Jist searches JSON 3x faster than jq

In plain words

Jist is a JSON path search tool that queries JSON data using JavaScript object syntax. It processes files in chunks rather than loading them entirely into memory, enabling faster searches with significantly lower memory usage compared to jq. The tool is designed for developers who work with JSON files and need efficient data retrieval. Pattern matching is not yet supported.

written from the facts on this page · September 2026

From the sources

Search a JSON path and get the value fast. Contribute to adelamodwala/jist development by creating an account on GitHub.

jist attempts to find the complete JSON value (string, number, bool, or JSON object) for a given search key as fast as possible. You can also summarize a full json/ndjson file into a schema to you know... get the "jist" of it ;) jist uses the state-of-the art simdjson library for parsing JSON input / files smaller than 4.2GB in size. For files larger than 4.2GB or that don't fit into memory or forced streaming mode (option -s or --streaming ), jist falls back to an earlier implementation using a simple character based lexer json-tools . While the fallback implementation is relatively slower than simdjson, it's still really fast at a throughput of ~300MB/s and uses almost no memory (around…from github.com

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  Jist now searches JSON 17x faster than jq2025 · github.com · ▲7

  Hi HN! Happy to share that jist can now search JSON 17x faster than jq for a provided input (string or a file). The major change is using the bleeding edge simdjson parser as the preferred way of parsing and querying the input. Since simdjson can only work on files up to 4.2GB, jist falls back to its earlier implementation of scanning through input in chunks of 1MB which means it can still query files of virtually infinite size 3x faster than jq ever could while using ~10MB of memory. The next major feature will be summarizing input JSON into a schema - and it will do this by scanning the…

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