$ diff test-cache-lru.pl test-cache-mce.pl 
1a2,3
> # based on test-cache-lru.pl
> # https://github.com/celogeek/perl-test-caching/tree/master
8c10
< use Cache::LRU;
---
> use MCE::Shared::Cache;
17c19
< my $c = Cache::LRU->new(size => 500000);
---
> my $c = MCE::Shared::Cache->new(max_keys => 500000);