Added more memory optimizations

README.rst

@@ -183,7 +183,7 @@ several keysyms mapped to the actions:
 * ``Shift-Up``: ``rename_tab`` - for tab title renaming
 * ``Shift-Left``: ``prev_tab`` - for jumping to previous tab
 * ``Shift-Right``: ``next_tab`` - for jumping to next tab
-* ``Shift-Left``: ``move_tab_left`` - for moving tab to the left
+* ``Control-Left``: ``move_tab_left`` - for moving tab to the left
 * ``Control-Right``: ``move_tab_right`` - for moving tab to the right
 * ``Control-1..0``: ``jump_to_tab`` - for quickly jumping into first tenth tabs
 
@@ -200,9 +200,11 @@ It might be wise to define own shortcuts before disabling default keys.
    ``tab-command``, for example::
 
        URxvt.keysym.Control-t: tabbedalt:new_tab:htop:htop
+       URxvt.keysym.Control-Shift-R: tabbedalt:new_tab:root:sudo su -
 
    where pressing control+t it will run new tab with title ``htop`` and command
-   ``htop``.
+   ``htop``, while pressing control+shift+r will create tab with ``root``
+   title and run ``sudo su -`` inside.
 
    Both title and command may be omitted. If so, default title ``shell`` will
    be used in absence of title, and default shell will be run on missing
@@ -296,36 +298,6 @@ or `kdialog`_::
 
 or… any other dialog programs which fulfill the above criteria.
 
-Creating specific commands/shells
----------------------------------
-
-Let's assume, that one want to add three kind of custom shells:
-
-* simple one (default shell in the system),
-* midnight commander,
-* root (namely - su command)
-
-A way to do this is to associate keystroke for it in ``.Xdefaults`` using
-urxvts ``keysym`` option, and the actions described above::
-
-    URxvt.keysym.Control-Shift-N: tabbedalt:new_tab:shell
-    URxvt.keysym.Control-Shift-R: tabbedalt:new_tab:root:su -
-    URxvt.keysym.Control-Shift-M: tabbedalt:new_tab:mc:mc
-
-Resource values are colon separated values, which are in order:
-
-* **plugin name:command**, which in this case of creating new tab will be
-  ``tabbedalt:new_tab``.
-* **title of the tab**, it could be anything but the colon.
-* **optional command**. If omitted, default shell will be launched.
-
-Renaming tabs
--------------
-
-On runtime, tabs can be renamed using (by default) ``Shift+Up`` - now you can
-type name for the tab. ``Return`` accept change, ``ESC`` cancels it. This
-feature was taken from `stepb`_ tabbedx repository.
-
 .. _urxvt-unicode: http://software.schmorp.de/pkg/rxvt-unicode.html
 .. _activity indicator: http://mina86.com/2009/05/16/tabbed-urxvt-extension/
 .. _stepb: http://github.com/stepb/urxvt-tabbedex

tabbedalt

@@ -162,6 +162,16 @@
 # 2024-12-10 18:30:22
 # - Fix an issue with requesting closing terminal, which appear to be a
 #   single instance
+#
+# 2026-04-21 16:29:49
+# - Fix small but constant memory consumption, which over time eventually will
+#   cause urxvt to consume huge amount of memory
+#
+# 2026-04-21 18:34:16
+# - Make some more optimization on memory usage - remove data from destroyed
+#   tab and disable its hooks
+# - update tab property notifications, don't update it too often, clean up X 
+#   properties variables after use, update only changed X properties
 
 use Scalar::Util;
 
@@ -266,14 +276,16 @@ sub refresh {
    my ($self) = @_;
    my $tabs_no = (@{$self->{tabs}});
 
+   my $old_tabheight = $self->{tabheight} // 0;
+
    if ($self->{autohide} && $tabs_no == 1 &&
          ! $self->{cur}->{is_being_renamed}) {
       $self->{tabheight} = 0;
-      $self->configure;
-      $self->copy_properties;
-      return;
    } else {
       $self->{tabheight} = $self->{_tabheight};
+   }
+
+   if ($old_tabheight != $self->{tabheight}) {
       $self->configure;
       $self->copy_properties;
    }
@@ -283,6 +295,8 @@ sub refresh {
    my $text = " " x $ncol;
    my $rend = [($self->{rs_tabbar}) x $ncol];
 
+   undef $self->{tabofs};
+
    my ($ofs, $idx, @ofs) = (0, 0);
 
    if ($self->{new_button}) {
@@ -422,6 +436,9 @@ sub copy_properties {
          if $cur->[0] != $type or $cur->[1] != $format or $cur->[2] ne $items;
 
       $self->{current_properties}{$atom} = [$type, $format, $items];
+      undef $type;
+      undef $format;
+      undef $items;
    }
 
    # pass 2, delete all extraneous properties
@@ -744,6 +761,18 @@ sub tab_start {
 sub tab_destroy {
    my ($self, $tab) = @_;
 
+   # Disable hooks and remove data from tab
+   $tab->disable('line_update', 'key_press', 'property_notify', 'action', 'start', 'destroy');
+   delete $tab->{lastActivity};
+   delete $tab->{is_being_renamed};
+   delete $tab->{old_name};
+   delete $tab->{new_name};
+   delete $tab->{overlay};
+   delete $tab->{main};
+   delete $tab->{parent};
+   delete $tab->{'tabbedalt_main'};
+   delete $tab->{name};
+
    $self->{tabs} = [ grep $_ != $tab, @{ $self->{tabs} } ];
 
    if (@{ $self->{tabs} }) {
@@ -775,8 +804,37 @@ sub command {
 sub tab_property_notify {
    my ($self, $tab, $event) = @_;
 
-   $self->copy_properties
-      if $event->{window} == $tab->parent;
+   return () unless $event->{window} == $tab->parent;
+   return () unless $tab == $self->{cur};
+
+   # skip if called too often (within 0.1s)
+   my $now = urxvt::NOW;
+   my $last = $self->{last_property_update} // 0;
+   if ($now - $last < 0.1) {
+      return ();
+   }
+   $self->{last_property_update} = $now;
+
+   # update only the changed property instead of all properties
+   my $atom = $event->{atom};
+   my ($type, $format, $items) = $self->XGetWindowProperty ($tab->parent, $atom);
+
+   my $wm_normal_hints = $self->XInternAtom ("WM_NORMAL_HINTS");
+
+   # fix up size hints
+   if ($atom == $wm_normal_hints) {
+      my (@hints) = unpack "l!*", $items;
+      $hints[$_] += $self->{tabheight} for (4, 6, 16);
+      $items = pack "l!*", @hints;
+   }
+
+   $self->XChangeProperty ($self->parent, $atom, $type, $format, $items);
+   $self->{current_properties}{$atom} = [$type, $format, $items];
+
+   # free memory from X properties
+   undef $type;
+   undef $format;
+   undef $items;
 
    ()
 }