From dc62dd9d829b3860f31012e3dff4cc3fb3792a2c Mon Sep 17 00:00:00 2001
From: Dmytro Maluka <dmitrymaluka@gmail.com>
Date: Mon, 17 Jun 2024 12:59:32 +0200
Subject: [PATCH] autosave: don't save unmodified buffer (#3356)

Saving a buffer every time without even checking if it was modified
(i.e. even when the user is not editing the buffer) is wasteful,
especially if the autosave period is set to a short value.
---
 internal/buffer/save.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/internal/buffer/save.go b/internal/buffer/save.go
index fbafa6a8..efbf04f4 100644
--- a/internal/buffer/save.go
+++ b/internal/buffer/save.go
@@ -95,6 +95,11 @@ func (b *Buffer) Save() error {
 
 // AutoSave saves the buffer to its default path
 func (b *Buffer) AutoSave() error {
+	// Doing full b.Modified() check every time would be costly, due to the hash
+	// calculation. So use just isModified even if fastdirty is not set.
+	if !b.isModified {
+		return nil
+	}
 	return b.saveToFile(b.Path, false, true)
 }