I forgot to add that I soaked them well before I fastened them up.

In my limited experience, I think it depends on the leaves. I never chopped my red oak leaves and they took two years to break down. I think SBG said that beech take 3 years. Other friends here will know more.

it rally depends on which leaf. Oak and beech have a high tannic acid content and will take much longer to break down. My beech take on average 3 years. they also need a good airflow through them or they stagnate.

I always used shedded leaves as mulch but never for composting. I really don’t see why shredded leaves should take 3 years to break down. Next time to assure a quicker composting time, how about this......shred then shred again or even shred 3 times.

I thank everyone for their advice, i did poke holes in the bottom of the bags and I did put the leaves through the vac for the last bag, wish I’d done for them all.
I now need to know what sort of trees they came from. Thanks again.

Not bagged up. I've applied to leaves to the planting beds already. The constant exposure to wind, rain, snow & temperature flux hastens the decomposition process. I agree with Monty. What kind of trees are they from? The best ones! Everything, who knows? I don't have time to sort that out, but last years leaves are all gone already.