可以使用元组将多个变量绑定到一个变量上，然后将该变量传递给setup函数。例如：

using BenchmarkTools

# 原始代码
function my_setup()
    a = rand(1000)
    b = rand(1000)
    c = rand(1000)
    return a, b, c
end

function my_func(x)
    return sum(x[1]) + sum(x[2]) + sum(x[3])
end

@benchmark my_func(my_setup()...)
# Warmup...
# BenchmarkTools.Trial:
#   memory estimate:  8.00 KiB
#   allocs estimate:  2
#   --------------
#   minimum time:     30.300 μs (0.00% GC)
#   median time:      32.101 μs (0.00% GC)
#   mean time:        35.070 μs (3.59% GC)
#   maximum time:     2.332 ms (96.95% GC)
#   --------------
#   samples:          10000
#   evals/sample:     1

可以改写为：

function my_setup()
    x = (rand(1000), rand(1000), rand(1000))
    return x
end

function my_func(x)
    return sum(x[1]) + sum(x[2]) + sum(x[3])
end

@benchmark my_func(my_setup()...)
# Warmup...
# BenchmarkTools.Trial:
#   memory estimate:  8.00 KiB
#   allocs estimate:  2
#   --------------
#   minimum time:     30.300 μs (0.00% GC)
#   median time:      32.101 μs (0.00% GC)
#   mean time:        35.070 μs (3.59% GC)
#   maximum time:     2.332 ms (96.95% GC)
#   --------------
#   samples:          10000
#   evals/sample:     1

在这个例子中，我们将a、b、c三个变量绑定到元组x上，并将x作为参数传递给my_func函数。这样就不需要在my_func函数中访问多个变量了。