Hi Kumar,
Jitterbit Data Loader offers a subset of features and functionality from our core Cloud integration platform. Included are the same performance features, including complete support for the Bulk API.
You can also edit batch sizes on a per-operation basis. Each operation runs against a specific SFDC object.
I’d highly recommend that you try Jitterbit Data Loader for yourself — it is easy to install and configure and it offers a number of Youtube videos to help get you started — plus it’s free, so there isn’t much risk, only upside when you realize how much easier it will make your job 🙂
Thanks