From e3d2b625e5cf9cfa820a1ab240ee8b5a34c657d0 Mon Sep 17 00:00:00 2001
From: Jakub Dupak <dev@jakubdupak.com>
Date: Mon, 23 Dec 2024 16:44:41 +0100
Subject: [PATCH] Core: make cli 2x faster

Avoid using time every clock cycle when it is not needed.
---
 src/machine/machine.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/machine/machine.cpp b/src/machine/machine.cpp
index 5ac9ea4c..f5f5f74b 100644
--- a/src/machine/machine.cpp
+++ b/src/machine/machine.cpp
@@ -5,6 +5,8 @@
 #include <QTime>
 #include <utility>
 
+LOG_CATEGORY("machine");
+
 using namespace machine;
 
 Machine::Machine(MachineConfig config, bool load_symtab, bool load_executable)
@@ -361,9 +363,10 @@ void Machine::step_internal(bool skip_break) {
     set_status(ST_BUSY);
     emit tick();
     try {
-        QTime start_time = QTime::currentTime();
+        // Avoid checking time (expensive) if we don't care about it.
+        QTime start_time = (time_chunk != 0) ? QTime::currentTime() : QTime();
         do {
-            cr->step(skip_break);
+                cr->step(skip_break);
         } while (time_chunk != 0 && stat == ST_BUSY && !skip_break
                  && start_time.msecsTo(QTime::currentTime()) < (int)time_chunk);
     } catch (SimulatorException &e) {