I've observed that --param name=value type of options are having default, min, max values but not all. eg. max-goto-duplication-insns has default 8 but max-delay-slot-insn-search has none. My problem is: 1. Do all parameter have limits and defaults? 2. If yes why they are not documented? 3. If no how to find the best values? Regard, vikram -- View this message in context: http://old.nabble.com/GCC-parameter-optimisation-help-tp33037405p33037405.html Sent from the gcc - Help mailing list archive at Nabble.com.