dune runtest
 test_biniou alias test/runtest
(unit,
 None,
 Some 127,
 [ 1, 2 ],
 (shared1 -> (shared1), shared1),
 {
   #0049f062: "hello",
   #217a86c9: 123,
   #e916340c: <#00357ee6: -456>,
   #e916340d: <#003269b3>
 },
 [
   { #c8ff724b: "Francisco", #0049f4bf: 67 },
   { #c8ff724b: "Mateo", #0049f4bf: 23 },
   { #c8ff724b: "Clara", #0049f4bf: 27 },
   { #c8ff724b: "Jose", #0049f4bf: 39 }
 ],
 [
   [ 1.234567, 2.345678, 3.456789 ],
   [ 4.56789, 5.678901, 6.789012 ],
   [ 7.890123, 8.901234, 9.012345 ],
   [ 10.123456, 11.234567, 12.345678 ]
 ])
wr biniou: 6.078
wr marshal: 1.370
rd biniou: 7.093
rd marshal: 1.292