• add struct ThreadPoolBuilder

• add ThreadPoolBuilder fn new()
  • uses num_cpu crate to default num of threads to num of cpus

• remove: ThreadPool fn new(num_threads: usize) -> ThreadPool
• add: ThreadPool fn new() -> ThreadPool
  • uses num_cpu to default num of threads to num of cpus
• add: ThreadPoolBuilder fn num_threads(self, num: usize) -> ThreadPoolBuilder
  • set the number of threads for the pool that the builder will construct

• remove: ThreadPool fn with_name(name: String, num_threads: usize) -> ThreadPool
• add: ThreadPoolBuilder fn name(self, name: String) -> ThreadPoolBuilder

• add: ThreadPoolBuilder fn stack_size(self, size: usize) -> ThreadPoolBuilder
  • https://doc.rust-lang.org/std/thread/struct.Builder.html#method.stack_size

In summary: remove all constructors off of ThreadPool, except a new new constructor. If you want to fine-tune your threadpool, you'd use a ThreadPoolBuilder.