From a0cbc5822e8ac410542aafb129f6f72eb3fcbe3a Mon Sep 17 00:00:00 2001
From: daboe01 <daboe01@googlemail.com>
Date: Mon, 21 Dec 2015 20:17:51 +0100
Subject: [PATCH] speedup for chrome

---
 AppKit/CPTextView/CPTextView.j | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/AppKit/CPTextView/CPTextView.j b/AppKit/CPTextView/CPTextView.j
index 83b93a30a..9e99659a7 100644
--- a/AppKit/CPTextView/CPTextView.j
+++ b/AppKit/CPTextView/CPTextView.j
@@ -619,6 +619,16 @@ var kDelegateRespondsTo_textShouldBeginEditing
     [_caret setVisibility:flag stop:NO];
 }
 
+// remove unnecessary call to CGContextClearRect from CPView implementation
+- (void)displayRectIgnoringOpacity:(CGRect)aRect inContext:(CPGraphicsContext)aGraphicsContext
+{    if ([self isHidden])
+       return;
+
+   [self lockFocus];
+
+   [self drawRect:aRect];
+   [self unlockFocus];
+}
 
 - (void)drawRect:(CGRect)aRect
 {