A method for executing a transaction for a processor associated with a persistent memory and with a cache memory, the cache memory comprising cache lines associated with respective states, including:



if a cache line is associated with a state allowing data to be copied directly:
copying data to the cache line;
associating the line with a state representative of an allocation to transaction data;
otherwise:
flushing lines associated with a state representative of an allocation to external data and associating them with a state indicating that content of the lines has not been modified;
copying data to the flushed lines;
associating these lines with a state representative of an allocation to transaction data.