In the CrowdSight SDK, the system memory increases to allow recognition of the previously seen users, and to update of their face model.
In the data folder, there is a settings.ini file which can be used to adjust some of the parameters of the SDK, which depending on the application, will control the speed, accuracy, size of the package.
In order to have an immediate gain in memory consumption, you change the MemorySize setting to a lower number.
Further, in the same file, it is also possible to decrease the memory footprint by setting some of the classifiers (eg: the unused ones) to 0. In this case, the SDK won't load the information required by the classifiers in memory. In this case, you can also delete these unused files from the data folder to also decrease the size of your application.