From 7660e9de645be6f4506cc29bd961ea131fc626e7 Mon Sep 17 00:00:00 2001
From: Ryo Nakao <ryo@nakao.dev>
Date: Sun, 25 Oct 2020 10:07:30 +0900
Subject: [PATCH] Use buffered channel for appending chart values (#79)

---
 gui/drawer.go | 7 +++----
 gui/gui.go    | 2 +-
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/gui/drawer.go b/gui/drawer.go
index b8ebd86..a4934e9 100644
--- a/gui/drawer.go
+++ b/gui/drawer.go
@@ -26,13 +26,12 @@ type drawer struct {
 	metricsCh chan *attacker.Metrics
 	doneCh    chan struct{}
 
-	chartValues values
-	metrics     *attacker.Metrics
-
 	// aims to avoid to perform multiple `appendChartValues`.
 	chartDrawing *atomic.Bool
 
-	mu sync.RWMutex
+	mu          sync.RWMutex
+	chartValues values
+	metrics     *attacker.Metrics
 }
 
 type values struct {
diff --git a/gui/gui.go b/gui/gui.go
index ce5e02b..660f3fd 100644
--- a/gui/gui.go
+++ b/gui/gui.go
@@ -68,7 +68,7 @@ func run(t terminalapi.Terminal, r runner, targetURL string, opts *attacker.Opti
 	d := &drawer{
 		widgets:      w,
 		gridOpts:     gridOpts,
-		chartCh:      make(chan *attacker.Result),
+		chartCh:      make(chan *attacker.Result, 10000),
 		gaugeCh:      make(chan struct{}),
 		metricsCh:    make(chan *attacker.Metrics),
 		chartDrawing: atomic.NewBool(false),