Benchmark marshalling operation for tuples with string columns only.
* Time per operation in microseconds. Lesser is better.
* Every single char of string can be coded into 1-3 byte.


-- Multiple formats. Write row, then compact. --

Benchmark                                                              (dataSize)  (fieldsCount)  (type)  Mode  Cnt    Score   Error  Units
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost         250              2  string  avgt         1.883          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost         250             10  string  avgt         2.445          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost         250            100  string  avgt         9.964          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       64000              2  string  avgt       707.292          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       64000             10  string  avgt       666.904          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       64000            100  string  avgt       432.061          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       66000              2  string  avgt       729.053          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       66000             10  string  avgt       593.664          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       66000            100  string  avgt       343.405          us/op


-- Multiple formats. Precaclucate row size, then write. --

Benchmark                                                              (dataSize)  (fieldsCount)  (type)  Mode  Cnt     Score   Error  Units
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost         250              2  string  avgt          1.844          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost         250             10  string  avgt          2.378          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost         250            100  string  avgt         10.419          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       64000              2  string  avgt       1036.753          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       64000             10  string  avgt        944.334          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       64000            100  string  avgt        395.212          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       66000              2  string  avgt       1089.410          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       66000             10  string  avgt        925.245          us/op
TupleMarshallerVarlenOnlyBenchmark.measureTupleBuildAndMarshallerCost       66000            100  string  avgt        418.876          us/op