Why has simple threading using `threadid` become so complex in v1.12...?

General Usage Performance
6

The documentation for both OhMyThreads.jl and ChunkSplitters.jl do a great job at explaining how “simple” multithreading can work.

As an example, using ChunkSplitters.jl, you could do:

# setup
n = Threads.nthreads()
ds = mutable_datastructure()
dss = [deepcopy(ds) for _ in 1:n]
outputs = zeros(length(some_iterable))

Threads.@threads for (i, c) in enumerate(chunks(some_iterable; n=n))
    local ds = dss[i]
    for j in c
        outputs[j] = computation!(ds, j)
    end
end
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