Understanding data movement with Distributed.jl

[lmtzx9h4qqnt]

Regarding the question of why “named” functions behave differently from anonymous functions for serialization, I just came across this post in a different thread:

`foo = () -> 3` vs. `foo() = 3`

Just for completeness, another small difference is how they’re serialized. For the anonymous version, the function definition is actually serialized, where as the non-anonymous one just the name is serialized. The niche place where this might come up is when using Distributed’s auto-global shipping, so e.g. this works, foo = () -> 3 @fetch foo() # foo definition shipped to worker, run there, answer returned whereas the non-anonymous version you need to have foo actually defined on all workers …