Faster JSON parsing with SVE2 on ARM processors

2026-09-21

JSON ingestion often spends significant time locating structural characters before parsing values. A new simdjson implementation uses ARM SVE2's match instruction to classify those characters more directly, improving indexing throughput by 3-9% on Graviton 4 and 5. The full parser gain is smaller, but the patch shows how targeted SIMD changes can improve a heavily optimized data path.