perf(super-converter): replace xml-js with direct sax tree builder for DOCX import (SD-2291)#2514
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…r DOCX import Bypass xml-js's overhead (options validation, generic dispatch, JSON stringify+parse round-trip) by using sax.js directly with a purpose-built tree builder that produces the same non-compact JSON format. Benchmarks on customer's 11MB document.xml: - Old (JSON.parse(xml2json())): ~1,980ms (browser) - New (direct sax builder): ~810ms (browser) - ~2x faster across all document sizes The new parser produces identical output — verified by 13 unit tests including head-to-head comparison against xml-js on realistic DOCX fragments. SD-2291
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Bypass xml-js's overhead (options validation, generic dispatch, JSON stringify+parse round-trip) by using sax.js directly with a purpose-built tree builder that produces the same non-compact JSON format.
Benchmarks on customer's 11MB document.xml:
The new parser produces identical output — verified by 13 unit tests including head-to-head comparison against xml-js on realistic DOCX fragments.