Informix 7.31 and 9.40 comparisons

Hi All, Excuse my potential ignorance, but are there any papers/studies out there comparing informix 7.31 with 9.40 in terms of performance? What have your experiences been performance wise since upgrading to 9.40? Thanks and regards Stefan ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the sender and delete the material from any computer. You can visit Nylex at http://www.nylex.com.au ********************************************************************** sending to informix-list