From: Toni Wilen <twilen@winuae.net>
Date: Sun, 15 Sep 2024 15:07:14 +0000 (+0300)
Subject: Reduce amount of read_processor_time() calls.
X-Git-Tag: 5310~13
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=c10655ea60ecd6964910bca90a24ce405df4a3b0;p=francis%2Fwinuae.git

Reduce amount of read_processor_time() calls.
---

diff --git a/custom.cpp b/custom.cpp
index 8623228b..a8a60c36 100644
--- a/custom.cpp
+++ b/custom.cpp
@@ -12196,8 +12196,9 @@ static bool framewait(void)
 				}
 			}
 		}
-		idletime += read_processor_time() - start;
-		curr_time = read_processor_time();
+		evt_t tnow = read_processor_time();
+		idletime += tnow - start;
+		curr_time = tnow;
 		vsyncmintime = curr_time;
 		vsyncmaxtime = vsyncwaittime = curr_time + vstb;
 		if (frame_rendered) {
diff --git a/events.cpp b/events.cpp
index 92bbc8f8..4a22f987 100644
--- a/events.cpp
+++ b/events.cpp
@@ -25,6 +25,7 @@ static const int pissoff_nojit_value = 256 * CYCLE_UNIT;
 
 evt_t event_cycles, nextevent, currcycle;
 int is_syncline;
+static int syncline_cnt;
 frame_time_t is_syncline_end;
 int cycles_to_next_event;
 int max_cycles_to_next_event;
@@ -266,6 +267,19 @@ void do_cycles_slow(int cycles_to_add)
 #endif
 #endif
 
+	if (syncline_cnt > 0) {
+		syncline_cnt--;
+		return;
+	}
+	if (is_syncline) {
+		// runs CPU emulation with chipset stopped
+		// when there is free time to do so
+		if (event_check_vsync()) {
+			syncline_cnt = 16;
+			return;
+		}
+	}
+
 	if (!currprefs.cpu_thread) {
 		if ((pissoff -= cycles_to_add) >= 0)
 			return;