Predictive compilation is the problem of determining good sequences of analyses and optimizations for particular programs. Although predictive compilers have enjoyed much progress in recent years, their development still faces a difficult challenge: the vastness of the space of possible optimizations that can be matched with each program. The effective exploration of this space is a community task that must be carried out gradually and systematically. Towards this vision, this repo provides an Docker image that contains an optimization cache for research on code-size reduction. In addition, this image provides a set of building blocks so that the user can build his/her own application.