diff --git a/envvars.go b/envvars.go
index 2880637..3d036c3 100644
--- a/envvars.go
+++ b/envvars.go
@@ -11,10 +11,7 @@ import (
 )
 
 var (
-	Uid = envvars.Int("UID", 1000)
-	Gid = envvars.Int("GID", 1000)
-
-	PollRate = envvars.Object("POLL_RATE", 30*time.Minute, time.ParseDuration)
+	PollRate = envvars.Duration("POLL_RATE", 30*time.Minute)
 
 	AnilistUsername    = envvars.String("ANILIST_USERNAME", "username")
 	AnilistAccessToken = envvars.String("ANILIST_TOKEN", "")
@@ -73,7 +70,13 @@ var (
 	/*
 		TODO
 
+		better idea? implementation in torrent_sort.go (sort.Slice)
+		PreferredTorrents = envvars.StringSlice("PREFERRED_TORRENTS", []string{"seeders", "subtitles", "languages", "downloads"})
+
+		old idea?
 		PreferMoreLanguages = envvars.Bool("PREFERER_MORE_LANGUAGES", false)
 		PreferMoreSubtitles = envvars.Bool("PREFERER_MORE_SUBTITLES", false)
+		PreferMoreSeeders   = envvars.Bool("PREFERER_MORE_SEEDERS", false)
+		PreferMoreDownloads   = envvars.Bool("PREFERER_MORE_DOWNLOADS", false)
 	*/
 )
diff --git a/file_properties.go b/file_properties.go
index cf2e766..a77c9be 100644
--- a/file_properties.go
+++ b/file_properties.go
@@ -18,9 +18,20 @@ type FileProperties struct {
 
 var _ model.PropertyHolder = &FileProperties{}
 
-// TODO cache
-func AnalyzeFile(path string) (*FileProperties, error) {
-	props := &FileProperties{Filepath: path}
+var filePropCache = map[string]*FileProperties{}
+
+func AnalyzeFile(path string) (props *FileProperties, err error) {
+	// caching
+	if cacheEntry, ok := filePropCache[path]; ok {
+		return cacheEntry, nil
+	}
+	defer func() {
+		if err == nil {
+			filePropCache[path] = props
+		}
+	}()
+
+	props = &FileProperties{Filepath: path}
 
 	file, err := os.Open(path)
 	if err != nil {