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projection on wide table
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OpenJDK 64-Bit Server VM 1.8.0_191-b12 on Linux 3.10.0-862.3.2.el7.x86_64
Intel(R) Xeon(R) CPU E5-2670 v2 @ 2.50GHz
projection on wide table:                Best/Avg Time(ms)    Rate(M/s)   Per Row(ns)   Relative
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split threshold 10                          40571 / 40937          0.0       38691.7       1.0X
split threshold 100                         31116 / 31669          0.0       29674.6       1.3X
split threshold 1024                        10077 / 10199          0.1        9609.7       4.0X
split threshold 2048                          8654 / 8692          0.1        8253.2       4.7X
split threshold 4096                          8006 / 8038          0.1        7634.7       5.1X
split threshold 8192                          8069 / 8107          0.1        7695.3       5.0X
split threshold 65536                       56973 / 57204          0.0       54333.7       0.7X


