Regression on number of allocations in GC micro-benchmark about julia

[KristofferC]

1c25d93 is the cause of 2M alloc -> 4M alloc at least (but it doesn't seem to have that much of a perf impact)

~/julia$ manyjulias $(git rev-parse HEAD) -t8 testit.jl 
Extracted 'julia-1_12_0-DEV_0:1c25d93ca8ab3f5b0cad627d76705fb7025429a3'
  9.980486 seconds (3.81 M allocations: 29.817 GiB, 31.02% gc time, 51.06% compilation time: 74% of which was recompilation)

~/julia$ manyjulias $(git rev-parse HEAD)~1 -t8 testit.jl 
Extracted 'julia-1_12_0-DEV_0:c0a93f8c3ef20fe9f892e1a728409c60599657cc'
  9.533646 seconds (1.99 M allocations: 29.789 GiB, 30.31% gc time, 48.24% compilation time)

It's a perhaps bit surprising that the one with the slower compilation has recompilation while the previous one do not.

cc @Keno

[KristofferC]

While it is unfortunate with a perf regression I don't think it really warrants being on the milestone.