Node js worker threads for multithreading (typescript)

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• JavaScript is known as a single thread programming language.

• That means it will execute only one set of instruction at any time in same process.

• nothing that required the complexity of multithreading.

• Node runs on a single thread, and there is just one process happening at a time in the event loop.

• One code, one execution, (the code is not executed in parallel).

• This is very useful because it simplifies how you use JavaScript without worrying about concurrency issues.

• There is a downside single threading

• that code can block the event loop and prevent other requests of being handled.

• I have created one worker file which will create one worker thread to execute particular code on separate thread.

• So we have to create one js file which read code from ts file and execute it as JavaScript code and that’s why we need ts-node module.

• This worker file is create one worker which will execute on another thread.

• We have to create both files as worker_threads only excepts js or jsx files

• Add your code in migration.ts file which you want to execute on different thread.

• Now you have to just call runWorker method from worker.ts file which will execute your code in migration.ts file.