Please use our recommended settings during the migration.
The recommended php.ini settings are:
Also please add:
define('WP_MEMORY_LIMIT', '1024M');in your wp-config.php file to increase the memory allowed by WordPress.
If you are on a shared host, you can't modify the php.ini file. Another solution is to install WordPress on your local computer and run the import in local. In this case, you won't have the limitations of the shared host.