From fb847bd0ba57029d83982dae4371dca53425e4ec Mon Sep 17 00:00:00 2001
From: Boshen <1430279+Boshen@users.noreply.github.com>
Date: Mon, 26 Aug 2024 01:37:48 +0000
Subject: [PATCH] perf(codegen): slightly faster `print_list` (#5192)

---
 crates/oxc_codegen/src/lib.rs | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/crates/oxc_codegen/src/lib.rs b/crates/oxc_codegen/src/lib.rs
index e5254f55f..ff47797a5 100644
--- a/crates/oxc_codegen/src/lib.rs
+++ b/crates/oxc_codegen/src/lib.rs
@@ -412,11 +412,12 @@ impl<'a> Codegen<'a> {
     }
 
     fn print_list<T: Gen>(&mut self, items: &[T], ctx: Context) {
-        for (index, item) in items.iter().enumerate() {
-            if index != 0 {
-                self.print_comma();
-                self.print_soft_space();
-            }
+        let mut iter = items.iter();
+        let Some(item) = iter.next() else { return };
+        item.gen(self, ctx);
+        for item in iter {
+            self.print_comma();
+            self.print_soft_space();
             item.gen(self, ctx);
         }
     }