You might also consider this Q&A whose answers contain several reasons mmap might be faster, and several why it may be slower: https://stackoverflow.com/questi

You might also consider this Q&A whose answers contain several reasons mmap might be faster, and several why it may be slower: https://stackoverflow.com/questions/45972/mmap-vs-reading-blocks https://stackoverflow.com/questions/45972/mmap-vs-reading-bl...