It’s not exactly the lazy parser you describe, but Sparser[1] builds filters to exclude json lines/files that can’t contain what you’re looking for, and only pa

It’s not exactly the lazy parser you describe, but Sparser[1] builds filters to exclude json lines/files that can’t contain what you’re looking for, and only parses those that might. The Morning Paper’s writeup[2] from last year provides a good summary [1]: http://www.vldb.org/pvldb/vol11/p1576-palkar.pdf http://www.vldb.org/pvldb/vol11/p1576-palkar.pdf [2]: https://blog.acolyer.org/2018/08/20/filter-before-you-parse-faster-analytics-on-raw-data-with-sparser/ https://blog.acolyer.org/2018/08/20/filter-before-you-parse-...