Electronic Colloquium on Computational Complexity

The Electronic Colloquium on Computational Complexity (ECCC) is an electronic archive of research papers in computational complexity theory, a branch of computer science. The intention of the ECCC is to provide a fast publication service intermediate in its level of peer review between preprint servers such as authors' web sites or arXiv (which release papers with little or no delay and filtering) and journals (which subject papers to a heavy editing process but, in computer science, may take months or years to publish a paper).

Source: Wikipedia — Electronic Colloquium on Computational Complexity (CC BY-SA 4.0)