From 7330fe1b2d64cf252b1ae446c241896c9892c050 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Wed, 7 Jan 2026 18:35:18 +0000
Subject: [PATCH] perf: Use XFlush instead of XSync in drw_map

Replacing XSync with XFlush reduces the blocking round-trip to the X server,
improving performance during frequent drawing operations (e.g., bar updates).
XFlush sends the requests asynchronously without waiting for a reply, which
is sufficient for drawing operations where the client doesn't need to read
back data immediately.
---
 drw.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drw.c b/drw.c
index 7e99a386..190f8017 100644
--- a/drw.c
+++ b/drw.c
@@ -494,7 +494,8 @@ void drw_map(Drw *drw, Window win, int x, int y, unsigned int w,
     }
 
     XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);
-    XSync(drw->dpy, False);
+    /* Optimized: Use XFlush instead of XSync to avoid blocking round-trip */
+    XFlush(drw->dpy);
 }
 
 unsigned int drw_fontset_getwidth(Drw *drw, const char *text) {