idrawbar: Don't expend effort drawing bar if it is occluded - dwm - dynamic window manager	Err	parazyd.org	70
hgit clone https://git.parazyd.org/dwm	URL:https://git.parazyd.org/dwm	parazyd.org	70
1Log	/git/dwm/log.gph	parazyd.org	70
1Files	/git/dwm/files.gph	parazyd.org	70
1Refs	/git/dwm/refs.gph	parazyd.org	70
1README	/git/dwm/file/README.gph	parazyd.org	70
1LICENSE	/git/dwm/file/LICENSE.gph	parazyd.org	70
i---	Err	parazyd.org	70
1commit 8657affa2a61e85ca8df76b62e43cb02897d1d80	/git/dwm/commit/8657affa2a61e85ca8df76b62e43cb02897d1d80.gph	parazyd.org	70
1parent a786211d6cb794fba0ea406d86002c7618998afc	/git/dwm/commit/a786211d6cb794fba0ea406d86002c7618998afc.gph	parazyd.org	70
hAuthor: Chris Down <chris@chrisdown.name>	URL:mailto:chris@chrisdown.name	parazyd.org	70
iDate:   Sat, 18 Dec 2021 16:58:23 +0000	Err	parazyd.org	70
i	Err	parazyd.org	70
idrawbar: Don't expend effort drawing bar if it is occluded	Err	parazyd.org	70
i	Err	parazyd.org	70
iI noticed that a non-trivial amount of dwm's work on my machine was from	Err	parazyd.org	70
idrw_text, which seemed weird, because I have the bar disabled and we	Err	parazyd.org	70
ionly use drw_text as part of bar drawing.	Err	parazyd.org	70
i	Err	parazyd.org	70
iLooking more closely, I realised that while we use m->showbar when	Err	parazyd.org	70
iupdating the monitor bar margins, but don't skip actually drawing the	Err	parazyd.org	70
ibar if it is hidden. This patch skips drawing it entirely if that is the	Err	parazyd.org	70
icase.	Err	parazyd.org	70
i	Err	parazyd.org	70
iOn my machine, this takes 10% of dwm's on-CPU time, primarily from	Err	parazyd.org	70
irestack() and focus().	Err	parazyd.org	70
i	Err	parazyd.org	70
iWhen the bar is toggled on again, the X server will generate an Expose	Err	parazyd.org	70
ievent, and we'll redraw the bar as normal as part of expose().	Err	parazyd.org	70
i	Err	parazyd.org	70
iDiffstat:	Err	parazyd.org	70
i  M dwm.c                               |       3 +++	Err	parazyd.org	70
i	Err	parazyd.org	70
i1 file changed, 3 insertions(+), 0 deletions(-)	Err	parazyd.org	70
i---	Err	parazyd.org	70
1diff --git a/dwm.c b/dwm.c	/git/dwm/file/dwm.c.gph	parazyd.org	70
i@@ -702,6 +702,9 @@ drawbar(Monitor *m)	Err	parazyd.org	70
i         unsigned int i, occ = 0, urg = 0;	Err	parazyd.org	70
i         Client *c;	Err	parazyd.org	70
i 	Err	parazyd.org	70
i+        if (!m->showbar)	Err	parazyd.org	70
i+                return;	Err	parazyd.org	70
i+	Err	parazyd.org	70
i         /* draw status first so it can be overdrawn by tags later */	Err	parazyd.org	70
i         if (m == selmon) { /* status is only drawn on selected monitor */	Err	parazyd.org	70
i                 drw_setscheme(drw, scheme[SchemeNorm]);	Err	parazyd.org	70
.