1. A method for memory conservation during statistical static timing analysis, the method comprising: creating a timing graph with a timing run in a statistical static timing analysis program; identifying a plurality of nodes in the timing graph that are candidates for a partial store; identifying one or more of the nodes as constraint points; persistently storing timing data at constraint points; retrieving persistent timing data from the constraint points; and calculating intermediate timing data at the plurality of nodes using retrieved persistent timing data during timing analysis, wherein the timing data is selected from the group consisting of statistical distributions of arrival times (AT), statistical distributions of required arrival times (RAT), statistical distributions of slews, tightness probabilities, and combinations thereof.