1.14 all versions slow loading

on Minecraft 1.14 and above my chunk loading is super slow and i know my pc can run everything at max graphics and play perfectly fine ive been looking around and see some problems is with Java 8 side aswell i have to play with 6 render distance so i dont get mad at how slow chunks are loading i hope if 1.15 comes out you Focus mainly on the performance of the game because Optifine doesnt help with anything anymore aswell