Libre office documents are taking longer time to open.The only thing I changed is the java version.Uninstalled sun java and installed openJDK6.Can it be the cause ? Does java effect the way the documents are opened? If that is the case I can install java 7.
It seems java is needed mainly for the Assistive Tools (eg. on-screen keyboard etc) and also if you open java macros. Also the letter wizard. I would not install jre-7u1 at this stage as I have heard that it is not yet compatible with LibreOffice. I have not really noticed any delays but am using version 1.6.0_29
well i have java jre 7 in scientific linux after that i install libre office 3.4 1st time i give me java error but second time it auto recognized java 7 jre so no problem also you can increase the memory of open office it make it pretty fast on 1st time its little slow but opening on second are pretty fast just open writer click on tools then on option set memory according to requirements 2nd you can disable java run time if you want no problems. 3rd you can enable quickstart tool as well it will be there in your system tray (panel) and start on click pretty fast
Some extensions like Language Tool which is equivalent of grammar check in MS Office needs openoffice.org-java-common installed as well.