8 00:00:00.01 .000000005 9 00:00:00.01 .0000000000000000000000000000005 31 00:00:00.01 So, that's one function down, 12 more to go when considering sin, cos, tan, exp and other transcendental functions included in Oracle. In Closing Three performance factors to consider when coding your RDBMS's built-in functions are speed, convergence, and accuracy. A fast function