From e64dad4e9f95f7dae8e98b0371f24bc7ee3066f7 Mon Sep 17 00:00:00 2001
From: Stephen Chung <schungx@live.com>
Date: Tue, 18 May 2021 12:40:40 +0800
Subject: [PATCH] Optimize scope.

---
 src/ast.rs   | 2 +-
 src/scope.rs | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/ast.rs b/src/ast.rs
index 21841502..aa1a1a4a 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -2128,7 +2128,7 @@ mod tests {
                 96
             }
         );
-        assert_eq!(size_of::<Scope>(), 288);
+        assert_eq!(size_of::<Scope>(), 160);
         assert_eq!(size_of::<LexError>(), 56);
         assert_eq!(
             size_of::<ParseError>(),
diff --git a/src/scope.rs b/src/scope.rs
index ed0bacd1..3c34cb09 100644
--- a/src/scope.rs
+++ b/src/scope.rs
@@ -7,7 +7,7 @@ use std::prelude::v1::*;
 use std::{borrow::Cow, iter::Extend};
 
 /// Keep a number of entries inline (since [`Dynamic`] is usually small enough).
-const SCOPE_SIZE: usize = 16;
+const SCOPE_SIZE: usize = 8;
 
 /// Type containing information about the current scope.
 /// Useful for keeping state between [`Engine`][crate::Engine] evaluation runs.
@@ -98,7 +98,7 @@ impl<'a> Scope<'a> {
     pub fn new() -> Self {
         Self {
             values: Default::default(),
-            names: Vec::with_capacity(SCOPE_SIZE),
+            names: Default::default(),
         }
     }
     /// Empty the [`Scope`].