From 4c694c57f4d73b6ae33113869fcf997dc8e24343 Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <odigiman@gmail.com>
Date: Sat, 10 Aug 2019 17:49:31 +0100
Subject: [PATCH] DaylightSensor: Avoid triggering useless block updates if
 calculated power is unchanged

---
 src/block/DaylightSensor.php | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/block/DaylightSensor.php b/src/block/DaylightSensor.php
index 271aa8016..803ad5fe0 100644
--- a/src/block/DaylightSensor.php
+++ b/src/block/DaylightSensor.php
@@ -95,8 +95,11 @@ class DaylightSensor extends Transparent{
 	}
 
 	public function onScheduledUpdate() : void{
-		$this->power = $this->recalculatePower();
-		$this->pos->getWorld()->setBlock($this->pos, $this);
+		$newPower = $this->recalculatePower();
+		if($this->power !== $newPower){
+			$this->power = $newPower;
+			$this->pos->getWorld()->setBlock($this->pos, $this);
+		}
 		$this->pos->getWorld()->scheduleDelayedBlockUpdate($this->pos, 20);
 	}