Less memory allocations at runtime

crates/forth/src/ops.rs

@@ -1,10 +1,12 @@
+use std::sync::Arc;
+
 use super::types::SourceSpan;
 
 #[derive(Clone, Debug, PartialEq)]
 pub enum Op {
     PushInt(i64, Option<SourceSpan>),
     PushFloat(f64, Option<SourceSpan>),
-    PushStr(String, Option<SourceSpan>),
+    PushStr(Arc<str>, Option<SourceSpan>),
     Dup,
     Dupn,
     Drop,
@@ -71,7 +73,7 @@ pub enum Op {
     Ftom,
     SetTempo,
     Every,
-    Quotation(Vec<Op>, Option<SourceSpan>),
+    Quotation(Arc<[Op]>, Option<SourceSpan>),
     When,
     Unless,
     Adsr,