Fixes #4661 composer rendering slow with large file diffs

Author: d13

CHANGELOG.md

@@ -11,6 +11,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 - Fixes Git diff of a renamed file is shown as a new file ([#4246](https://github.com/gitkraken/vscode-gitlens/issues/4246))
 - Fixes typos ([#4345](https://github.com/gitkraken/vscode-gitlens/issues/4345) — thanks to [PR #4346](https://github.com/gitkraken/vscode-gitlens/pull/4346) by Noritaka Kobayashi ([@noritaka1166](https://github.com/noritaka1166)))
 - Fixes issue where the _Commit Graph_ hover would not hide when going from the hover to the graph background (not another row)
+- Fixes _Commit Composer_ rendering performance when working changes contain large file diffs ([#4661](https://github.com/gitkraken/vscode-gitlens/issues/4661))
 
 ## [17.5.1] - 2025-09-24
 

src/webviews/apps/plus/composer/components/diff/diff-file.ts

@@ -123,7 +123,9 @@ export class GlDiffFile extends LitElement {
 			.join('\n');
 
 		this.diffText = diffLines.trim();
-		const parsedDiff = parseDiff(this.diffText);
+		const parsedDiff = parseDiff(this.diffText, {
+			diffMaxChanges: 10000,
+		});
 		this.parsedDiff = parsedDiff;
 		const lineCount = this.diffFile?.blocks.reduce((p, c) => p + 1 + c.lines.length, 0) ?? -1;
 		this.style.setProperty('--d2h-intrinsic-line-count', lineCount > -1 ? `${lineCount}` : '50');