Speedup MET significance calculation [94X]

[kpedro88]

backport of #24135
(primarily for analysis use)

[cmsbuild]

A new Pull Request was created by @kpedro88 (Kevin Pedro) for CMSSW_9_4_X.

It involves the following packages:

RecoMET/METAlgorithms

@perrotta, @cmsbuild, @slava77 can you please review it and eventually sign? Thanks.
@TaiSakuma, @gouskos, @ahinzmann, @mmarionncern, @jdamgov, @jdolen, @nhanvtran, @gkasieczka, @clelange, @schoef, @mariadalfonso, @seemasharmafnal this is something you requested to watch as well.
@davidlange6, @slava77, @fabiocos you are the release manager for this.

cms-bot commands are listed here

• Backported from Speedup MET significance calculation #24135

[kpedro88]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/29616/console Started: 2018/08/01 20:33

[cmsbuild]

+1
Tested at: 0d4de80
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-24166/29616/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-24166/29616/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 27
• DQMHistoTests: Total histograms compared: 2721493
• DQMHistoTests: Total failures: 110
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2721221
• DQMHistoTests: Total skipped: 162
• DQMHistoTests: Total Missing objects: 0

[slava77]

+1

for #24166 0d4de80

• technical update to speedup execution, mostly significant only in light analysis implementations (expected to be ~invisible in miniAOD)
  • the backport is correct: the same code changes are applied as in Speedup MET significance calculation #24135
• jenkins tests pass and comparisons with the baseline show no (relevant) differences

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_9_4_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_10_3_X is complete. This pull request will now be reviewed by the release team before it's merged. @davidlange6, @slava77, @smuzaffar, @fabiocos (and backports should be raised in the release meeting by the corresponding L2)

[fabiocos]

+1