csv engine and mysql start

my question is about speed when perform service mysql start. with many tables (some not often used). what engines consumes more or less start time ? example: innodb --> the more tables, the more time it takes for mysql to start because it has to "load" indexes at start... but how is it with csv engine (no indexes) ; how mysql with "deal" with those tables during a mysql start ? Thanks (from Comment) I don't use innodb. I have some aria tables, tokudb tables and rocksdb tables.