How many instances of a common dependency exist in memory?

[Clint]

Given the following SystemJS config snippet:

map: {
  "aaa": {
    "lodash": "npm:lod...@4.6.1"
  },
  "bbb": {
    "lodash": "npm:lod...@4.6.1"
  }
}

How many instances of lodash will exist in memory?

Every module gets its own namespace, so initially I thought this meant lodash would be instantiated twice. However, my understanding is that ES6 modules are immutable--which means it would be safe to only have a single instance of lodash...

Can you clarify?

Thanks!

[Guy Bedford]

Yes, there is a single module registry namespace which allows every module to execute only once and be shared.

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