fix reorder_unknowns

[baggepinnen]

Close #3814

[github-actions]

Benchmark Results (Julia vlts)

Time benchmarks

	master	73227f0...	master / 73227f0...
ODEProblem	0.0843 ± 0.0058 s	0.0843 ± 0.0055 s	0.999 ± 0.095
init	0.0613 ± 0.0019 ms	0.062 ± 0.0018 ms	0.988 ± 0.042
large_parameter_init/ODEProblem	0.706 ± 0.0048 s	0.716 ± 0.0041 s	0.986 ± 0.0087
large_parameter_init/init	0.112 ± 0.0025 ms	0.112 ± 0.0022 ms	0.999 ± 0.03
mtkcompile	0.0349 ± 0.0014 s	0.0351 ± 0.00093 s	0.996 ± 0.048
time_to_load	5.62 ± 0.017 s	5.75 ± 0.034 s	0.977 ± 0.0065

Memory benchmarks

	master	73227f0...	master / 73227f0...
ODEProblem	0.588 M allocs: 20.1 MB	0.588 M allocs: 20 MB	1
init	0.908 k allocs: 0.0479 MB	0.908 k allocs: 0.0479 MB	1
large_parameter_init/ODEProblem	4.62 M allocs: 0.178 GB	4.64 M allocs: 0.179 GB	0.998
large_parameter_init/init	1.75 k allocs: 0.0874 MB	1.75 k allocs: 0.0874 MB	1
mtkcompile	0.233 M allocs: 8.64 MB	0.233 M allocs: 8.64 MB	1
time_to_load	0.153 k allocs: 14.5 kB	0.153 k allocs: 14.5 kB	1

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	master	73227f0...	master / 73227f0...
ODEProblem	0.0796 ± 0.0043 s	0.0791 ± 0.0031 s	1.01 ± 0.067
init	0.0489 ± 0.012 ms	0.0571 ± 0.012 ms	0.857 ± 0.27
large_parameter_init/ODEProblem	0.729 ± 0.025 s	0.706 ± 0.018 s	1.03 ± 0.045
large_parameter_init/init	0.1 ± 0.011 ms	0.1 ± 0.012 ms	0.999 ± 0.16
mtkcompile	0.034 ± 0.00067 s	0.0335 ± 0.00041 s	1.02 ± 0.024
time_to_load	5.79 ± 0.062 s	5.7 ± 0.011 s	1.02 ± 0.011

Memory benchmarks

	master	73227f0...	master / 73227f0...
ODEProblem	0.579 M allocs: 18.9 MB	0.578 M allocs: 18.8 MB	1
init	0.815 k allocs: 0.0318 MB	0.815 k allocs: 0.0318 MB	1
large_parameter_init/ODEProblem	4.71 M allocs: 0.171 GB	4.68 M allocs: 0.169 GB	1.01
large_parameter_init/init	1.66 k allocs: 0.0712 MB	1.66 k allocs: 0.0712 MB	1
mtkcompile	0.233 M allocs: 8.08 MB	0.232 M allocs: 8.07 MB	1
time_to_load	0.159 k allocs: 11.2 kB	0.159 k allocs: 11.2 kB	1