Revert "small change in sin_optim for running benchmark"

This reverts commit 297a57445a84fa3f172b6e66cde3df911f5b0842.
Revert "Revert "small change in sin_optim for running benchmark""

This reverts commit 58c46ab925f3a14be10334f6c7204187adbbb169.
Merge branch 'master' of github.com:vlsd/nlsymb
Merge branch 'master' of github.com:vlsd/nlsymb
Merge branch 'master' of github.com:vlsd/nlsymb
Merge branch 'master' of github.com:vlsd/nlsymb
the winning configuration