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Tagged In performance calculation :

A specific trick and a general habit for achieving fast computations

December 15, 2016

I recently worked on a computation involved in a client-facing projection graph. In order to delight our users, we wanted it to respond instantly to user interaction. However, there are two forces at play that make the calculation complicated: the consistent contributions of recurring deposits and the erratic motion of stock prices. We needed to… Read more

How to Make Your Persistent Queues Run Faster Safely

May 04, 2016

What is a Persistent Queue? A persistent queue is a list of objects that persist in the database waiting to be polled and processed in some way. Usually it is a table that has columns for data, timestamp of when the object persisted, and timestamp of when the object is polled. As opposed to an… Read more

What’s your stock portfolio return?

March 03, 2011

Consider the following scenario: you invest your money starting with $100K in a brokerage account, and buy some AAPL shares at $200. Then you transfer $5K more into the account and buy some AMZN shares at $120. Later on you sell your APPL shares when it reaches $300. In the end you transfer $10K out… Read more

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