We're using Drupal 7 with commerce kickstart 2.10 - we're using dedicated server for our hosting, but the site's very slow compare to the hosting package - https://mukano.com
It'll be good if we can achieve the speed demonstrated here: http://demo.commerceguys.com/ck

I've optimized PHP & MySql but no significant changes, my.cnf file has the following config:
[mysqld]
max_connections = 300
key_buffer = 256M
myisam_sort_buffer_size = 32M
join_buffer_size = 1M
read_buffer_size = 1M
sort_buffer_size = 2M
table_cache = 4000
thread_cache_size = 296
interactive_timeout = 25
wait_timeout = 7000
connect_timeout = 10
max_allowed_packet = 100M
max_connect_errors = 10
query_cache_limit = 32M
query_cache_size = 64M
query_cache_type = 1
tmp_table_size = 32M
[mysqld_safe]
open_files_limit = 65535
[mysqldump]
max_allowed_packet = 32M
[myisamchk]
key_buffer = 32M
sort_buffer = 64M
read_buffer = 16M
write_buffer = 16M
[mysqlhotcopy]
interactive-timeout
log-slow-queries=/var/lib/mysql/slow.log

I'm I missing something? Any suggestions 'll be appreciated, thanks.