1. A processing device comprising: an instruction execution unit; and a 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 the 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, wherein to monitor the execution, the transaction monitoring module to track a number of occurrences of each of the plurality of transactions and a number of aborts in the execution of each of the plurality of transactions; and a transaction combination module to identify, in view of the monitoring, a subset of the plurality of transactions to combine into the 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.