oh my god, I am pro at this, watched millions of videos about boosting fps when I was on laptop with 100fps...
-So just make windows lighter so it uses less ram (tutorials on yt)
-Set Minecraft on high priority (A lot of tutorials on youtube)
-Packs, DOES NOT BOOST YOUR FPS BY ALOT, if you are using16x16, 32x32, 64x64, its same (if you have decent pc), but if you have low end pc then you can use 32x32 or 16x16 for best performance.
-Lower your graphics settings in minecraft
-Use memory fix mod (it lowers memory usage)
-upgrade your ram, if you are running forge with mods then you will need more ram for sure
-keep windows and graphics drivers up to date
If you have more questions, feel free to ask me