This is a quick discussion and example of a common memory leak scenario. This can happen in any language that provides a mechanism to attach event listeners or subscribers. Examples:
- a Java class can maintain a List of subscribers, and notify them on change.
- JavaScript jQuery events maintain a collection of event listeners.
- go and channels
This example uses Meteor purely for convenience of auto-building and live reload.
Install MeteorJs 1.4.2 and run using meteor --port 3020
Optionally, install Mongo and set MONGO_URL prior to running. (This code doesn't use a database)