Switch to the on-demand Checkstyle Rules initiatilzation

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      After profiling of https://github.com/jenkinsci/ci.jenkins.io-runner/pull/366 in Jenkinsfile Runner, Warnings NG Checkstyle rules initialization consumes about 10% of total CPU samples for a reference buildPlugin() run. See the attached screenshot, raw Java Flight Recorder dump is available in attachments.

      It would be great to modify the plugin to do on-demand Checkstyle Rules initialization.

       

        1. image-2020-09-23-17-22-06-418.png
          image-2020-09-23-17-22-06-418.png
          77 kB
        2. recording-no-war.jfr
          7.67 MB

            Assignee:
            Ulli Hafner
            Reporter:
            Oleg Nenashev
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              Created:
              Updated:
              Resolved: