@Monsterjj15 There is a guide to getting the best performance possible on CraftMine, but not Steve’s Adventure pack.
However, you can use the following points/tips in the CraftMine guide for any modpack:“Get the latest 64bit Java” “Upgrade your graphics card or integrated graphics unit” “And finally… upgrade your CPU (desktops only)”
Please note that those points above are not settings-related, but general things you can do which will improve the performance of all games without needing to change settings.
For better performance in Steve’s Adventure Pack solely by changing settings, go to Esc -> Options -> Video settings and set Render distance to anything below 8. The lower the number, the less distance you can see but the faster the game will run. However, just changing settings won’t make as much difference as doing the points above too! ;)