我正在测试从“开始”页面（此处）生成的空 Vaadin 项目
我面临着非常缓慢的启动时间（最多 6 分钟）而且我并不真正了解发生了什么，我尝试设置 vaadin.servlet.productionMode=true 但它并没有解决问题。
有没有办法生成更详细的启动日志？您可以在下面找到当前日志。
2020-02-13 09:18:14.399 INFO 12084 --- [ restartedMain] it.my-project.Application : Starting Application on XCR10248 with PID 12084 (C:\Dev\workspace-eclipse-2019\my-project\target\classes started by cr10248 in C:\Dev\workspace-eclipse-2019\my-project)
2020-02-13 09:18:14.399 INFO 12084 --- [ restartedMain] it.my-project.Application : No active profile set, falling back to default profiles: default
2020-02-13 09:18:14.446 INFO 12084 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2020-02-13 09:18:14.446 INFO 12084 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2020-02-13 09:18:15.868 INFO 12084 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-02-13 09:18:15.872 INFO 12084 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-02-13 09:18:15.872 INFO 12084 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.27]
2020-02-13 09:18:16.326 INFO 12084 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-02-13 09:18:16.326 INFO 12084 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1880 ms
2020-02-13 09:18:19.373 INFO 12084 --- [ restartedMain] c.v.f.s.VaadinServletContextInitializer : Search for subclasses and classes with annotations took 2 seconds
2020-02-13 09:18:19.381 INFO 12084 --- [ restartedMain] c.v.f.server.startup.DevModeInitializer : Starting dev-mode updaters in C:\Dev\workspace-eclipse-2019\my-project folder.
2020-02-13 09:18:19.412 INFO 12084 --- [ restartedMain] dev-updater : Visited 94 classes. Took 31 ms.
2020-02-13 09:18:19.444 INFO 12084 --- [ restartedMain] dev-updater : Skipping `npm install`.
2020-02-13 09:18:19.444 INFO 12084 --- [ restartedMain] dev-updater : Copying frontend resources from jar files ...
2020-02-13 09:18:19.819 INFO 12084 --- [ restartedMain] dev-updater : Visited 12 resources. Took 372 ms.
2020-02-13 09:18:19.850 INFO 12084 --- [ restartedMain] dev-updater : No js modules to update 'C:\Dev\workspace-eclipse-2019\my-project\target\frontend\generated-flow-imports.js' file
2020-02-13 09:24:48.821 INFO 12084 --- [ restartedMain] dev-webpack : Starting webpack-dev-server, port: 63432 dir: C:\Dev\workspace-eclipse-2019\my-project
2020-02-13 09:24:48.951 INFO 12084 --- [ restartedMain] dev-webpack : Running webpack to compile frontend resources. This may take a moment, please stand by...
2020-02-13 09:25:18.986 INFO 12084 --- [ restartedMain] dev-webpack : Webpack startup and compilation completed in 30165ms
2020-02-13 09:25:19.211 INFO 12084 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-02-13 09:25:19.649 INFO 12084 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2020-02-13 09:25:19.836 INFO 12084 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-02-13 09:25:19.836 INFO 12084 --- [ restartedMain] it.my-project.Application : Started Application in 425.889 seconds (JVM running for 427.06)
谢谢大卫