You can use FSRS4Anki to optimize your study efficiency.
FSRS4Anki is A modern Anki custom scheduling based on Free Spaced Repetition Scheduler algorithm.
It consists of two main parts: scheduler and optimizer.
The scheduler is based on a variant of the DSR (Difficulty, Stability, Retrievability) model, which is used to predict memory states. The scheduler aims to achieve the requested retention for each card and each review.
The optimizer applies Maximum Likelihood Estimation and Backpropagation Through Time to estimate the stability of memory and learn the laws of memory from time-series review logs. Then, it can find the optimal retention to minimize the repetitions via the stochastic shortest path algorithm.
Here is the usage: