Rust Vector for large amounts of data, that does not copy when growing, by using full mmap'd pages.

I made ths to learn about mmap.

This is a first draft, testing out my idea. I copied the doctests from alloc::vec::Vec and they all pass.

I only have one test, where it grows until the virtual address changes , and data still look good.

• On shrinking, madvise(MADV_FREE)
• Performance Test

Creating huge vectors does not increase the memory usage immediately. The following line only makes the OS assign 8GB of virtual address in the Process.

let mut vec = LVec::<usize>::with_capacity(1024 * 1000 * 1000);

physical memory is only allocated when you actually use the page.

The same is true for alloc::vec::Vec, so it does not seem that this crate provides any benefit over standard vector.

Licensed under either of

• Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)

• MIT license (http://opensource.org/licenses/MIT)

at your option.