Core: make cli 2x faster

Avoid using time every clock cycle when it is not needed.
cvut · Dec 23, 2024 · e3d2b62 · e3d2b62
1 parent 928557e
commit e3d2b62
Showing 1 changed file with 5 additions and 2 deletions.
diff --git 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) {