[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:        49517                   49478               
Commit:               0fd6d0dd0041929d6011    04575dfdbc6997666c23
Number of test runs:  2                       10                  

TEST RESULTS:
=============
  test1: Build core-image-sato
           build time             1:21:10  ->  1:20:00         -1:09.6    -1.4 %
           tmpdir size          34.19 GiB  ->  30.93 GiB     -3.27 GiB    -9.6 %
                                                                                
  test12: Build virtual/kernel
           build time              9:05.0  ->  7:05.6          -1:59.5   -21.9 %
                                                                                
  test13: Build core-image-sato with rm_work enabled
           build time             1:23:15  ->  1:21:31         -1:43.4    -2.1 %
           tmpdir size           9.30 GiB  ->  6.08 GiB      -3.22 GiB   -34.6 %
                                                                                
  test2: Run core-image-sato do_rootfs with sstate
           do_rootfs time          2:03.9  ->  2:02.8           -1.1 s    -0.9 %
                                                                                
  test3: Bitbake parsing (bitbake -p)
           parse_1 time            27.7 s  ->  27.5 s          -0.18 s    -0.7 %
           parse_2 time            17.3 s  ->  17.3 s          +0.00 s    +0.0 %
           parse_3 time             1.7 s  ->  1.7 s           +0.00 s    +0.1 %
                                                                                
  test4: eSDK metrics
           installer_bin size    1.24 GiB  ->  1.05 GiB    -203.20 MiB   -15.9 %
           deploy time             2:33.1  ->  2:30.0           -3.1 s    -2.1 %
           deploy_dir size       3.90 GiB  ->  3.51 GiB    -407.81 MiB   -10.2 %
                                                                                

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