Analysis of sampling xchat (pid 34607) every 1 millisecond
Call graph:
    24107 Thread_1171377   DispatchQueue_1: com.apple.main-thread  (serial)
      24107 start
        24107 main
          24107 gtk_widget_show
            24107 g_signal_emit
              24107 g_signal_emit_valist
                24107 signal_emit_unlocked_R
                  24107 g_closure_invoke
                    24107 gtk_window_show
                      24107 gtk_window_compute_configure_request
                        24107 _gtk_size_group_compute_requisition
                          24107 g_signal_emit_by_name
                            24107 g_signal_emit_valist
                              24107 signal_emit_unlocked_R
                                24107 g_closure_invoke
                                  24107 gtk_window_size_request
                                    24107 _gtk_size_group_compute_requisition
                                      24107 g_signal_emit_by_name
                                        24107 g_signal_emit_valist
                                          24107 signal_emit_unlocked_R
                                            24107 g_closure_invoke
                                              24107 gtk_box_size_request
                                                24107 _gtk_size_group_compute_requisition
                                                  24107 g_signal_emit_by_name
                                                    24107 g_signal_emit_valist
                                                      24107 signal_emit_unlocked_R
                                                        24107 g_closure_invoke
                                                          24107 gtk_box_size_request
                                                            24107 _gtk_size_group_compute_requisition
                                                              24107 g_signal_emit_by_name
                                                                24107 g_signal_emit_valist
                                                                  24107 signal_emit_unlocked_R
                                                                    24107 g_closure_invoke
                                                                      24107 gtk_table_size_request
                                                                        24107 _gtk_size_group_compute_requisition
                                                                          24107 g_signal_emit_by_name
                                                                            24107 g_signal_emit_valist
                                                                              24107 signal_emit_unlocked_R
                                                                                24107 g_closure_invoke
                                                                                  24107 gtk_scrolled_window_size_request
                                                                                    24107 _gtk_size_group_compute_requisition
                                                                                      24107 g_signal_emit_by_name
                                                                                        24107 g_signal_emit_valist
                                                                                          24107 signal_emit_unlocked_R
                                                                                            24107 g_closure_invoke
                                                                                              24107 gtk_tree_view_size_request
                                                                                                24107 do_validate_rows
                                                                                                  24107 validate_row
                                                                                                    24107 gtk_tree_view_column_cell_get_size
                                                                                                      24107 gtk_cell_renderer_text_get_size
                                                                                                        24107 get_size
                                                                                                          24107 pango_layout_get_pixel_extents
                                                                                                            24107 pango_layout_get_extents_internal
                                                                                                              24107 pango_layout_check_lines
                                                                                                                24107 process_item
                                                                                                                  24107 shape_run
                                                                                                                    24107 pango_shape
                                                                                                                      24107 basic_engine_shape
                                                                                                                        12145 _pango_ot_info_position
                                                                                                                          12143 hb_ot_layout_position_lookup
                                                                                                                            6704 hb_ot_layout_position_lookup
                                                                                                                            5438 PosLookupSubTable::apply(_hb_ot_layout_context_t*, _hb_buffer_t*, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) const
                                                                                                                            1 _hb_ot_layout_check_glyph_property
                                                                                                                          1 _pango_ot_info_position
                                                                                                                          1 hb_font_destroy
                                                                                                                            1 g_atomic_int_exchange_and_add
                                                                                                                        11961 _pango_ot_info_substitute
                                                                                                                          11961 hb_ot_layout_substitute_lookup
                                                                                                                            6768 hb_ot_layout_substitute_lookup
                                                                                                                            5191 SubstLookupSubTable::apply(_hb_ot_layout_context_t*, _hb_buffer_t*, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) const
                                                                                                                            1 _hb_buffer_clear_output
                                                                                                                            1 _hb_ot_layout_check_glyph_property
                                                                                                                        1 pango_ot_buffer_output
                                                                                                                          1 _pango_cairo_font_private_get_glyph_extents
                                                                                                                            1 cairo_scaled_font_glyph_extents
                                                                                                                              1 _cairo_scaled_glyph_lookup
                                                                                                                                1 _cairo_ft_scaled_glyph_init

Total number in stack (recursive counted multiple, when >=5):
        7       g_closure_invoke
        7       g_signal_emit_valist
        7       signal_emit_unlocked_R
        6       _gtk_size_group_compute_requisition
        6       g_signal_emit_by_name

Sort by top of stack, same collapsed (when >= 5):
        hb_ot_layout_substitute_lookup        6768
        hb_ot_layout_position_lookup        6704
        PosLookupSubTable::apply(_hb_ot_layout_context_t*, _hb_buffer_t*, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) const        5438
        SubstLookupSubTable::apply(_hb_ot_layout_context_t*, _hb_buffer_t*, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) const        5191
