Update only selected properties, not all.

That should slightly decrease memory consumption.

tabbedalt

@@ -172,6 +172,23 @@
 #   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
+#
+# 2026-08-10 17:20:53
+# - remove variables in copy_properties to free memory
+# - call configure() every time on refresh
+# - removed throttling to suppress tab property notifications, as they need to
+#   be applied as every call there is different atom to process.
+#
+# 2026-08-11 18:42:45
+# - removed call copy_properties() call from refresh() to avoid unnecessary 
+#   Xlib interaction (to spare memory as the consequence) and rely only on 
+#   notifications.
+# - removed call for configure() from places, which will call refresh() as in 
+#   refresh() configure will be called anyway.
+#
+# 2026-08-12 20:40:54
+# - narrow down X properties which will be updated during tab_property_notify,
+#   which should slightly improve memory consumption.
 
 use Scalar::Util;
 
@@ -285,10 +302,7 @@ sub refresh {
       $self->{tabheight} = $self->{_tabheight};
    }
 
-   if ($old_tabheight != $self->{tabheight}) {
    $self->configure;
-      $self->copy_properties;
-   }
 
    my $ncol = $self->ncol;
 
@@ -414,8 +428,8 @@ sub copy_properties {
    my $current = delete $self->{current_properties};
 
    # pass 1: copy over properties different or nonexisting
-   for my $atom ($tab->XListProperties ($tab->parent)) {
-      my ($type, $format, $items) = $self->XGetWindowProperty ($tab->parent, $atom);
+   for my $atom ($tab->XListProperties($tab->parent)) {
+      my ($type, $format, $items) = $self->XGetWindowProperty($tab->parent, $atom);
 
       # fix up size hints
       if ($atom == $wm_normal_hints) {
@@ -427,22 +441,29 @@ sub copy_properties {
          $hints[$_] += $self->{tabheight} for (4, 6, 16);
 
          $items = pack "l!*", @hints;
+         undef @hints;
       }
 
       my $cur = delete $current->{$atom};
 
       # update if changed, we assume empty items and zero type and format will not happen
-      $self->XChangeProperty ($self->parent, $atom, $type, $format, $items)
+      $self->XChangeProperty($self->parent, $atom, $type, $format, $items)
          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;
+      undef $atom;
+      undef $cur;
    }
 
    # pass 2, delete all extraneous properties
    $self->XDeleteProperty ($self->parent, $_) for keys %$current;
+
+   undef $current;
+   undef $wm_normal_hints;
 }
 
 sub make_current {
@@ -466,7 +487,6 @@ sub make_current {
    $self->{cur} = $tab;
    $tab->enable_activity_hook(0);
 
-   $self->configure;
    $self->copy_properties;
 
    $tab->focus_out; # just in case, should be a nop
@@ -665,7 +685,6 @@ _on start => sub {
 _on configure_notify => sub {
    my ($self, $event) = @_;
 
-   $self->configure;
    $self->refresh;
 
    ()
@@ -807,16 +826,11 @@ sub tab_property_notify {
    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
+   # update only the changed selected property instead of all properties
    my $atom = $event->{atom};
+   my %allowed = map { $_ => 1 } qw(WM_NORMAL_HINTS _NET_WM_NAME WM_NAME);
+   return () unless ($allowed{$self->XGetAtomName($atom)});
+
    my ($type, $format, $items) = $self->XGetWindowProperty ($tab->parent, $atom);
 
    my $wm_normal_hints = $self->XInternAtom ("WM_NORMAL_HINTS");
@@ -832,6 +846,7 @@ sub tab_property_notify {
    $self->{current_properties}{$atom} = [$type, $format, $items];
 
    # free memory from X properties
+   undef $wm_normal_hints;
    undef $type;
    undef $format;
    undef $items;