Shuffling items in a chest

As of 1.9, you can use Loot Tables to randomize chest contents, which includes what slots the items appear within.

For example, given the following loot table under the filepath .minecraft/saves/WORLD/data/loot_tables/test/pickaxes.json:

{
    "pools": [
        {
            "rolls": 27,
            "entries": [
                {
                    "type": "item",
                    "name": "minecraft:diamond_pickaxe",
                    "weight": 1
                },
                {
                    "type": "item",
                    "name": "minecraft:golden_pickaxe",
                    "weight": 1
                }
            ]
        }
    ]
}

The chest to be created using that loot table:

/setblock ~ ~1 ~ minecraft:chest 0 replace {LootTable:"test:pickaxes"}

All 27 slots will be filled with each slot having an equal chance of being either a diamond or a gold pickaxe. Modify the weight to change the chances in comparison to one another; if diamond pickaxes have a higher weight compared to gold, they will be chosen more often. Modify rolls to change how many slots are to be filled.

I made a point not to use commands, so that you can build the shuffler in full survival mode.

Well, i did not manage to shrink the time. I could have, but not waiting for the droppers to fill up completely leads to a partial shuffling, and this is not good.

My design solves the other problem, the number of items scrambled. With this machine you can randomize up to a full double chest of items.

I look forward to build a more efficient one, the challenge intrigues me, but here's the product this far, hope you like it :)

This is the world download.

Some instruction + pics

To make the shuffler run, turn off the lever. The light will turn off. For the farm to work correctly, keep the lever off until finished. When the items starts to be delivered, a yellow block rises from the farm, dropping down again once is finished. Left chest is input (i put 18 name tagged items for demo), right one is output.

To test it out another time after the first one, turn the lever on again, put the item to shuffle all together in the left chest, then switch off again and wait. I prepared a chest full of nbt chest with the demo items. If you want ot repeat the test, just empty the output chest and replace one of the two in input with an nbt one, then switch off the lever aaaand you got it.

EDIT: i built a bigger one. Added to the same world download. Always 54 items max sorting size, but this one is capable of shuffling them better and at a much higher speed.

54 items take 1.08 min to be completely randomized.

The system works in the same way as the one before, only starts shuffling as soon as a dropper is full, instead of waiting a full shuffle and then doing another cycle. The design is also infinitely stackable (reeeeeally well shuffled, baby)

I think i'll do a final one in the next days, one with settable shuffling levels and much more compact.