Resumen
With the speed of individual cores no longer increasing at the rate people came to love over the past decades, programmers have to look for other ways to increase the speed of the ever-more-complicated applications. The functionality provided by the CPU manufacturers is an increased number of execution units, or CPU cores. The problem of consistency is nothing new in the world of computers. In fact, it has been central to the entire solution in one particular area: databases. The solution in the database world is transactions. One could of course regard the in-memory data a program keeps as tables corresponding to those in databases, and then just implement the same functionality. The concept of transactional memory (TM) has been defined without this restriction. TM promises to make parallel programming much easier. The concept of transaction is already present in many programs and it proved to be reasonably easy to grasp for programmers.