From 7d64eb9c1cfa0f96c62840c75f3a425f4507e6c7 Mon Sep 17 00:00:00 2001
From: Boshen <1430279+Boshen@users.noreply.github.com>
Date: Sat, 19 Jul 2025 06:34:01 +0000
Subject: [PATCH] perf(codegen): replace loop + push with `std::iter::repeat`
 (#12398)

---
 crates/oxc_codegen/src/sourcemap_builder.rs | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/crates/oxc_codegen/src/sourcemap_builder.rs b/crates/oxc_codegen/src/sourcemap_builder.rs
index f685f5db59638..d2497e334001c 100644
--- a/crates/oxc_codegen/src/sourcemap_builder.rs
+++ b/crates/oxc_codegen/src/sourcemap_builder.rs
@@ -360,9 +360,7 @@ impl<'a> SourcemapBuilder<'a> {
                         for (chunk_byte_offset, ch) in remaining.char_indices() {
                             #[expect(clippy::cast_possible_truncation)]
                             let mut chunk_byte_offset = chunk_byte_offset as u32;
-                            for _ in 0..ch.len_utf8() {
-                                columns.push(column);
-                            }
+                            columns.extend(std::iter::repeat_n(column, ch.len_utf8()));
 
                             match ch {
                                 '\r' => {