I migrated the mw project to new server, the environment is the same (php apache mysql version), just move to another virtual machine, it takes over 30 seconds to open page, but if I install a new mw project on the same server, it opens very quick, anything need to tuning after migration?
Topic on Project:Support desk
You may enable Profiling to see which part is taking too long.
Monitoring CPU usage and process list may also help, if problem is in database or apache+php.
If it's database, after importing the database, maybe you need to rebuild database indices. See After importing sql files indexes in place, but not actually indexed