Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
As part of implementing a half-life behaviour, I need to perform x = x – x / 128 on around a hundred thousand rows every few days. Is tsql smart enough to do the division by 128 efficiently (as a bit-shift), or is it just as efficient to divide by 130?
If tsql isn’t smart enough, is there anything clever that I can do to make it more efficient?
A hundred thousand rows isn’t enough that the difference in perf between a divide operation and a shift operation would probably even be measurable. Especially if you only have to do it every few days. Better to spend your time worrying about other issues.