Files related to this comment: webpack/webpack#9802 (comment)

Names should hopefully be obvious the "fscache" ones are with the filesystem cache configured:

cache: {
    type: 'filesystem',
    buildDependencies: {
        config: [__filename], // you may omit this when your CLI automatically adds it
    },
},

The "memcache" ones are with cache: 'memory'.

In both cases there were three compilations: initial, and two no-op file changes (touch of the entry point JS file).