[yocto-perf] Build Perf Test Report for CentOS Linux 7 (Core)

[Yocto CentOS 7 Build Perf Tester]

Yocto build performance test report.

TEST METADATA:
==============
                      CURRENT COMMIT          COMPARING WITH      
Hostname:             ypperf-centos7          ypperf-centos7      
Branch:               master                  master              
Commit number:        51919                   51905               
Commit:               bdb49647874e18e7d603    3bbbe25ae74e120f7d34
Number of test runs:  13                      14                  

TEST RESULTS:
=============
  test1: Build core-image-sato
           build time              1:30:29  ->  1:30:33          +4.5 s   +0.1 %
           tmpdir size           33.30 GiB  ->  33.30 GiB    +382.3 kiB   +0.0 %
           rootfs size          235.30 MiB  ->  235.30 MiB     +3.3 kiB   +0.0 %
                                                                                
  test12: Build virtual/kernel
           build time               7:53.9  ->  7:52.7           -1.2 s   -0.3 %
                                                                                
  test13: Build core-image-sato with rm_work enabled
           build time              1:32:08  ->  1:32:10          +2.2 s   +0.0 %
           tmpdir size            6.49 GiB  ->  6.49 GiB      -85.5 kiB   -0.0 %
                                                                                
  test2: Run core-image-sato do_rootfs with sstate
           do_rootfs time           2:02.8  ->  2:03.0          +0.27 s   +0.2 %
                                                                                
  test3: Bitbake parsing (bitbake -p)
           parse_1 time             27.3 s  ->  27.3 s          +0.02 s   +0.1 %
           parse_2 time             17.2 s  ->  17.2 s          -0.02 s   -0.1 %
           parse_3 time              1.7 s  ->  1.7 s           -0.00 s   -0.0 %
                                                                                
  test4: eSDK metrics
           installer_bin size     1.24 GiB  ->  1.24 GiB      +21.5 kiB   +0.0 %
           deploy time              2:11.9  ->  2:11.9          -0.08 s   -0.1 %
           deploy_dir size        4.05 GiB  ->  4.05 GiB      -48.3 kiB   -0.0 %
                                                                                

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