Corona SDK Pro Tip of the Day #27
print() statement

Don't overuse print() statement. If you often print some data, it may significantly slow down your app or game.

It's more noticeable on low-end devices.

If you already have a lot of print() statements, just replace the function with a blank one before building binaries for the stores.

function _G.print()  
    -- Do nothing
end  

Indie Game Developer