What OS, computer spec., program?
Should take 2-12 seconds.
As Photoshop starts on a windows PC system perhaps Mac too the splash screen displays little messages as to what Photoshop Startup is currently processing. Things like Plug-ins, Preferences etc. See if you can see where the startup time is being spent. Often Photoshop Add-ons can add to Photoshop startup latency. Some things need to be be initialized. Bugs, Huge Patterns bad fonts etc can increase the time it takes Photoshop to startup.