How to check how fast the review and publication process in a journal

Some journals are quite open and self-report submitted texts, rejection rate, time of the review process etc. For instance, one of the leading journals in my field (political science) does this every year here
Maybe there is something similar in your field of comp. science and educational science?!
Nice overviews about journals and their peer review process can be found on 2 websites: https://scirev.sc/ - you can choose your discipline or the specific journal. They don't list every journal but in some disciplines, they are quite good. Additionally and more related to open access journals is http://www.qoam.eu . As far as I know, on both sites, former authors are invited to assess the peer review process and so on. This often gives a good insight into the real publication time

In mathematics, the AMS publishes an annual report in the AMS Notices with data on how long journals take from submission to final acceptance (in addition to other things). The most recent edition of this is here.