[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:        53121                   53107               
Commit:               a7774aced031de1c8e42    ecfe26834922861ab696
Number of test runs:  7                       4                   

TEST RESULTS:
=============
  test1: Build core-image-sato
           build time              1:30:59  ->  1:31:11         +11.4 s    +0.2 %
           tmpdir size           33.72 GiB  ->  33.81 GiB    +85.55 MiB    +0.2 %
           rootfs size          239.71 MiB  ->  271.99 MiB   +32.28 MiB   +13.5 %
                                                                                 
  test12: Build virtual/kernel
           build time               7:55.9  ->  7:56.3          +0.37 s    +0.1 %
                                                                                 
  test13: Build core-image-sato with rm_work enabled
           build time              1:31:52  ->  1:32:03         +10.9 s    +0.2 %
           tmpdir size            6.43 GiB  ->  6.48 GiB     +45.48 MiB    +0.7 %
                                                                                 
  test2: Run core-image-sato do_rootfs with sstate
           do_rootfs time           2:22.9  ->  2:24.9           +1.9 s    +1.4 %
                                                                                 
  test3: Bitbake parsing (bitbake -p)
           parse_1 time             31.2 s  ->  31.8 s          +0.59 s    +1.9 %
           parse_2 time             20.4 s  ->  21.1 s          +0.73 s    +3.6 %
           parse_3 time              1.8 s  ->  1.9 s           +0.02 s    +1.0 %
                                                                                 
  test4: eSDK metrics
           installer_bin size     1.25 GiB  ->  1.26 GiB      +1.19 MiB    +0.1 %
           deploy time              2:26.0  ->  2:27.1           +1.1 s    +0.8 %
           deploy_dir size        4.14 GiB  ->  4.15 GiB      +6.73 MiB    +0.2 %
                                                                                 

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