optimize: dedup consts

src/bytecode.rs

@@ -8,10 +8,10 @@ type Slice<T> = Box<[T]>;
 
 pub type OpCodes = Slice<OpCode>;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy)]
 pub enum OpCode {
     /// load a constant onto stack
-    Const { value: Const },
+    Const { idx: usize },
     /// load a dynamic var onto stack
     LookUp { sym: usize },
     /// load a thunk lazily onto stack
@@ -114,4 +114,5 @@ pub struct Program {
     pub funcs: Slice<Func>,
     pub symbols: Vec<EcoString>,
     pub symmap: HashMap<EcoString, usize>,
+    pub consts: Box<[Const]>
 }