Clojurians Log v2

Any idea why thread is slower than go blocks

?

Grab a copy of yourkit and profile it.

That is a meaningless question

@alexmiller what am I missing?

Everything? I’m not even sure where to start

This code is nonsensical. Starting from an actual meaningful problem would be a good first step.

I am trying to come up with a simple code snippet that demonstrates how go blocks work

thread and go are for different purposes, and that is a more meaningful decision dimension than perf

I know that

My purpose is didactic

Then start from a meaningful problem

I did that

What is it?

Writing in parallel to a db

We’ll go blocks shouldn’t block, so that’s a bad problem to demonstrate go blocks

I know

I don’t know how to help you

Can you think of a simple way to demonstrate that go blocks don’t have a perfomance hit?

Go blocks are a process and communication tool. They are about organizing the running parts of your program. Performance is not imo a concern that enters that equation

Spawn threads is slower then "spawn" go blocks

(time 
  (dotimes [i 1e6]
    (async/go i)))
"Elapsed time: 476.882375 msecs"
=> nil
(time 
  (dotimes [i 1e6]
    (async/thread i)))
"Elapsed time: 1285.235322 msecs"