This is probably one of the niche mods out there, but it is made to solve a nitpick I have about minecraft's handswing. It feels too slow.
What the mod does
It changes one single thing: reduces the handswing animation length from 6 to 5 ticks. That's it. No configuration, no runtime toggle.
This mod is so simple that it doesn't even need fabric api, you can just plop it into your newly created fabric instance and it will work out of the box.
Datapack edition
For all the maniacs (me) who want to use a faster hand swing mining animation without wanting to install mods.
This datapack works by conditionally applying haste 1 effect on the player, then scale back the mining and attack speed buff.
WARNING: BE CAUTIOUS WHEN PUTTING THIS ON A SERVER, AS THIS DATAPACK RUNS A PREDICATE CHECK EVERY TICK AND CAN POTENTIALLY HURT PERFORMANCE.
Datapack versions below 82 might receive errors from the json versioning format change on 82+.
Enjoy!