What’s the fastest way to parse a large XML file in Node.js?

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Asked By TechieNinja92 On

I'm working with a massive XML file that's about 2-3 GB in size, and I'm trying to find the quickest method to parse it using Node.js. I've experimented with packages like xml-flow and xml-stream, but they end up taking 20-30 minutes to complete the parsing. Are there more efficient ways to handle this in Node.js, or should I consider using a different programming language or tool altogether?

4 Answers

Answered By XMLGuru47 On

Here are a few strategies to improve parsing speed:

1. Check out more NPM packages like fast-xml-parser.
2. Use streams to read the file instead of loading it all into memory at once.
3. Increase Node.js memory limits with the --max-old-space-size flag.
4. Consider custom parsing methods, like leveraging line number patterns or regex if applicable.

If you're still facing issues, sharing your code in a repository could help others give you more tailored advice!

TechieNinja92 -

I'm already using streams and have tried a bunch of suggestions. Just trying to cut down on parsing time as it stands.

Answered By QuestionSeeker23 On

2-3GB isn't enormous by today's standards. What exactly do you want to achieve after parsing the file? It might help us provide better solutions if we understand your goals!

Answered By DevPro42 On

If performance is critical, consider writing a custom XML parser tailored to the specific structure of your XML file. By working with low-level constructs like ArrayBuffer instead of typical JS objects, you might reduce overhead. Alternatively, using a compiled language like C, Rust, or Go could significantly speed up the processing. Go, in particular, is great for handling concurrent processing if that's relevant.

Answered By CodeWhisperer88 On

You might want to consider converting the XML into a database or even a JSON format, which can speed things up significantly. Also, could you clarify what the XML file contains? Are there specific operations or queries you need to run on that data?

TechieNinja92 -

The XML file stores job data that gets updated frequently, and I need to ingest it daily since it includes millions of jobs.

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