Question 1

How should I parse large XML files?

Accepted Answer

For files under 10MB, DOM parsing (loading entire document into memory) is fine. For larger files, use SAX or StAX (streaming) parsers that process elements one at a time without loading the full document.

Question 2

What is the performance of XML vs JSON for 1000 records?

Accepted Answer

XML files are typically 30–50% larger than equivalent JSON due to closing tags. Parsing is also slower — JSON.parse is 2–5x faster than DOM XML parsing. However, XML supports schemas (XSD), namespaces, and XSLT transformations that JSON lacks.

XML File with 1,000 Records

Other XML files

Frequently Asked Questions

Other data formats

Similar files in other formats