[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:  7                       21                  

TEST RESULTS:
=============
  test1: Build core-image-sato
           build time             1:14:16  ->  1:18:59         +4:43.6   +6.4 %
           tmpdir size          29.82 GiB  ->  29.96 GiB   +142.96 MiB   +0.5 %
                                                                               
  test12: Build virtual/kernel
           build time              6:27.2  ->  6:26.9          -0.27 s   -0.1 %
                                                                               
  test13: Build core-image-sato with rm_work enabled
           build time             1:16:07  ->  1:20:44         +4:36.6   +6.1 %
           tmpdir size           6.15 GiB  ->  6.16 GiB     +10.97 MiB   +0.2 %
                                                                               
  test2: Run core-image-sato do_rootfs with sstate
           do_rootfs time          2:04.5  ->  2:05.0          +0.48 s   +0.4 %
                                                                               
  test3: Bitbake parsing (bitbake -p)
           parse_1 time            27.9 s  ->  27.8 s          -0.06 s   -0.2 %
           parse_2 time            17.5 s  ->  17.4 s          -0.10 s   -0.6 %
           parse_3 time             1.7 s  ->  1.7 s           -0.01 s   -0.5 %
                                                                               
  test4: eSDK metrics
           installer_bin size    1.00 GiB  ->  1.01 GiB      +1.98 MiB   +0.2 %
           deploy time             2:32.2  ->  2:32.6          +0.40 s   +0.3 %
           deploy_dir size       3.25 GiB  ->  3.26 GiB      +8.00 MiB   +0.2 %
                                                                               

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