Want to make your Minecraft experience buttery smooth
Well, do I have the solution for you, provided you play on the Java edition.
Just follow these steps and we'll be setting our render distance above 10!
Step 1: In the Minecraft Launcher go to the "Installations" tab.
Step 2: Select the version you play on and click on "edit".
Step 3: Click on the drop-down-tab labeled "More Options" and scroll down to the section labeled "JVM Arguments".
Step 4: In the section of text where it says "-Xmx2G" change the number to the desired RAM usage. For example: -Xmx8G (Note: It is STRONGLY recommended that you do NOT set this number above 2/3 of your available RAM.)
Step 5: Click "save" and enjoy your buttery smooth Minecraft!
Indeed, I only allocate 512 MB and get around 1000 FPS even in my mod's most resource-demanding biome (trees exceeding cloud level from sea level; imagine how many faces are being rendered on Fancy graphics, though this is more of a video memory issue, which is completely separate from Java heap space; a higher world does increase memory usage, which is still only around 50%; of course, newer versions need more memory and resources because of Mojang's horrific coding practices):
Also, it is possible to have issues with insufficient memory if you allocate too much memory, even on a 64 bit OS, since memory allocated to Java takes away from system resources even if it isn't all being used (this is one reason why I allocate 512 MB; with 1 GB I've gotten a "Minecraft has run out of memory" screen which had nothing to do with running out of heap space):