From d7f7c1cb8b0a4c3788453697e1d66ae78ba7a974 Mon Sep 17 00:00:00 2001
From: usfbih8u <>
Date: Sun, 5 Jul 2026 23:41:15 +0200
Subject: [PATCH] buffer/search: only append to deltas when found increments in
 ReplaceRegex()

Reduce the amount of deltas to improve performance in large buffers, with only
a few matches.
---
 internal/buffer/search.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/internal/buffer/search.go b/internal/buffer/search.go
index 3f4f0dad3e..369232d84a 100644
--- a/internal/buffer/search.go
+++ b/internal/buffer/search.go
@@ -226,6 +226,7 @@ func (b *Buffer) ReplaceRegex(start, end Loc, search *regexp.Regexp, replace []b
 				deltas = append(deltas, Delta{newText, match[0], match[1]})
 			}
 		} else {
+			prevFound := found
 			newLine := search.ReplaceAllFunc(l, func(in []byte) []byte {
 				found++
 				var result []byte
@@ -237,7 +238,10 @@ func (b *Buffer) ReplaceRegex(start, end Loc, search *regexp.Regexp, replace []b
 				}
 				return result
 			})
-			deltas = append(deltas, Delta{newLine, Loc{0, i}, Loc{charCount, i}})
+
+			if prevFound < found {
+				deltas = append(deltas, Delta{newLine, Loc{0, i}, Loc{charCount, i}})
+			}
 		}
 	}