[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:        48649                   48626               
Commit:               cf75fd5ae07355951b1f    d7cf7d6d032158690d65
Number of test runs:  3                       6                   

TEST RESULTS:
=============
  test1: Build core-image-sato
           build time             1:18:37  ->  1:18:52         +15.3 s   +0.3 %
           tmpdir size          29.78 GiB  ->  30.12 GiB   +341.12 MiB   +1.1 %
                                                                               
  test12: Build virtual/kernel
           build time              6:32.6  ->  6:31.7          -0.86 s   -0.2 %
                                                                               
  test13: Build core-image-sato with rm_work enabled
           build time             1:20:26  ->  1:20:31          +4.8 s   +0.1 %
           tmpdir size           5.87 GiB  ->  5.91 GiB     +40.96 MiB   +0.7 %
                                                                               
  test2: Run core-image-sato do_rootfs with sstate
           do_rootfs time          2:05.3  ->  2:05.4          +0.17 s   +0.1 %
                                                                               
  test3: Bitbake parsing (bitbake -p)
           parse_1 time            27.6 s  ->  27.6 s          +0.08 s   +0.3 %
           parse_2 time            17.3 s  ->  17.3 s          -0.01 s   -0.1 %
           parse_3 time             1.7 s  ->  1.7 s           -0.00 s   -0.1 %
                                                                               
  test4: eSDK metrics
           installer_bin size    1.01 GiB  ->  1.01 GiB      +9.07 MiB   +0.9 %
           deploy time             2:33.0  ->  2:33.5          +0.53 s   +0.3 %
           deploy_dir size       3.26 GiB  ->  3.31 GiB     +51.09 MiB   +1.5 %
                                                                               

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