Technically Lambda polls SQS (minimum 5 pollers when used as an event source for Lambda). But you don't have to think too much about it.
It's mostly important to remember when you're wondering why your mostly-empty queue is still costing you $0.26/month, even if you've got the receive message timeout set to 20 seconds.
It's mostly important to remember when you're wondering why your mostly-empty queue is still costing you $0.26/month, even if you've got the receive message timeout set to 20 seconds.