I’ve just released version 0.1.1.0 of effectful-opaleye, which adds a feature for debugging the efficiency of our DB operations. Specifically, it lets us track the number of SELECT, INSERT, UPDATE and DELETE operations we’ve performed inside the Opaleye effect (by table, where possible).
Since I think this is quite a cool feature, and demonstrates the awesome power of Effectful, I’ve written a blog post about the feature, including a demonstration, some motivation, and some details on the implementation.
Enjoy, and please let me know if you notice any mistakes 