Disable attack cool down in Minecraft Vanilla 1.9/1.10 server?

I'm running a small server (in 1.8 at the moment) and am thinking about upgrading to 1.9 or 1.10.

But the most important thing: I don't want to have any kind of "cool down" during attacking. Is there any way to remove it in Vanilla?

Might there be a better way than this youtube tutorial?

Solution 1:

1. First place a command block and paste in this command:

   /replaceitem entity @p slot.armor.head minecraft:wooden_button 1 0 {AttributeModifiers [{AttributeName:"generic.attackSpeed",Name:generic.attackSpeed,Amount:99999999,Operation:0,UUIDMost:90498,UUIDLeast:161150}]}
   

2. Place a button on the command block and press it.

3. You should have a button automatically placed in your helmet slot.

4. No Cooldown!