1. A computer-implemented method, including: preparing a graph-based computation having a plurality of nodes representing graph components connected by one or more links representing data flows between the graph components, including: identifying at least a first set of graph components to process a plurality of transactions in the computation; and associating with a first transaction a first group of one or more data records and data operations corresponding to the data records, and associating with a second transaction a second group of one or more data records and data operations corresponding to the data records; and executing the graph-based computation to process at least the first and second transactions, including delaying execution by the first set of graph components of a data operation corresponding to an initial data record of the second group until after execution by the first set of graph components of a data operation corresponding to a final data record of the first group.