See also <a href="https://github.com/JuliaLang/julia/pull/50137">https://github.com/JuliaLang/julia/pull/50137</a> and <a href="https://github.com/JuliaLang/julia/pull/50013">https://github.com/JuliaLang/julia/pull/50013</a> that improve the sweeping (the linked PR is only the mark phase)