[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:        48393                   48346               
Commit:               370483fce1c2429c81b1    b73e96e7f3f5d1ba3a22
Number of test runs:  4                       21                  

TEST RESULTS:
=============
  test1: Build core-image-sato
           build time             1:14:16  ->  1:18:58         +4:42.3   +6.3 %
           tmpdir size          29.82 GiB  ->  29.96 GiB   +143.17 MiB   +0.5 %
                                                                               
  test12: Build virtual/kernel
           build time              6:27.2  ->  6:26.3          -0.86 s   -0.2 %
                                                                               
  test13: Build core-image-sato with rm_work enabled
           build time             1:16:07  ->  1:20:45         +4:37.7   +6.1 %
           tmpdir size           6.15 GiB  ->  6.16 GiB     +10.66 MiB   +0.2 %
                                                                               
  test2: Run core-image-sato do_rootfs with sstate
           do_rootfs time          2:04.5  ->  2:05.1          +0.61 s   +0.5 %
                                                                               
  test3: Bitbake parsing (bitbake -p)
           parse_1 time            27.9 s  ->  27.9 s          -0.02 s   -0.1 %
           parse_2 time            17.5 s  ->  17.4 s          -0.07 s   -0.4 %
           parse_3 time             1.7 s  ->  1.7 s           -0.01 s   -0.3 %
                                                                               
  test4: eSDK metrics
           installer_bin size    1.00 GiB  ->  1.01 GiB      +1.88 MiB   +0.2 %
           deploy time             2:32.2  ->  2:32.4          +0.26 s   +0.2 %
           deploy_dir size       3.25 GiB  ->  3.26 GiB      +7.79 MiB   +0.2 %
                                                                               

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