[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:        49988                   49953               
Commit:               5479654eeaaa0f81bfff    f4c938c47424424b89cd
Number of test runs:  2                       7                   

TEST RESULTS:
=============
  test1: Build core-image-sato
           build time              1:19:18  ->  1:19:50          +32.4 s   +0.7 %
           tmpdir size           30.34 GiB  ->  30.44 GiB    +103.78 MiB   +0.3 %
           rootfs size          224.72 MiB  ->  226.57 MiB     +1.85 MiB   +0.8 %
                                                                                 
  test12: Build virtual/kernel
           build time               7:05.9  ->  7:05.7           -0.26 s   -0.1 %
                                                                                 
  test13: Build core-image-sato with rm_work enabled
           build time              1:20:59  ->  1:21:26          +26.6 s   +0.5 %
           tmpdir size            5.96 GiB  ->  5.97 GiB      +12.36 MiB   +0.2 %
                                                                                 
  test2: Run core-image-sato do_rootfs with sstate
           do_rootfs time           1:59.1  ->  1:59.2           +0.13 s   +0.1 %
                                                                                 
  test3: Bitbake parsing (bitbake -p)
           parse_1 time             26.6 s  ->  26.4 s           -0.13 s   -0.5 %
           parse_2 time             16.5 s  ->  16.5 s           +0.01 s   +0.1 %
           parse_3 time              1.7 s  ->  1.7 s            -0.00 s   -0.3 %
                                                                                 
  test4: eSDK metrics
           installer_bin size     1.01 GiB  ->  1.02 GiB       +3.30 MiB   +0.3 %
           deploy time              2:08.0  ->  2:08.7           +0.74 s   +0.6 %
           deploy_dir size        3.40 GiB  ->  3.41 GiB       +9.60 MiB   +0.3 %
                                                                                 

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