+ Horde_Shares Some performance charts with the sql driver: [[image http://chart.apis.google.com/chart?chxl=0:|pdo_sqlite|pdo_pgsql|pdo_mysql|mysqli|mysql&chxp=0,4,3,2,1,0&chxr=0,0,4&chxt=x&chs=440x220&cht=lxy&chco=008000,FF9900&chd=s:_,NPNpH,_,PPPQH&chdl=Share+creation|listShares()&chdlp=b&chls=1|1&chma=15,15,5,25&chtt=Horde_Share+performance+(less+is+better)]] Note: the sqlite driver was test with an in-memory database