/* Decommit memory every once in a while */
-		static int mp_delete_count = 0;
-		if (++mp_delete_count == 2 * worker->pools.cap) {
+		static size_t mp_delete_count = 0;
+		if (++mp_delete_count == 100 * MP_FREELIST_SIZE) {
 			malloc_trim(0);
 			mp_delete_count = 0;
 		}