I recently purchased a used Samsung Galaxy S Captivate. While it seems fine for my purposes, it would be nice if it were just a bit faster, in terms of loading different pages more quickly. From what I've seen, Cyanogenmod claims that it's faster than many stock roms, since it doesn't use the company's extra interface, which, in this case, would be TouchWiz. However, Cyanogenmod would also bring my operating system up to Android 4.4, and I'm not sure how much additional power that would take. I'm also open to using older versions of Cyanogenmod, if that's feasible.
Would it be better in terms of performance to keep my phone at the stock rom or to install Cyanogenmod?