use jpg format to encode

main.go

@@ -1,11 +1,13 @@
 package main
 
 import (
+	"fmt"
 	"golang.org/x/image/webp"
-	"image/png"
+	"image/jpeg"
 	"io"
 	"log"
 	"os"
+	"time"
 )
 
 func main() {
@@ -21,19 +23,25 @@ func main() {
 	defer iFile.Close()
 	inFile = iFile
 
-	oFile, err := os.OpenFile("/home/debuggerx/Pictures/test.png", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 666)
+	oFile, err := os.OpenFile("/home/debuggerx/Pictures/test.jpg", os.O_CREATE|os.O_WRONLY|os.O_APPEND, os.FileMode(0644))
 	if err != nil {
 		log.Fatal(err)
 	}
 	defer oFile.Close()
 	outFile = oFile
 
+	startTime := time.Now().UnixNano()
 	m, err := webp.Decode(inFile)
+	endTime := time.Now().UnixNano()
+	fmt.Println((endTime - startTime) / 1000000)
 	if err != nil {
 		log.Fatal(err)
 	}
 
-	err = png.Encode(outFile, m)
+	startTime = time.Now().UnixNano()
+	err = jpeg.Encode(outFile, m, &jpeg.Options{Quality: 50})
+	endTime = time.Now().UnixNano()
+	fmt.Println((endTime - startTime) / 1000000)
 	if err != nil {
 		log.Fatal(err)
 	}