From e6fb89c8e842fdd63ab627573a084c171b7afd94 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luk=C3=A1=C5=A1=20Zapletal?= <lukas@zapletalovi.com>
Date: Wed, 18 Dec 2024 10:51:43 +0100
Subject: [PATCH] Optimize allocation in AppendRecordAttrsToAttrs (#18)

---
 attributes.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/attributes.go b/attributes.go
index 62d907a..ceb357b 100644
--- a/attributes.go
+++ b/attributes.go
@@ -17,7 +17,8 @@ import (
 type ReplaceAttrFn = func(groups []string, a slog.Attr) slog.Attr
 
 func AppendRecordAttrsToAttrs(attrs []slog.Attr, groups []string, record *slog.Record) []slog.Attr {
-	output := slices.Clone(attrs)
+	output := make([]slog.Attr, 0, len(attrs)+record.NumAttrs())
+	output = append(output, attrs...)
 
 	slices.Reverse(groups)
 	record.Attrs(func(attr slog.Attr) bool {