dongjoon-hyun commented on a change in pull request #35212:
URL: https://github.com/apache/spark/pull/35212#discussion_r785078593



##########
File path: sql/core/benchmarks/DataSourceReadBenchmark-jdk11-results.txt
##########
@@ -2,269 +2,283 @@
 SQL Single Numeric Column Scan
 
================================================================================================
 
-OpenJDK 64-Bit Server VM 11.0.13+8-LTS on Linux 5.11.0-1022-azure
-Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz
+OpenJDK 64-Bit Server VM 11.0.13+8-LTS on Linux 5.11.0-1025-azure
+Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz
 SQL Single BOOLEAN Column Scan:           Best Time(ms)   Avg Time(ms)   
Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 
------------------------------------------------------------------------------------------------------------------------
-SQL CSV                                           11834          11929         
134          1.3         752.4       1.0X
-SQL Json                                           8574           8597         
 32          1.8         545.1       1.4X
-SQL Parquet Vectorized                              116            136         
 17        135.5           7.4     102.0X
-SQL Parquet MR                                     1703           1715         
 17          9.2         108.2       7.0X
-SQL ORC Vectorized                                  172            215         
 48         91.2          11.0      68.6X
-SQL ORC MR                                         1819           1825         
  8          8.6         115.7       6.5X
-
-OpenJDK 64-Bit Server VM 11.0.13+8-LTS on Linux 5.11.0-1022-azure
-Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz
+SQL CSV                                           12783          12908         
176          1.2         812.8       1.0X
+SQL Json                                          10235          10252         
 24          1.5         650.8       1.2X
+SQL Parquet Vectorized                              129            162         
 21        122.1           8.2      99.2X
+SQL Parquet MR                                     2170           2185         
 20          7.2         138.0       5.9X
+SQL Parquet Vectorized (Delta Binary)                94            129         
 34        166.8           6.0     135.6X
+SQL Parquet MR (Delta Binary)                      2051           2056         
  8          7.7         130.4       6.2X
+SQL ORC Vectorized                                  177            234         
 47         88.8          11.3      72.2X
+SQL ORC MR                                         1589           1606         
 24          9.9         101.0       8.0X
+
+OpenJDK 64-Bit Server VM 11.0.13+8-LTS on Linux 5.11.0-1025-azure
+Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz
 Parquet Reader Single BOOLEAN Column Scan:  Best Time(ms)   Avg Time(ms)   
Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 
-------------------------------------------------------------------------------------------------------------------------
-ParquetReader Vectorized                             117            126        
  17        134.9           7.4       1.0X
-ParquetReader Vectorized -> Row                       47             49        
   3        336.5           3.0       2.5X
+ParquetReader Vectorized                              99            115        
  15        158.8           6.3       1.0X
+ParquetReader Vectorized -> Row                       46             51        
   4        345.0           2.9       2.2X
 
-OpenJDK 64-Bit Server VM 11.0.13+8-LTS on Linux 5.11.0-1022-azure
-Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz
+OpenJDK 64-Bit Server VM 11.0.13+8-LTS on Linux 5.11.0-1025-azure
+Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz
 SQL Single TINYINT Column Scan:           Best Time(ms)   Avg Time(ms)   
Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 
------------------------------------------------------------------------------------------------------------------------
-SQL CSV                                           13434          13590         
220          1.2         854.1       1.0X
-SQL Json                                          10056          10073         
 24          1.6         639.3       1.3X
-SQL Parquet Vectorized                              212            229         
 12         74.3          13.5      63.4X
-SQL Parquet MR                                     1883           1916         
 47          8.4         119.7       7.1X
-SQL ORC Vectorized                                  200            241         
 30         78.8          12.7      67.3X
-SQL ORC MR                                         1529           1549         
 28         10.3          97.2       8.8X
-
-OpenJDK 64-Bit Server VM 11.0.13+8-LTS on Linux 5.11.0-1022-azure
-Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz
+SQL CSV                                           15867          15952         
120          1.0        1008.8       1.0X
+SQL Json                                          11170          11203         
 47          1.4         710.2       1.4X
+SQL Parquet Vectorized                              147            174         
 39        106.7           9.4     107.6X
+SQL Parquet MR                                     2352           2361         
 12          6.7         149.6       6.7X
+SQL Parquet Vectorized (Delta Binary)               146            172         
 27        108.0           9.3     109.0X
+SQL Parquet MR (Delta Binary)                      2139           2169         
 43          7.4         136.0       7.4X
+SQL ORC Vectorized                                  175            225         
 51         90.1          11.1      90.9X
+SQL ORC MR                                         1566           1588         
 31         10.0          99.6      10.1X
+
+OpenJDK 64-Bit Server VM 11.0.13+8-LTS on Linux 5.11.0-1025-azure
+Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz
 Parquet Reader Single TINYINT Column Scan:  Best Time(ms)   Avg Time(ms)   
Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 
-------------------------------------------------------------------------------------------------------------------------
-ParquetReader Vectorized                             229            254        
  13         68.6          14.6       1.0X
-ParquetReader Vectorized -> Row                      162            171        
  14         96.9          10.3       1.4X
+ParquetReader Vectorized                             175            190        
  13         89.8          11.1       1.0X
+ParquetReader Vectorized -> Row                       96            108        
  17        163.6           6.1       1.8X
 
-OpenJDK 64-Bit Server VM 11.0.13+8-LTS on Linux 5.11.0-1022-azure
-Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz
+OpenJDK 64-Bit Server VM 11.0.13+8-LTS on Linux 5.11.0-1025-azure
+Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz
 SQL Single SMALLINT Column Scan:          Best Time(ms)   Avg Time(ms)   
Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 
------------------------------------------------------------------------------------------------------------------------
-SQL CSV                                           14320          14476         
221          1.1         910.4       1.0X
-SQL Json                                           9769          10067         
423          1.6         621.1       1.5X
-SQL Parquet Vectorized                              187            228         
 28         84.3          11.9      76.8X
-SQL Parquet MR                                     2230           2240         
 14          7.1         141.8       6.4X
-SQL ORC Vectorized                                  221            265         
 36         71.1          14.1      64.8X
-SQL ORC MR                                         1763           1779         
 23          8.9         112.1       8.1X
-
-OpenJDK 64-Bit Server VM 11.0.13+8-LTS on Linux 5.11.0-1022-azure
-Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz
+SQL CSV                                           16787          17659        
1234          0.9        1067.3       1.0X
+SQL Json                                          11373          11520         
209          1.4         723.1       1.5X
+SQL Parquet Vectorized                              205            259         
 26         76.6          13.0      81.8X
+SQL Parquet MR                                     2673           2698         
 35          5.9         169.9       6.3X
+SQL Parquet Vectorized (Delta Binary)               252            291         
 38         62.5          16.0      66.7X

Review comment:
       This looks like a regression from `81x` to `66x`. Is this expected?




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