[R-SIG-Finance] blotter updatePortf

[Michael Chen]

I have found in running my own customized strategy using blotter and updatePortf that whether I call updatePortf after completely applying my strategy/transactions or call updatePortf at regular intervals like weekly or monthly after each period's transactions, the performance statistics are the same.  So, is there a reason that I should updatePortf regularly during a run or just wait till the end?  I am puzzled.  

Thanks,

Michael