improved local loading and decorating

src/sh/local.sh

@@ -85,7 +85,7 @@ __batch_load_missing() {
           ;;
         esac
         cnt=$((cnt + 1))
-        printf "\033[K\r%d/%d (%s)" "$cnt" "$lines" "$mbid"
+        printf "\033[K\r%d/%d (%s: %s)" "$cnt" "$lines" "$mbid" "$($JQ -r ".name // .title")"
         sleep 1
       done <"$tmpf"
       printf "\n"
@@ -105,8 +105,7 @@ load_local() {
   tmpreleases=$(mktemp)
   [ -f "$tmpreleases" ] || exit 1
   find "$MUSICDIR" -type f -name "$DECORATION_FILENAME" -print0 |
-    xargs -0 -I {} \
-      $JQ -r '.releaseid+"\t"+input_filename' {} |
+    xargs -0 -P 4 $JQ -r '.releaseid+"\t"+input_filename' |
     tee "$LOCALDATA_RELEASES" |
     cut -d "$(printf '\t')" -f 1 >"$tmpreleases"
   __batch_load_missing "$TYPE_RELEASE" "$tmpreleases"