Improved performance of walking.

Switches to manual walking when close to target.

_creeps.js

@@ -1,3 +1,5 @@
+const { round } = require("lodash");
+
 module.exports = {
 	// Gets called when recompiling and when Restart command is called.
 	start: function () {
@@ -11,7 +13,10 @@ module.exports = {
 	update: function () {
 		for (const creep_name in Memory.creeps) {
 			const creep = Game.creeps[creep_name];
-			if (creep == undefined) delete Memory.creeps[creep_name];
+			if (creep == undefined) {
+				delete Memory.creeps[creep_name];
+				return;
+			}
 			switch (creep.memory.role) {
 				case ROLE_HARVESTER:
 					if (creep.memory.recharge) creep.harvestSource();