Error from closure definition inside @batch

General Usage
1

I am trying to use the @batch from Polyester.jl as an alternative to the Base.Threads.@threads but inside my loops I need to define some closures which produced an UndefVarError. A MWE is the following

function func()
    @batch for i in 1:5
        f(x)=x
    end
end
func()

will produce:

ERROR: UndefVarError: `x` not defined
Stacktrace:
 [1] macro expansion
   @ ~/.julia/packages/Polyester/HaBfT/src/closure.jl:387 [inlined]
 [2] func()
   @ Main ./REPL[90]:2
 [3] top-level scope
   @ REPL[91]:1
 [4] top-level scope
   @ ~/.julia/juliaup/julia-1.10.0+0.x64.linux.gnu/share/julia/stdlib/v1.10/REPL/src/REPL.jl:1428

Is there a workaround or its a case that I cannot use @batch

2

Try @floop from Floops.jl

3

@floop doesn’t have the above issue but has the same overhead as @threads. I wanted to use @batch in order to reduce my overhead.
Is it possible to spawn a threadpool and then just pass it tasks? So that I can preallocate the threadpool