[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:        48583                   48562               
Commit:               364f8bcfcbd04e722490    205cfd702190026e64ee
Number of test runs:  4                       12                  

TEST RESULTS:
=============
  test1: Build core-image-sato
           build time             1:19:26  ->  1:18:46         -39.8 s   -0.8 %
           tmpdir size          30.02 GiB  ->  29.78 GiB   -240.87 MiB   -0.8 %
                                                                               
  test12: Build virtual/kernel
           build time              6:32.1  ->  6:32.0          -0.12 s   -0.0 %
                                                                               
  test13: Build core-image-sato with rm_work enabled
           build time             1:21:10  ->  1:20:31         -38.8 s   -0.8 %
           tmpdir size           5.89 GiB  ->  5.87 GiB     -15.57 MiB   -0.3 %
                                                                               
  test2: Run core-image-sato do_rootfs with sstate
           do_rootfs time          2:05.2  ->  2:05.4          +0.24 s   +0.2 %
                                                                               
  test3: Bitbake parsing (bitbake -p)
           parse_1 time            27.5 s  ->  27.7 s          +0.24 s   +0.9 %
           parse_2 time            17.2 s  ->  17.3 s          +0.13 s   +0.7 %
           parse_3 time             1.7 s  ->  1.7 s           +0.01 s   +0.8 %
                                                                               
  test4: eSDK metrics
           installer_bin size    1.01 GiB  ->  1.01 GiB      -7.81 MiB   -0.8 %
           deploy time             2:32.5  ->  2:33.2          +0.73 s   +0.5 %
           deploy_dir size       3.28 GiB  ->  3.26 GiB     -19.47 MiB   -0.6 %
                                                                               

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