I beliebe, 0.3 s is extremely high. Just think. This means, you’ll be able to service no more, than 3 individual requests per s. That is, 180 requests per minute.
However, you should try to run it on a testing computer, like your home one, to see, how fast the code really is. The above data may be including the fact, that the server is allready under load.
In general, if noone complains about speed on the server, you should have no problems.
