php-pecl-yac-2.4.1-1.fc45.src.rpm

Yac (Yet Another Cache) is a shared memory user data cache for PHP. It can be used to replace APC or local memcached. Yac is lockless, that means, it is very fast, but there could be a chance you will get a wrong data(depends on how many key slots are allocated and how many keys are stored), so you'd better make sure that your product is not very sensitive to that.