加快tomcat8启动速度

1.禁止Servlet 3扫描
修改tomcat/conf/catalina.properties 文件

org.apache.catalina.startup.ContextConfig.jarsToSkip=*.jar
tomcat.util.scan.StandardJarScanFilter.jarsToSkip=*.jar


2. 模块并行启动
修改tomcat/conf/server.xml
每个 host 与 engin 增加属性
startStopThreads="0"

<Engine
  ..
  startStopThreads="0"
>
  <Host
    ..
    startStopThreads="0"
  >