Abstract: A method executed by a processor in a computer including the processor and memory includes: trying to allocate a block of the memory by the processor at a request for memory allocation, in a first case in which a result of a judgment on a probability of success or failure of the memory allocation based on a time taken for the processor to perform each of one or more specific procedures indicates that there is a high probability that the memory allocation succeeds; and either trying to allocate the block of the memory by the processor with a delay with respect to the first case, or returning by the processor, without trying to allocate the block of the memory, a reply that the memory allocation has failed, in a second case in which the result of the judgment indicates that there is a high probability that the memory allocation fails.