decreasing read buffer to 4k
decreasing read buffer to 4k

tenderlove/yajl-ruby,brianmario/yajl-ruby,tenderlove/yajl-ruby,mrkn/yajl-ruby,sferik/yajl-ruby,brianmario/yajl-ruby,sferik/yajl-ruby,brianmario/yajl-ruby,sferik/yajl-ruby