瀏覽代碼

Fix high CPU usage when rendering status bar

Looking up the width of special color setting characters was causing
high CPU usage. Ignore special characters when calculating the width.
Frans Bergman 4 年之前
父節點
當前提交
23937acdbc
共有 1 個文件被更改,包括 14 次插入1 次删除
  1. 14 1
      dwm.c

+ 14 - 1
dwm.c

@@ -885,7 +885,20 @@ drawbar(Monitor *m)
 	/* draw status first so it can be overdrawn by tags later */
 	if (m == selmon) { /* status is only drawn on selected monitor */
 		drw_setscheme(drw, scheme[SchemeNorm]);
-		sw = TEXTW(stext) - lrpad + 2; /* 2px right padding */
+		/* calculate text width while ignoring special chars */
+		sw = 0;
+		while (1) {
+			if ((unsigned int)*ts > LENGTH(colors)) { ts++; continue ; }
+			ctmp = *ts;
+			*ts = '\0';
+			sw += TEXTW(tp) -lrpad;
+			if (ctmp == '\0') { break; }
+			*ts = ctmp;
+			tp = ++ts;
+		}
+		ts = stext;
+		tp = stext;
+		/* render text */
 		while (1) {
 			if ((unsigned int)*ts > LENGTH(colors)) { ts++; continue ; }
 			ctmp = *ts;