diff --git a/Grbl_Esp32/grbl.h b/Grbl_Esp32/grbl.h
index d1c46d66..1d23575c 100644
--- a/Grbl_Esp32/grbl.h
+++ b/Grbl_Esp32/grbl.h
@@ -20,7 +20,7 @@
 
 // Grbl versioning system
 #define GRBL_VERSION "1.1f"
-#define GRBL_VERSION_BUILD "20200218"
+#define GRBL_VERSION_BUILD "20200219"
 
 //#include <sdkconfig.h>
 #include <Arduino.h>
diff --git a/Grbl_Esp32/spindle_control.cpp b/Grbl_Esp32/spindle_control.cpp
index c350edb7..0ad8f1d8 100644
--- a/Grbl_Esp32/spindle_control.cpp
+++ b/Grbl_Esp32/spindle_control.cpp
@@ -205,8 +205,14 @@ void spindle_sync(uint8_t state, float rpm)
 
 void grbl_analogWrite(uint8_t chan, uint32_t duty)
 {
-	if (ledcRead(chan) != duty) // reduce unnecessary calls to ledcWrite()
+	// Remember the old duty cycle in memory instead of reading
+	// it from the I/O peripheral because I/O reads are quite
+	// a bit slower than memory reads.
+	static uint32_t old_duty = 0;
+
+	if (old_duty != duty) // reduce unnecessary calls to ledcWrite()
 	{		
+		old_duty = duty;
 		ledcWrite(chan, duty);
 	}
 }