Generate Chrome profile file which includes timings of plugins execution. Outputs events.json file by default. It is possible to provide custom file path using outputPath option.
outputPath: A relative path to a custom output file (json)new webpack.debug.ProfilingPlugin();
outputPath  new webpack.debug.ProfilingPlugin({
  outputPath: 'profiling/profileEvents.json'
});
 In order to view the profile file:
ProfilingPlugin.Performance tab (formerly Timeline).events.json by default) into the profiler.It will then display timeline stats and calls per plugin!
    © JS Foundation and other contributors
Licensed under the Creative Commons Attribution License 4.0.
    https://webpack.js.org/plugins/profiling-plugin