You could check the CPU and memory usage if you remember what they were previously. Basically interface ACLs are checked top to bottom until a match is found. Even remarks which you enter to describe an ACL is checked. The more ACL entries (ACE) the ASA needs to check for a match, the more CPU and memory needs to be allocated to this action. Also if you have logging enabled for the ACEs then that will also require a small amout of CPU, but multiply that by 6000, the small amount becomes a big amount.
The same applies to policy NAT. The ACEs are checked top to bottom for a match. So you should see some improvement in the ASA performance.
show cpu
show cpu detail
show memory
show memory detail
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