Exploring Express.js: Implementing multithreading and asynchronous techniques for handling simultaneous HTTP requests

Recently, I find myself exploring ways to manage large-scale HTTP requests using Express.js. While I'm aware that Node.js has introduced 'workers' from version 13 onwards for multithreading capabilities, I am curious about how to effectively handle multiple HTTP requests directed at a single endpoint and how to scale up the process.

For instance, if there are around 10,000 simultaneous requests, would another thread automatically initiate to handle the excess requests and enhance processing speed? Or is there a specific configuration that needs to be set up for this to happen seamlessly?

Any insights on this matter would be greatly appreciated!

javascriptmultithreadingexpresshttp

Answer №1

Express.js is built on the concept of the event loop, where each request-response cycle is expected to consume minimal CPU time (excluding any I/O waiting times). This design allows an Express.js server to effectively handle numerous requests on a single thread. To achieve this efficiency, it is assumed that any request requiring more than minimal CPU time will be delegated to a Worker thread or a separate process, thereby executing the computation outside the event loop thread. It is the responsibility of the developer to manage this.

If your Express.js application is struggling to cope with the incoming request volume despite following this philosophy, the solution lies in scaling up beyond its current capacity using a load balancer. This can be implemented either at the web server level (such as Apache httpd's mod_load_balancer) or at the DNS level.

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