diff --git a/hscript/Optimizer.hx b/hscript/Optimizer.hx
index c4ee4b2..2614045 100644
--- a/hscript/Optimizer.hx
+++ b/hscript/Optimizer.hx
@@ -10,11 +10,10 @@ class Optimizer {
 		if(s == null)
 			return null;
 
-		#if hscriptPos
-		var e = s.e;
-		#else
-		var e = s;
-		#end
+		var e = Tools.expr(s);
+
+		// TODO: Convert EBinOp(+, a, EUnop(-, b)) to EBinOp(-, a, b) aka (a - b)
+
 		switch(e) {
 			// Parse all expressions and recreate the AST
 			case EBlock(exprs):
@@ -22,7 +21,34 @@ class Optimizer {
 					if(Tools.expr(v).match(EBlock([]))) return false; // Remove empty blocks
 					return true;
 				});
-				return mk(EBlock(exprs), s);
+
+				var newExprs = [];
+				for(e in exprs) {
+					switch(Tools.expr(e)) {
+						case EBlock(iex):
+							var declares = false;
+							for(ie in iex) {
+								declares = switch(Tools.expr(ie)) {
+									case EVar(_): true;// has a declaration
+									case EFunction(_): true;// has a declaration
+									default: declares;
+								}
+								if(declares) break;
+							}
+							if(!declares) {
+								for(ex in iex)
+									newExprs.push(ex);
+							} else {
+								newExprs.push(e);
+							}
+						case EReturn(_): // remove stuff that are after a return
+							newExprs.push(e);
+							break;
+						default:
+							newExprs.push(e);
+					}
+				}
+				return mk(EBlock(newExprs), s);
 
 			case EIf(econd, e1, e2):
 				var econd = optimize(econd);
@@ -41,6 +67,24 @@ class Optimizer {
 					}
 				}
 				return mk(EIf(econd, e1, e2), s);
+
+			case ETernary(econd, e1, e2):
+				var econd = optimize(econd);
+				var e1 = optimize(e1);
+				var e2 = optimize(e2);
+				if(isConstant(econd)) {
+					var econd = getConstant(econd);
+					if(econd == true) {
+						if(e1 == null)
+							return mk(EBlock([]), s);
+						return mk(EParent(e1), s);
+					} else {
+						if(e2 == null)
+							return mk(EBlock([]), s);
+						return mk(EParent(e2), s);
+					}
+				}
+				return mk(ETernary(econd, e1, e2), s);
 			case EWhile(econd, e):
 				var econd = optimize(econd);
 				var e = optimize(e);
@@ -105,7 +149,16 @@ class Optimizer {
 
 			case EParent(e):
 				e = optimize(e);
-				return mk(EParent(e), s);
+				//return mk(EParent(e), s);
+				return mk(Tools.expr(e), s);
+
+			case ECheckType(e, t):
+				e = optimize(e);
+				return mk(ECheckType(e, t), s);
+
+			case EMeta(name, args, e):
+				e = optimize(e);
+				return mk(EMeta(name, args, e), s);
 
 			case ENew(cl, args):
 				args = args.map((v) -> optimize(v));
@@ -117,6 +170,13 @@ class Optimizer {
 				});
 				return mk(EObject(fl), s);
 
+			case EImport(c, n):
+				return mk(EImport(c, n), s);
+
+			case EClass(name, fields, extend, interfaces): // Possible code not working
+				fields = fields.map((v) -> optimize(v));
+				return mk(EClass(name, fields, extend, interfaces), s);
+
 			case EFunction(args, e, name, ret, isPublic, isStatic, isOverride):
 				args.map((v) -> {
 					v.name = v.name;
@@ -132,6 +192,40 @@ class Optimizer {
 					v.expr = optimize(v.expr);
 				});
 				def = optimize(def);
+
+				if(isConstant(e)) {
+					var econd = getConstant(e);
+
+					for(c in cases) {
+						for(v in c.values) {
+							if(isConstant(v)) {
+								var value = getConstant(v);
+								if(value == econd)
+									return mk(Tools.expr(c.expr), s);
+							}
+						}
+					}
+
+					var isAllCasesConstant = true;
+					for(c in cases) {
+						for(v in c.values) {
+							if(!isConstant(v)) {
+								isAllCasesConstant = false;
+								break;
+							}
+						}
+					}
+					if(isAllCasesConstant) {
+						#if debug
+						//trace("Didnt find any cases that match");
+						#end
+						if(def != null)
+							return mk(Tools.expr(def), s);
+						else
+							return mk(EBlock([]), s);
+					}
+				}
+
 				return mk(ESwitch(e, cases, def), s);
 
 			case EArrayDecl(arr, wantedType):
diff --git a/hscript/Parser.hx b/hscript/Parser.hx
index b058ca5..58f2429 100644
--- a/hscript/Parser.hx
+++ b/hscript/Parser.hx
@@ -44,7 +44,7 @@ enum Token {
 }
 
 class Parser {
-	public static var optimize = true;
+	public static var optimize = #if NO_HSCRIPT_OPTIMIZE false #else true #end;
 
 	// config / variables
 	public var line : Int;
@@ -474,7 +474,7 @@ class Parser {
 			if( opPriority.get(op) < 0 )
 				return makeUnop(op,parseExpr());
 			return unexpected(tk);
-		case TBkOpen:
+		case TBkOpen: // [
 			var a = new Array();
 			tk = token();
 			while( tk != TBkClose && (!resumeErrors || tk != TEof) ) {
@@ -487,7 +487,7 @@ class Parser {
 				if( tk == TComma )
 					tk = token();
 			}
-			if( a.length == 1 && a[0] != null ) // What is this for???
+			if( a.length == 1 && a[0] != null ) // Checks if its a for comprehension
 				switch( expr(a[0]) ) {
 					case EFor(_), EForKeyValue(_), EWhile(_), EDoWhile(_):
 						var tmp = "__a_" + (uid++);
diff --git a/hscript/Printer.hx b/hscript/Printer.hx
index 3db0b0f..0e6cf1f 100644
--- a/hscript/Printer.hx
+++ b/hscript/Printer.hx
@@ -113,7 +113,7 @@ class Printer {
 			add("??NULL??");
 			return;
 		}
-		switch( #if hscriptPos e.e #else e #end ) {
+		switch( Tools.expr(e) ) {
 		case EImport(c, n):
 			add("import " + c);
 			if(n != null)
@@ -127,6 +127,7 @@ class Printer {
 			}
 			add(' {\n');
 			tabs += "\t";
+			// TODO: Print fields
 			//for(field in fields) {
 			//	expr(field);
 			//}
@@ -162,15 +163,43 @@ class Printer {
 					add(";\n");
 				}
 				tabs = tabs.substr(1);
+				add(tabs);
 				add("}");
 			}
 		case EField(e, f, s):
 			expr(e);
 			add((s == true ? "?." : ".") + f);
 		case EBinop(op, e1, e2):
-			expr(e1);
+			var shouldParen = false;
+			var op1 = switch(Tools.expr(e1)) {
+				case EBinop(op, _, _): op;
+				case EConst(_): "_";
+				case EIdent(_): "_";
+				default: null;
+			}
+			var op2 = switch(Tools.expr(e2)) {
+				case EBinop(op, _, _): op;
+				case EConst(_): "_";
+				case EIdent(_): "_";
+				default: null;
+			}
+			var paran = Tools.checkOpPrecedence(op, op1, op2);
+
+			if(paran == 0 || paran == 2) {
+				add("(");
+				expr(e1);
+				add(")");
+			} else {
+				expr(e1);
+			}
 			add(" " + op + " ");
-			expr(e2);
+			if(paran == 1 || paran == 2) {
+				add("(");
+				expr(e2);
+				add(")");
+			} else {
+				expr(e2);
+			}
 		case EUnop(op, pre, e):
 			if( pre ) {
 				add(op);
@@ -182,13 +211,13 @@ class Printer {
 		case ECall(e, args):
 			if( e == null )
 				expr(e);
-			else switch( #if hscriptPos e.e #else e #end ) {
-			case EField(_), EIdent(_), EConst(_):
-				expr(e);
-			default:
-				add("(");
-				expr(e);
-				add(")");
+			else switch( Tools.expr(e) ) {
+				case EField(_), EIdent(_), EConst(_):
+					expr(e);
+				default:
+					add("(");
+					expr(e);
+					add(")");
 			}
 			add("(");
 			var first = true;
@@ -290,13 +319,15 @@ class Printer {
 			} else {
 				tabs += "\t";
 				add("{\n");
-				for( f in fl ) {
+				for( i=>f in fl ) {
 					add(tabs);
 					add(f.name+" : ");
 					expr(f.e);
-					add(",\n");
+					if( i != fl.length - 1 ) add(",");
+					add("\n");
 				}
 				tabs = tabs.substr(1);
+				add(tabs);
 				add("}");
 			}
 		case ETernary(c,e1,e2):
@@ -308,8 +339,10 @@ class Printer {
 		case ESwitch(e, cases, def):
 			add("switch( ");
 			expr(e);
-			add(") {");
+			add(" ) {\n");
+			tabs += "\t";
 			for( c in cases ) {
+				add(tabs);
 				add("case ");
 				var first = true;
 				for( v in c.values ) {
@@ -321,10 +354,13 @@ class Printer {
 				add(";\n");
 			}
 			if( def != null ) {
+				add(tabs);
 				add("default: ");
 				expr(def);
 				add(";\n");
 			}
+			tabs = tabs.substr(1);
+			add(tabs);
 			add("}");
 		case EMeta(name, args, e):
 			add("@");
diff --git a/hscript/Tools.hx b/hscript/Tools.hx
index 6855773..504a80b 100644
--- a/hscript/Tools.hx
+++ b/hscript/Tools.hx
@@ -122,4 +122,76 @@ class Tools {
 		}
 	}
 
+	static var priorities = [
+		["%"],
+		["*", "/"],
+		["+", "-"],
+		["<<", ">>", ">>>"],
+		["|", "&", "^"],
+		["==", "!=", ">", "<", ">=", "<="],
+		["..."],
+		["&&"],
+		["||"],
+		["=","+=","-=","*=","/=","%=","<<=",">>=",">>>=","|=","&=","^=","=>","??"+"="],
+		["->", "??"],
+		["is"]
+	];
+	public static function checkOpPrecedence(mainOp:String, leftOp:String, rightOp:String):Int {
+		var mainOpGroup = getOpGroup(mainOp);
+		var leftOpGroup = getOpGroup(leftOp);
+		var rightOpGroup = getOpGroup(rightOp);
+
+		var leftParam = false;
+		var rightParam = false;
+
+		if(leftOpGroup > mainOpGroup && leftOpGroup != -1) leftParam = true;
+		if(rightOpGroup > mainOpGroup && rightOpGroup != -1) rightParam = true;
+
+		if(!leftParam && !rightParam) {
+			var mainOpIndex = getOpIndex(mainOp);
+			var leftOpIndex = getOpIndex(leftOp);
+			var rightOpIndex = getOpIndex(rightOp);
+
+			if(mainOpGroup == rightOpGroup) {
+				if(rightOpIndex < mainOpIndex) rightParam = true;
+			}
+			if(leftOpGroup == mainOpGroup) {
+				if(leftOpIndex < mainOpIndex) leftParam = true;
+			}
+		}
+
+		// Convert to index
+		if(!leftParam && !rightParam) return -1;
+		if(leftParam && rightParam) return 2;
+		if(leftParam) return 0;
+		if(rightParam) return 1;
+		return -1;
+	}
+
+	public static function getOpIndex(op:String):Int {
+		if(op == "_") return -1;
+		var i = 0;
+		for(p in priorities) {
+			for(pp in p) {
+				if(op == pp)
+					return i;
+				i++;
+			}
+		}
+		return -1;
+	}
+
+	public static function getOpGroup(op:String):Int {
+		if(op == "_") return -1;
+		var i = 0;
+		for(p in priorities) {
+			for(pp in p) {
+				if(op == pp)
+					return i;
+			}
+			i++;
+		}
+		return -1;
+	}
+
 }
\ No newline at end of file
diff --git a/tests/mac.hxml b/tests/mac.hxml
index fc3b7ef..3ec74d6 100644
--- a/tests/mac.hxml
+++ b/tests/mac.hxml
@@ -13,12 +13,19 @@
 --define HXCPP_CHECK_POINTER
 --define HXCPP_STACK_LINE
 --define HXCPP_DEBUG_LINK
+# -D HXCPP_M64
+# -D HXCPP_ARM64
 --dce no
 
 # File Specific Defines
 --define macos
 --define mac
 
+--macro keep('IntIterator')
+# --macro hscript.macros.UsingHandler.init()
+# --macro hscript.macros.ClassExtendMacro.init()
+
+
 # Copying the assets from source code to bin folder
 --cmd rm -rf bin/cpp/assets
 --cmd cp -r assets bin/cpp/assets
diff --git a/tests/src/Main.hx b/tests/src/Main.hx
index c4276bf..3a7acd4 100644
--- a/tests/src/Main.hx
+++ b/tests/src/Main.hx
@@ -38,6 +38,7 @@ class Main {
 		runTest("SwitchStatement", new SwitchCase());
 		// TODO: UnicodeCase.hx?
 		// TODO: UnicodeStringCase.hx?
+		runTest("Final", new FinalCase());
 		Util.printTestResults();
 		#end
 	}
diff --git a/tests/src/benchmark/TestBenchmark.hx b/tests/src/benchmark/TestBenchmark.hx
index 76433c5..00d9e93 100644
--- a/tests/src/benchmark/TestBenchmark.hx
+++ b/tests/src/benchmark/TestBenchmark.hx
@@ -6,20 +6,46 @@ class TestBenchmark extends Benchmark {
 		super("Test", 10000);
 	}
 
-	var hscript = "var a:Array<Float> = []; for (i in 0...1000) a.push(i * 2 + 1 / 6); if(true == true) a.push(1);";
+	//var hscript = "var a:Array<Float> = []; for (i in 0...1000) a.push(i * 2 + 1 / 6); if(true == true) a.push(1);";
+	var hscript = "
+	var a:Array<Float> = [];
+	for(i in 0...1000)
+		switch(5) {
+			case true: a.push(1);
+			default: a.push(2);
+		}
+	if(('a' == 'a') ? true : false) a.push(1);
+	if(true == true)
+		a.push(1);";
+
+	function test() {
+		return 5;
+	}
+
+	var aaa = null;
 
 	public override function reset() {
 		super.reset();
-		a = [];
-		if(interp != null)
-			interp.variables.remove("a");
+		aaa = {
+			test: test
+		};
 		if(expr == null)
 			cacheExpr(hscript);
+		interp.variables.remove("a");
+		//interp.variables.set("aaa", aaa);
+		interp.variables.set("test", test);
 	}
 
-    public var a:Array<Float> = [];
 	public override function haxeBenchmark() {
-		for (i in 0...1000) a.push(i * 2 + 1 / 6);
+		var a:Array<Float> = [];
+		//for (i in 0...1000) a.push(i * 2 + 1 / 6);
+		//for (i in 0...1000) a.push(i / 2 + 3 / 6);
+		for(i in 0...1000)
+			switch(5) {
+				case 0: a.push(1);
+				default: a.push(2);
+			}
+		if(('a' == 'a') ? true : false) a.push(1);
 		if(true == true) a.push(1);
 	}
 
diff --git a/tests/src/tests/FinalCase.hx b/tests/src/tests/FinalCase.hx
new file mode 100644
index 0000000..9355b66
--- /dev/null
+++ b/tests/src/tests/FinalCase.hx
@@ -0,0 +1,47 @@
+package tests;
+
+class FinalCase extends TestCase {
+	override function setup() {
+		super.setup();
+	}
+
+	override function getNewInterp() {
+		var interp = super.getNewInterp();
+		interp.variables.set("Std", Std);
+		interp.variables.set("String", String);
+		interp.variables.set("Bool", Bool);
+		interp.variables.set("Float", Float);
+		interp.variables.set("Array", Array);
+		interp.variables.set("Int", Int);
+		interp.variables.set("IntIterator", IntIterator);
+		return interp;
+	}
+
+	override function run() {
+        headerCode = "var i = 5; var x = 10;";
+
+        var i = 5; var x = 10;
+
+		hscript.Parser.optimize = false;
+
+		assertDisplay("(i - x) * 30 + 90", ((i-x) * 30) + 90);
+		assertDisplay("i - x * 30 + 90", i-x * 30 + 90);
+
+		// Test operator precedence
+		assertDisplay("i / x * 30 + 90", i / x * 30 + 90);
+		assertDisplay("i / (x * 30) + 90", i / (x * 30) + 90);
+
+		assertDisplay("x * 30 / i + 90", x * 30 / i + 90);
+		//assertEq("(x * 30) / i + 90", x * 30 / i + 90);
+	}
+
+	function assertDisplay(script:String, expected:Dynamic) {
+		var _script = script;
+		script = '"${script}";\n' + script;
+		assertEq(script, expected, _script);
+	}
+
+	override function teardown() {
+		super.teardown();
+	}
+}
\ No newline at end of file