From ba5d272ae111b3da765c842bfd100013833c1eac Mon Sep 17 00:00:00 2001
From: Alexander Akait <4567934+alexander-akait@users.noreply.github.com>
Date: Thu, 20 Oct 2022 05:54:22 +0300
Subject: [PATCH] perf(html/parser): Improve performance a bit (#6213)

---
 crates/swc_html_parser/src/lexer/mod.rs                |  6 +-----
 .../src/parser/active_formatting_element_stack.rs      | 10 +++-------
 2 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/crates/swc_html_parser/src/lexer/mod.rs b/crates/swc_html_parser/src/lexer/mod.rs
index 5792fc6c831f..e8049b46458f 100644
--- a/crates/swc_html_parser/src/lexer/mod.rs
+++ b/crates/swc_html_parser/src/lexer/mod.rs
@@ -4146,11 +4146,7 @@ where
                             && !is_last_semicolon
                             && is_next_equals_sign_or_ascii_alphanumeric
                         {
-                            let old_temporary_buffer = self.temporary_buffer.clone();
-
-                            self.flush_code_points_consumed_as_character_reference(Some(
-                                old_temporary_buffer,
-                            ));
+                            self.flush_code_points_consumed_as_character_reference(None);
                             self.state = self.return_state.clone();
                         }
                         // Otherwise:
diff --git a/crates/swc_html_parser/src/parser/active_formatting_element_stack.rs b/crates/swc_html_parser/src/parser/active_formatting_element_stack.rs
index f51529a422d4..8383b7b336d3 100644
--- a/crates/swc_html_parser/src/parser/active_formatting_element_stack.rs
+++ b/crates/swc_html_parser/src/parser/active_formatting_element_stack.rs
@@ -54,22 +54,18 @@ impl ActiveFormattingElementStack {
                         continue;
                     }
 
-                    (node.clone(), token_and_info.clone())
+                    (node.clone(), token_and_info)
                 }
             };
 
             let attributes_in_element = match &token_and_info_in_element.token {
-                Token::StartTag { attributes, .. } | Token::EndTag { attributes, .. } => {
-                    attributes.clone()
-                }
+                Token::StartTag { attributes, .. } | Token::EndTag { attributes, .. } => attributes,
                 _ => {
                     unreachable!()
                 }
             };
             let attributes_in_new_element = match &new_element.1.token {
-                Token::StartTag { attributes, .. } | Token::EndTag { attributes, .. } => {
-                    attributes.clone()
-                }
+                Token::StartTag { attributes, .. } | Token::EndTag { attributes, .. } => attributes,
                 _ => {
                     unreachable!()
                 }