[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:        51776                   51764               
Commit:               7bf0d815877c441a9273    5679b31bcf34cc3659a8
Number of test runs:  7                       1                   

TEST RESULTS:
=============
  test1: Build core-image-sato
                                                               
  test12: Build virtual/kernel
           build time     7:54.6  ->  7:51.8    -2.7 s   -0.6 %
                                                               
  test13: Build core-image-sato with rm_work enabled
                                                               
  test2: Run core-image-sato do_rootfs with sstate
                                                               
  test3: Bitbake parsing (bitbake -p)
           parse_1 time   27.6 s  ->  27.2 s   -0.34 s   -1.2 %
           parse_2 time   17.1 s  ->  17.0 s   -0.13 s   -0.8 %
           parse_3 time    1.7 s  ->  1.7 s    +0.01 s   +0.6 %
                                                               
  test4: eSDK metrics
                                                               

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