Async and detect slow

[hungpham3112]

Sometimes when I edit Rust file it reports a red message( It really good ) but after correct, it takes a while to index or detect so that really annoying and uncomfortable.

Can it be index fast like clangd?

I use coc-rls to support for coc.nvim. I thought it is an issue with coc-rls but they answered me that the slow performance is caused by rust-lang-server. The answer is here.