[MC-111460] generic.attackSpeed seems to decrease attack damage

the default attack speed on item seems to ignore generic.attackSpeed and makes the attack less powerful even if i click at normal speed
command:

/give @p diamond_sword 1 0 {AttributeModifiers:[{slot:"mainhand",AttributeName:"generic.attackSpeed",Name:"generic.attackSpeed",Amount:32767,Operation:0,UUIDLeast:1,UUIDMost:1}]}