Only seed rng once, at initialization, and speed up picking random file by using rand.Intn instead of shuffling the slice

cmd/files.go

@@ -495,13 +495,11 @@ func pickFile(args []string, filters *Filters, sort string, fileCache *[]string)
 		}
 	}
 
-	rand.Seed(time.Now().UnixNano())
-	rand.Shuffle(len(fileList), func(i, j int) { fileList[i], fileList[j] = fileList[j], fileList[i] })
+	for true {
+		i := rand.Intn(len(fileList))
 
-	for i := 0; i < len(fileList); i++ {
 		filePath := fileList[i]
 
-		// If not caching, check for valid images just before serving, to speed up scanning
 		if !Cache {
 			isImage, err := isImage(filePath)
 			if err != nil {

cmd/version.go

@@ -10,7 +10,7 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var Version = "0.20.2"
+var Version = "0.20.3"
 
 func init() {
 	rootCmd.AddCommand(versionCmd)

cmd/web.go

@@ -7,6 +7,7 @@ package cmd
 import (
 	"fmt"
 	"io"
+	"math/rand"
 	"net/http"
 	"net/url"
 	"os"
@@ -498,6 +499,8 @@ func ServePage(args []string) error {
 
 	re := regexp.MustCompile(`(.+)([0-9]{3})(\..+)`)
 
+	rand.Seed(time.Now().UnixNano())
+
 	fileCache := []string{}
 
 	http.Handle("/", serveHtmlHandler(paths, *re, &fileCache))