use parallel xz

diff --git a/ex b/ex
index 7859db3276e75e76486c8f17064e72d365785d39..85317e7d3385d40f8e6b842ad551d260d39e89ee 100755 (executable)
--- a/ex
+++ b/ex
@@ -54,8 +54,8 @@ Note: dtrx (package & command) extracts most of these plus some others."
         tar Jxf "$x"
         ;;
       *.xz)
-        $quiet || echo xz -d "$x"
-        xz -d "$x"
+        $quiet || echo pixz -d "$x"
+        pixz -d "$x"
         ;;
       *.7z )
         $quiet || echo 7za x "$x"