How to increase item despawn rate minecraft?

Honestly, in vanilla Minecraft, you can't directly "increase" the despawn rate. Items on the ground will always despawn after exactly 5 minutes (6000 game ticks) if you're more than 128 blocks away. If you're within that range, the timer is paused. There's no setting to change this.

However, if you're trying to reduce lag from a massive number of items, here are some things you can do: * Use hoppers or minecart with hoppers to collect items instantly. * Dump items into lava or cactus to destroy them immediately. * If you're on a server, there might be plugins like ClearLag that can change despawn times or clear items periodically. You'd have to ask your server admin about that.