diff --git a/charts_test.go b/charts_test.go
new file mode 100644
index 0000000..da75ee5
--- /dev/null
+++ b/charts_test.go
@@ -0,0 +1,255 @@
+// MIT License
+
+// Copyright (c) 2022 Tree Xie
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package charts
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/wcharczuk/go-chart/v2"
+)
+
+func BenchmarkMultiChartPNGRender(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		opt := ChartOption{
+			Type: ChartOutputPNG,
+			Legend: LegendOption{
+				Top: "-90",
+				Data: []string{
+					"Milk Tea",
+					"Matcha Latte",
+					"Cheese Cocoa",
+					"Walnut Brownie",
+				},
+			},
+			Padding: chart.Box{
+				Top:    100,
+				Right:  10,
+				Bottom: 10,
+				Left:   10,
+			},
+			XAxis: NewXAxisOption([]string{
+				"2012",
+				"2013",
+				"2014",
+				"2015",
+				"2016",
+				"2017",
+			}),
+			YAxisOptions: []YAxisOption{
+				{
+
+					Min: NewFloatPoint(0),
+					Max: NewFloatPoint(90),
+				},
+			},
+			SeriesList: []Series{
+				NewSeriesFromValues([]float64{
+					56.5,
+					82.1,
+					88.7,
+					70.1,
+					53.4,
+					85.1,
+				}),
+				NewSeriesFromValues([]float64{
+					51.1,
+					51.4,
+					55.1,
+					53.3,
+					73.8,
+					68.7,
+				}),
+				NewSeriesFromValues([]float64{
+					40.1,
+					62.2,
+					69.5,
+					36.4,
+					45.2,
+					32.5,
+				}, ChartTypeBar),
+				NewSeriesFromValues([]float64{
+					25.2,
+					37.1,
+					41.2,
+					18,
+					33.9,
+					49.1,
+				}, ChartTypeBar),
+			},
+			Children: []ChartOption{
+				{
+					Legend: LegendOption{
+						Show: FalseFlag(),
+						Data: []string{
+							"Milk Tea",
+							"Matcha Latte",
+							"Cheese Cocoa",
+							"Walnut Brownie",
+						},
+					},
+					Box: chart.Box{
+						Top:    20,
+						Left:   400,
+						Right:  500,
+						Bottom: 120,
+					},
+					SeriesList: NewPieSeriesList([]float64{
+						435.9,
+						354.3,
+						285.9,
+						204.5,
+					}, PieSeriesOption{
+						Label: SeriesLabel{
+							Show: true,
+						},
+						Radius: "35%",
+					}),
+				},
+			},
+		}
+		d, err := Render(opt)
+		if err != nil {
+			panic(err)
+		}
+		buf, err := d.Bytes()
+		if err != nil {
+			panic(err)
+		}
+		if len(buf) == 0 {
+			panic(errors.New("data is nil"))
+		}
+	}
+}
+
+func BenchmarkMultiChartSVGRender(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		opt := ChartOption{
+			Legend: LegendOption{
+				Top: "-90",
+				Data: []string{
+					"Milk Tea",
+					"Matcha Latte",
+					"Cheese Cocoa",
+					"Walnut Brownie",
+				},
+			},
+			Padding: chart.Box{
+				Top:    100,
+				Right:  10,
+				Bottom: 10,
+				Left:   10,
+			},
+			XAxis: NewXAxisOption([]string{
+				"2012",
+				"2013",
+				"2014",
+				"2015",
+				"2016",
+				"2017",
+			}),
+			YAxisOptions: []YAxisOption{
+				{
+
+					Min: NewFloatPoint(0),
+					Max: NewFloatPoint(90),
+				},
+			},
+			SeriesList: []Series{
+				NewSeriesFromValues([]float64{
+					56.5,
+					82.1,
+					88.7,
+					70.1,
+					53.4,
+					85.1,
+				}),
+				NewSeriesFromValues([]float64{
+					51.1,
+					51.4,
+					55.1,
+					53.3,
+					73.8,
+					68.7,
+				}),
+				NewSeriesFromValues([]float64{
+					40.1,
+					62.2,
+					69.5,
+					36.4,
+					45.2,
+					32.5,
+				}, ChartTypeBar),
+				NewSeriesFromValues([]float64{
+					25.2,
+					37.1,
+					41.2,
+					18,
+					33.9,
+					49.1,
+				}, ChartTypeBar),
+			},
+			Children: []ChartOption{
+				{
+					Legend: LegendOption{
+						Show: FalseFlag(),
+						Data: []string{
+							"Milk Tea",
+							"Matcha Latte",
+							"Cheese Cocoa",
+							"Walnut Brownie",
+						},
+					},
+					Box: chart.Box{
+						Top:    20,
+						Left:   400,
+						Right:  500,
+						Bottom: 120,
+					},
+					SeriesList: NewPieSeriesList([]float64{
+						435.9,
+						354.3,
+						285.9,
+						204.5,
+					}, PieSeriesOption{
+						Label: SeriesLabel{
+							Show: true,
+						},
+						Radius: "35%",
+					}),
+				},
+			},
+		}
+		d, err := Render(opt)
+		if err != nil {
+			panic(err)
+		}
+		buf, err := d.Bytes()
+		if err != nil {
+			panic(err)
+		}
+		if len(buf) == 0 {
+			panic(errors.New("data is nil"))
+		}
+	}
+}
diff --git a/table_test.go b/table_test.go
index 41a857c..a958c95 100644
--- a/table_test.go
+++ b/table_test.go
@@ -23,7 +23,6 @@
 package charts
 
 import (
-	"fmt"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -136,7 +135,6 @@ func TestTableChart(t *testing.T) {
 		assert.Nil(err)
 		data, err := tt.render(p)
 		assert.Nil(err)
-		fmt.Println(string(data))
 		assert.Equal(tt.result, string(data))
 	}
 }