Question 1

How does syncthrough compare to through2 in performance?

Accepted Answer

syncthrough offers 10x higher throughput than through2 and standard Transform streams by using synchronous processing and eliminating internal buffering, making it ideal for performance-critical pipelines. However, it lacks async support and has stricter error handling.

Question 2

Can I use async functions with syncthrough?

Accepted Answer

No, syncthrough only supports synchronous transformation functions. For asynchronous operations, you should use standard Transform streams or through2 with callbacks, as syncthrough's design prioritizes speed over async flexibility.

Question 3

How to handle backpressure errors in syncthrough?

Accepted Answer

Implement proper 'drain' event listeners and avoid calling write() after it returns false, as syncthrough throws errors on backpressure violations. Use pipeline() or pump() for automatic error handling in stream compositions.

Question 4

Is syncthrough good for object mode streams?

Accepted Answer

Yes, syncthrough fully supports object mode streams, allowing you to transform objects instead of buffers with the same API. It's compatible with standard object mode pipelines but requires synchronous functions.

Question 5

What are the main limitations of syncthrough?

Accepted Answer

Key limitations include no internal buffering or chunk splitting, strict backpressure that can throw errors, and lack of inheritance from Node.js stream classes. It's best used in controlled, performance-focused scenarios.

Question 6

How to install and use syncthrough in a Node.js project?

Accepted Answer

Install via npm with 'npm i syncthrough --save', then integrate it into stream pipelines using transform and flush functions, as shown in the README example. Always pair it with pipe(), pump(), or pipeline() for best results.

syncthrough

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