Two seconds faster? It shouldn't even take two seconds at all.
You can gain much more both in startup time and overall speed if you remove all the junk that comes with Code::Blocks which you don't ever use. Unluckily, as a software grows and matures, the cruft that comes with it grows, too. Code::Blocks is not one of the worst offenders (Microsoft Office, Windows, and Firefox come to mind) but it is not immune to that effect either.
Compiling in 64 bits gets you close to zero benefit, but it causes some obscure problems (works 98% of the time, crashes 1% of the time, corrupts data 1% of the time) with wxWidgets 2.8 due to stuff like passing pointers as integers and the like internally.
Disable or uninstall a dozen plugins that do nothing useful, or 35 lexers for languages that you do not use (and some of which you've probably not even heard of). There's about 50 new project templates for languages and toolkits that you likely don't use (those aren't loaded at startup, but they still make your everyday workflow slower by needlessly offering you options that you are never going to want and forcing you to scroll to find the ones you need).
Have you ever written a program in Hitachi ASM? Do you program in Cg and write LaTEX documents with Code::Blocks? Seriously? Verilog? How many times per year do you need an XP Manifest created? Do you write programs with wxWidgets at all (if no, what do you need wxSmith for)?
Why do you have Code::Blocks load these files every time it starts up?
Do you regularly start projects that use SFML and SDL at the same time (or Ogre and Irrlicht at the same time), and you write programs in native OpenGL and DirectX and using GLFW too, all at the same time? Sometimes, many choices are good, but sometimes they're not.