How to reduce build time wxWidgets application??

[GGL]

Greetings all!
I'm beginner in wxWidgets applications development.
I use mingw 3.4.5 and codeblocks nightly build 5208 with wxWidgets 2.8.9
I create new wxWidgets application using master with precompiled headers and unicode support, empty application build time is about 40 sec, i use static wxWidgets. What should i do to reduce build time?
And 2nd question, why empty application with form only requires wxJpeg and wxTiff?

[aurisc4]

I use mingw 3.4.5 and codeblocks nightly build 5208 with wxWidgets 2.8.9
I create new wxWidgets application using master with precompiled headers and unicode support, empty application build time is about 40 sec, i use static wxWidgets. What should i do to reduce build time?

Are you sure that precompiled header is used? 40 sec. is about the time without precompiles. See C::B wiki for using precompiled headers.
By the way, I noticed, that when I open C::B, I need sometimes manually precompile header, to make use of it...

[GGL]

When i create wxWidgets application in master, i choose "Create and use precompiled header (PCH)"