i built write through caching by hand before checking if the plugin already did it

worked on a wordpress site where the cart count was wrong for about six seconds after every update. wrote a whole layer to keep the cache and the db in sycn on write, which is write through caching if you want the term for it, done badly.

the object cache plugin already had a coherent mode. off by default. one checkbox.

I left my version in for a week because i coudl not admit it, and it was fine, it just did the same job slower. deleted it in the end. what bothers me is that none of these plugins say anywhere which of them invalidate on write and which just