SSIS派生列与SQL更新性能

I am trying to determine which is faster in a SSIS package. I have multiple (100's) csv files that have about 150 columns of scientific precision data (38,20) for different types of scenarios. The table is layed out the same way with some other columns. The data sometimes comes in with whitespace/empty data and I have to change this to null for a data conversion at a later time.I am trying to determine which is faster in a S