I feel that 11.10 boots very slow on my netbook. Many people said that changing concurrency method to shell in /etc/init.d/rc
will speed up boot process, but the comment in the file said that the valid options of concurrency are 'none' and 'makefile', and the concurrency method since 2010-05-14 was makefile.
What are the differences between both? Is shell concurrency method still used until now?
none
will run all services sequentially, whilemakefile
will run at the same time services with the same "precedence"