> There is no description of what the PR does which is pretty bad form. The description is in the first paragraph of the PR body text: > This PR adds support

> There is no description of what the PR does which is pretty bad form. The description is in the first paragraph of the PR body text: > This PR adds support for shared-memory parallelism through domains and direct-style concurrency through effect handlers (without syntactic support). It intends to have backwards compatibility in terms of language features, C API, and also the performance of single-threaded code.