title: Javascript (sql or nosql or JSON) client side not HTML5 database libraries?
body: <p>We are developing a Javascript based UI(browser based) that needs some data selection  (filtering, sorting, grouping in different levels)I just want to ask about probable Javascript (sql or nosql/JSON) client side (not HTML5) database libraries,  also a performance comparison would be really helpful. </p>
  
  <p>Thanks.</p>