Massive pipeline performance degradation of declarative pipeline since upgrading Jenkins container for Jenkins running inside a buster-slim based container.

Stages takes x2 time to complete on average, see screenshot for the Jenkinsfile bellow

What changed :

• upgraded jenkins from 2.295 to 2.332.2
• upgraded jdk default-jre-headless to openjdk-11-jre
   
  Unable to find source-code formatter for language: jenkinsfile. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml

  pipeline {
    agent any  environment {
      HOME               = "/home/jenkins"
    }  stages {
      stage('STEP1') {
        steps {
            sh '''
            sleep 1
            sleep 1
            sleep 1
            sleep 1
            sleep 1
            '''
          }
      }
      stage('STEP2') {
        steps {
            sh '''
            sleep 1
            sleep 1
            sleep 1
            sleep 1
            sleep 1
            '''
          }
      }
      stage('STEP3') {
        steps {
            sh '''
            sleep 1
            sleep 1
            sleep 1
            sleep 1
            sleep 1
            '''
          }
      }
    }
  }