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10 Node.js Tips You Won’t Learn in a Beginner’s Guide

habtesoft
4 min readNov 12, 2024

Node.js has become one of the most popular environments for backend development, thanks to its speed, efficiency, and flexibility. However, moving beyond beginner-level Node.js requires mastering more advanced techniques and adopting best practices that can make your applications faster, more maintainable, and scalable. Here are ten essential tips to level up your Node.js skills.

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1. Use async/await with Caution in Loops

While async/await can simplify asynchronous code, using it in loops can slow down your application. When you use await inside a loop, each iteration waits for the previous one to complete, making it synchronous. Instead, use Promise.all() to run multiple async operations in parallel.

Example:

// Slower: awaits each iteration
for (let userId of userIds) {
await getUserDetails(userId);
}

// Faster: executes all promises in parallel
await Promise.all(userIds.map(id => getUserDetails(id)));

2. Stream Data for Better Performance

Node.js supports streams, which allow you to handle data in chunks rather than loading everything into memory at once. This is particularly…

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habtesoft
habtesoft

Written by habtesoft

Passionate JavaScript developer with a focus on backend technologies. Always eager to connect and learn. Let’s talk, https://buymeacoffee.com/habtesoftat

Responses (1)

What are your thoughts?

Good points.
Be careful that Promise.all() will stop as soon as one of the actions is rejected !
Prefer Promise.allSettled() if you want all your actions to be executed, whether resolved or rejected, and return their statuses.

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