From 402935bcac077241b32bf45119257c6adf4c8348 Mon Sep 17 00:00:00 2001
From: Valentin Boettcher <valentin@boettcher.cf>
Date: Tue, 27 Mar 2018 18:05:18 +0200
Subject: [PATCH] A bit of a string performance trick.

---
 src/avtk/clipselector.cxx |  8 +++-----
 src/avtk/clipselector.hxx | 20 ++++++++++++++------
 2 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/src/avtk/clipselector.cxx b/src/avtk/clipselector.cxx
index b56e55b..90b8b68 100644
--- a/src/avtk/clipselector.cxx
+++ b/src/avtk/clipselector.cxx
@@ -211,14 +211,12 @@ void ClipSelector::draw()
 
 			// clip bars
 			if(!_master) {
-				int bars = clips[i].getBeats() / 4;
-				int barsToRecord = clips[i].getBarsToRecord();
-				bars = (bars == 0) ? barsToRecord : bars;
-				if(bars > 0) {
+				const char * bars = clips[i].getBarsString();
+				if(bars) {
 					cairo_move_to( cr, x + clipHeight + 5, drawY + textHeight + 8);
 					cairo_set_source_rgba( cr, 255 / 255.f, 255 / 255.f , 255 / 255.f , 0.9 );
 					cairo_set_font_size( cr, 8 );
-					cairo_show_text( cr, std::to_string(bars).c_str());
+					cairo_show_text( cr, bars);
 				}
 			}
 
diff --git a/src/avtk/clipselector.hxx b/src/avtk/clipselector.hxx
index 5c7caa2..c89ace7 100644
--- a/src/avtk/clipselector.hxx
+++ b/src/avtk/clipselector.hxx
@@ -71,23 +71,31 @@ public:
 
 	// we wrap it here, so there may be no
 	// fuzz with the looperclip
-	int getBeats(){
+	const char * getBarsString(){
 		if(!lclip)
 			return 0;
 
-		return lclip->getBeats();
-	}
+		int beats = lclip->getBeats();
+		int barsToRecord = lclip->getBarsToRecord();
+		int bars = (beats == 0) ? barsToRecord : beats / 4;
 
-	int getBarsToRecord(){
-		if(!lclip)
+		if (bars <= 0)
 			return 0;
-		return lclip->getBarsToRecord();
+
+		if(bars != lastBars)
+			barsText = std::to_string(bars);
+
+		return barsText.c_str();
 	}
 
 private:
 	GridLogic::State state;
 	std::string name;
 	LooperClip* lclip;
+	std::string barsText;
+
+	// tmp
+	int lastBars;
 };
 
 class ClipSelector : public Fl_Button