[petsc-users] Using -ipo, -fast or -O3 during compilation of PETSc

[TAY wee-beng]

Hi,

May I know if it is advisable to use -ipo, -fast or -O3 during 
compilation of PETSc for the non debug mode?

Will it be faster or will there be unpredictable errors?

Thanks!

-- 
Yours sincerely,

TAY wee-beng