decrease widget show time

[czk <czongke gmail com>]

hello everyone,
I use gtk+-3.0 in a embedded device. If I create a window put 4 buttons , 4 entrys  3 labels in it, from gtk_window_new to the window was showed spend 4 seconds totally. It a long time for me. Most time spend in gtk_widget_show_all.

Less than 1.5 second can acceptable. Any one has ideas? Thanks.