Added note on changes

After some experiments, it turns out, that notifications for X
properties for the embedded window (i.e. tab) are not very often, but
they usually send with "packs", so for example, there could be several
different atoms send in short period of time, i.e.:

_XEMBED_INFO
WM_NORMAL_HINTS
WM_NORMAL_HINTS
WM_NAME
_NET_WM_NAME
WM_ICON_NAME
_NET_WM_ICON_NAME

Some of the atoms represents title change, size of window, size of the
font and so on. Allow those changes to be applied.

tabbedalt

@@ -172,6 +172,12 @@
 #   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.
 
 use Scalar::Util;
 
@@ -285,8 +291,9 @@ sub refresh {
       $self->{tabheight} = $self->{_tabheight};
    }
 
-   if ($old_tabheight != $self->{tabheight}) {
    $self->configure;
+
+   if ($old_tabheight != $self->{tabheight}) {
       $self->copy_properties;
    }
 
@@ -414,8 +421,8 @@ sub copy_properties {
    my $current = delete $self->{current_properties};
 
    # pass 1: copy over properties different or nonexisting
-   for my $atom ($tab->XListProperties ($tab->parent)) {
+   for my $atom ($tab->XListProperties($tab->parent)) {
-      my ($type, $format, $items) = $self->XGetWindowProperty ($tab->parent, $atom);
+      my ($type, $format, $items) = $self->XGetWindowProperty($tab->parent, $atom);
 
       # fix up size hints
       if ($atom == $wm_normal_hints) {
@@ -427,22 +434,29 @@ 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 {
@@ -807,14 +821,6 @@ 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
    my $atom = $event->{atom};
    my ($type, $format, $items) = $self->XGetWindowProperty ($tab->parent, $atom);