[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:        52121                   52109               
Commit:               52f1041e1a99d391d954    4ef016683d986cc5291e
Number of test runs:  4                       2                   

TEST RESULTS:
=============
  test1: Build core-image-sato
           build time              1:31:02  ->  1:31:10          +8.3 s   +0.2 %
           tmpdir size           33.34 GiB  ->  33.34 GiB    -352.0 kiB   -0.0 %
           rootfs size          235.28 MiB  ->  235.28 MiB     +4.0 kiB   +0.0 %
                                                                                
  test12: Build virtual/kernel
           build time               7:50.8  ->  7:51.6          +0.81 s   +0.2 %
                                                                                
  test13: Build core-image-sato with rm_work enabled
           build time              1:32:30  ->  1:32:15         -14.9 s   -0.3 %
           tmpdir size            6.49 GiB  ->  6.49 GiB     +184.0 kiB   +0.0 %
                                                                                
  test2: Run core-image-sato do_rootfs with sstate
           do_rootfs time           2:17.0  ->  2:17.4          +0.33 s   +0.2 %
                                                                                
  test3: Bitbake parsing (bitbake -p)
           parse_1 time             28.7 s  ->  28.9 s          +0.15 s   +0.5 %
           parse_2 time             18.6 s  ->  18.5 s          -0.08 s   -0.4 %
           parse_3 time              1.8 s  ->  1.7 s           -0.03 s   -1.6 %
                                                                                
  test4: eSDK metrics
           installer_bin size     1.24 GiB  ->  1.24 GiB      -33.8 kiB   -0.0 %
           deploy time              2:15.2  ->  2:16.0          +0.78 s   +0.6 %
           deploy_dir size        4.05 GiB  ->  4.05 GiB      -29.8 kiB   -0.0 %
                                                                                

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