improved sampler to perform first tick immediately

config.yml

@@ -27,6 +27,33 @@ runcharts:
     size:
       x: 15
       y: 15
+  - title: SEARCH ENGINE RESPONSE TIME 2 (sec)
+    items:
+      - label: GOOGLE
+        script: curl -o /dev/null -s -w '%{time_total}'  https://www.google.com/
+      - label: YAHOO
+        script: curl -o /dev/null -s -w '%{time_total}'  https://search.yahoo.com/
+      - label: BING
+        script: curl -o /dev/null -s -w '%{time_total}'  https://www.bing.com/
+    refresh-rate-ms: 5000
+    decimal-places: 3
+    alert:
+      value:
+        more-than: 0.231
+        less-than: 0.123
+        equal: 0.144
+      indicator:
+        terminal: true
+        beep: true
+    legend:
+      enabled: true
+      details: true
+    position:
+      x: 0
+      y: 15
+    size:
+      x: 15
+      y: 15
   - title: MONGO COLLECTIONS COUNT
     items:
       - label: POSTS

config/default.go

@@ -38,7 +38,7 @@ func (config *Config) setDefaultColors() {
 	for i, chart := range config.RunCharts {
 		for j, item := range chart.Items {
 			if item.Color == 0 {
-				item.Color = palette.Colors[i+j]
+				item.Color = palette.Colors[i+j] // TODO handle out of range case
 				chart.Items[j] = item
 			}
 		}

console/console.go

@@ -8,7 +8,7 @@ import (
 )
 
 const (
-	RenderRate = 50 * time.Millisecond // TODO not a constant, should be dynamically chosen based on min X scale (per each chart? should be tested). if it is 1 sec, it should be 100 ms, if 2 - 200 ms, if 3 - 300, 4 - 400, 5 - 500 and 500 is max. smth like that.
+	RenderRate = 25 * time.Millisecond
 	Title      = "sampler"
 )
 

console/palette.go

@@ -21,14 +21,15 @@ const (
 
 type Palette struct {
 	Colors []ui.Color
+	// TODO Menu colors, like Dark, Medium, Light etc
 }
 
 func GetPalette(theme Theme) Palette {
 	switch theme {
 	case ThemeDark:
-		return Palette{Colors: []ui.Color{ColorOlive, ColorDeepSkyBlue, ColorDeepPink}}
+		return Palette{Colors: []ui.Color{ColorOlive, ColorDeepSkyBlue, ColorDeepPink, ColorOlive, ColorDeepSkyBlue, ColorDeepPink}}
 	case ThemeLight:
-		return Palette{Colors: []ui.Color{ColorOlive, ColorDeepSkyBlue, ColorDeepPink}}
+		return Palette{Colors: []ui.Color{ColorOlive, ColorDeepSkyBlue, ColorDeepPink, ColorOlive, ColorDeepSkyBlue, ColorDeepPink}}
 	default:
 		panic(fmt.Sprintf("Following theme is not supported: %v", theme))
 	}

data/sampler.go

@@ -11,16 +11,12 @@ type Sampler struct {
 
 func NewSampler(consumer Consumer, item Item, rateMs int) Sampler {
 
-	ticker := time.NewTicker(time.Duration(rateMs * int(time.Millisecond)))
 	sampler := Sampler{consumer, item}
 
 	go func() {
-		for {
+		for t := time.Tick(time.Duration(rateMs * int(time.Millisecond))); ; <-t {
-			select {
-			case <-ticker.C:
 			sampler.sample()
 		}
-		}
 	}()
 
 	return sampler