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Add 2 columns and drop 2 columns at 3 different depths of nesting
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OpenJDK 64-Bit Server VM 1.8.0_362-b09 on Linux 5.15.0-1031-azure
Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz
Add 2 columns and drop 2 columns at 3 different depths of nesting:  Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
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To non-nullable StructTypes using performant method                            6              8           3          0.0      Infinity       1.0X
To nullable StructTypes using performant method                                4              5           2          0.0      Infinity       1.4X
To non-nullable StructTypes using non-performant method                       68             73           5          0.0      Infinity       0.1X
To nullable StructTypes using non-performant method                         2223           2452         324          0.0      Infinity       0.0X


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Add 50 columns and drop 50 columns at 100 different depths of nesting
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OpenJDK 64-Bit Server VM 1.8.0_362-b09 on Linux 5.15.0-1031-azure
Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz
Add 50 columns and drop 50 columns at 100 different depths of nesting:  Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
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To non-nullable StructTypes using performant method                             3126           3150          34          0.0      Infinity       1.0X
To nullable StructTypes using performant method                                 3136           4768        2309          0.0      Infinity       1.0X


