[do_not_redeem]

Even if the file is cached, fread has to do a memcpy. mmap doesn't.

[gpderetta]

fread is (usually) buffered io, so it actually does two additional mem copies (kernel to FILE buffer then to user buffer)

[assbuttbuttass]

Not in Go

[gpderetta]

oh, right, this is Go (https://pkg.go.dev/github.com/odeke-em/go-utils/fread#sectio...). Do the strings it return share memory with the internal buffer?