From c4dff990d977f52ce4204a0d10200e2cad30a56a Mon Sep 17 00:00:00 2001
From: Jaden Weiss <jadr2ddude@gmail.com>
Date: Thu, 17 Oct 2019 17:48:43 -0400
Subject: [PATCH] skip calling ticks when the sleep queue is empty

---
 src/runtime/scheduler.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/runtime/scheduler.go b/src/runtime/scheduler.go
index d65cd7e1..7dc2b790 100644
--- a/src/runtime/scheduler.go
+++ b/src/runtime/scheduler.go
@@ -226,10 +226,13 @@ func addSleepTask(t *task, duration int64) {
 // Run the scheduler until all tasks have finished.
 func scheduler() {
 	// Main scheduler loop.
+	var now timeUnit
 	for {
 		scheduleLog("")
 		scheduleLog("  schedule")
-		now := ticks()
+		if sleepQueue != nil {
+			now = ticks()
+		}
 
 		// Add tasks that are done sleeping to the end of the runqueue so they
 		// will be executed soon.