[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:        52799                   52782               
Commit:               ad4bdc680a2eb28b1bc6    801745d918e83f976c70
Number of test runs:  4                       15                  

TEST RESULTS:
=============
  test1: Build core-image-sato
           build time              1:32:46  ->  1:30:35          -2:10.8   -2.4 %
           tmpdir size           33.91 GiB  ->  33.46 GiB    -464.47 MiB   -1.3 %
           rootfs size          240.93 MiB  ->  240.95 MiB     +21.1 kiB   +0.0 %
                                                                                 
  test12: Build virtual/kernel
           build time               7:55.8  ->  7:54.7            -1.1 s   -0.2 %
                                                                                 
  test13: Build core-image-sato with rm_work enabled
           build time              1:33:37  ->  1:31:16          -2:21.2   -2.5 %
           tmpdir size            6.58 GiB  ->  6.40 GiB     -184.60 MiB   -2.7 %
                                                                                 
  test2: Run core-image-sato do_rootfs with sstate
           do_rootfs time           2:22.0  ->  2:21.5           -0.48 s   -0.3 %
                                                                                 
  test3: Bitbake parsing (bitbake -p)
           parse_1 time             30.0 s  ->  29.7 s           -0.28 s   -0.9 %
           parse_2 time             19.9 s  ->  19.7 s           -0.18 s   -0.9 %
           parse_3 time              1.8 s  ->  1.8 s            -0.01 s   -0.3 %
                                                                                 
  test4: eSDK metrics
           installer_bin size     1.25 GiB  ->  1.25 GiB      +211.5 kiB   +0.0 %
           deploy time              2:24.6  ->  2:24.6           +0.02 s   +0.0 %
           deploy_dir size        4.12 GiB  ->  4.12 GiB       -42.3 kiB   -0.0 %
                                                                                 

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