1. A processing device comprising: an instruction execution unit; and track and combine logic to combine a plurality of transactions into a single combined transaction, the track and combine logic comprising: a transaction monitoring module to monitor an execution of a plurality of transactions by the instruction execution unit, each of the plurality of transactions comprising a transaction begin instruction, at least one operation instruction and a transaction end instruction; and a transaction combination module to identify, in view of the monitoring, a subset of the plurality of transactions to combine into a single combined transaction for execution on the processing device and to combine the identified subset of the plurality of transactions into the single combined transaction, the single combined transaction comprising a single transaction begin instruction, a plurality of operation instructions corresponding to the subset of the plurality of transactions and a single transaction end instruction.