[stingraycharles]

In our experience building a high performance database server: absolutely. If your line of thinking is “if you have enough free memory”, then these types of optimizations aren’t for you. one of the main benefits is eliminating an extra copy.

additionally, mmap is heavily optimized for random access, so if that’s what you’re doing, then you’ll have a much better time with it than fread.

(I hope a plug is not frowned upon here: if you like this kind of stuff, we’re a fully remote company and hiring C++ devs: https://apply.workable.com/quasar/j/436B0BEE43/ )