mmap

Load file-backed memory.
Uses edsrzf/mmap-go under the hood.

Installing

go get -u github.com/tidwall/mmap

Using

Load a bigole file into a byte slice. This happens pretty much instantly even if your file is many GBs.

data, err := mmap.Open("my-big-file.txt", false)
if err != nil {
    panic(err)
}

Now you can read the data slice like any other Go slice.

Make sure to release the data when your done.

mmap.Close(data)

Don't read the data after closing otherwise your f*cked.

That's all, bye now