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jlsort\n\nSort [JSON Lines](https://jsonlines.org/) using [External merge sort](https://en.wikipedia.org/wiki/External_sorting#External_merge_sort).\n\n## Installation\n\n```\nbrew install winebarrel/jl/jlsort\n```\n\n## Usage\n\n```\nUsage: jlsort [OPTIONS] [FILE]\n\nOptions:\n    -k, --key KEY       JSON key to sort\n    -c, --capacity SIZE chunk capacity (default: 10M)\n    -n, --numeric-sort  sort fields numerically\n    -r, --reverse       sort in reverse order\n    -v, --version       print version and exit\n    -h, --help          print usage and exit\n```\n\n```\n% cat users.ndjson\n{\"id\":10,\"name\":\"Carol\"}\n{\"id\":2,\"name\":\"Alice\"}\n{\"id\":13,\"name\":\"Bob\"}\n\n% jlsort -k id users.ndjson\n{\"id\":10,\"name\":\"Carol\"}\n{\"id\":13,\"name\":\"Bob\"}\n{\"id\":2,\"name\":\"Alice\"}\n\n% jlsort -k name users.ndjson\n{\"id\":2,\"name\":\"Alice\"}\n{\"id\":13,\"name\":\"Bob\"}\n{\"id\":10,\"name\":\"Carol\"}\n\n% jlsort -k id -n users.ndjson\n{\"id\":2,\"name\":\"Alice\"}\n{\"id\":10,\"name\":\"Carol\"}\n{\"id\":13,\"name\":\"Bob\"}\n\n% jlsort -k name -r users.ndjson\n{\"id\":10,\"name\":\"Carol\"}\n{\"id\":13,\"name\":\"Bob\"}\n{\"id\":22,\"name\":\"Alice\"}\n```\n\n## Benchmark\n\n```\n# salaries.ndjson: from https://github.com/datacharmer/test_db\n% head salaries.ndjson\n{\"emp_no\":10001,\"salary\":60117,\"from_date\":\"1986-06-26\",\"to_date\":\"1987-06-26\"}\n{\"emp_no\":10001,\"salary\":62102,\"from_date\":\"1987-06-26\",\"to_date\":\"1988-06-25\"}\n{\"emp_no\":10001,\"salary\":66074,\"from_date\":\"1988-06-25\",\"to_date\":\"1989-06-25\"}\n{\"emp_no\":10001,\"salary\":66596,\"from_date\":\"1989-06-25\",\"to_date\":\"1990-06-25\"}\n{\"emp_no\":10001,\"salary\":66961,\"from_date\":\"1990-06-25\",\"to_date\":\"1991-06-25\"}\n{\"emp_no\":10001,\"salary\":71046,\"from_date\":\"1991-06-25\",\"to_date\":\"1992-06-24\"}\n{\"emp_no\":10001,\"salary\":74333,\"from_date\":\"1992-06-24\",\"to_date\":\"1993-06-24\"}\n{\"emp_no\":10001,\"salary\":75286,\"from_date\":\"1993-06-24\",\"to_date\":\"1994-06-24\"}\n{\"emp_no\":10001,\"salary\":75994,\"from_date\":\"1994-06-24\",\"to_date\":\"1995-06-24\"}\n{\"emp_no\":10001,\"salary\":76884,\"from_date\":\"1995-06-24\",\"to_date\":\"1996-06-23\"}\n\n% ls -lah salaries.ndjson\n-rw-r--r--  1 sugawara  staff   219M  8 15 00:02 salaries.ndjson\n\n% wc salaries.ndjson\n 2844047 2844047 229607343 salaries.ndjson\n\n% time -f \"Time:%E, Memory:%M KB\" jlsort -k to_date salaries.ndjson \u003e /dev/null\nTime:0:28.01, Memory:86324 KB\n# cf. https://www.gnu.org/software/time/\n\n% cat salaries.ndjson salaries.ndjson \u003e 2xsalaries.ndjson\n% cat 2xsalaries.ndjson 2xsalaries.ndjson \u003e 4xsalaries.ndjson\n% cat 4xsalaries.ndjson 4xsalaries.ndjson \u003e 8xsalaries.ndjson\n% cat 8xsalaries.ndjson 8xsalaries.ndjson \u003e 16xsalaries.ndjson\n\n% ls -lah 16xsalaries.ndjson\n-rw-r--r--  1 sugawara  staff   3.4G  8 22 16:07 16xsalaries.ndjson\n\n% time -f \"Time:%E, Memory:%M KB\" jlsort -k to_date 16xsalaries.ndjson \u003e /dev/null\nTime:12:05.33, Memory:114444 KB\n\n% time -f \"Time:%E, Memory:%M KB\" jlsort -k to_date -c 100m 16xsalaries.ndjson \u003e /dev/null\nTime:8:53.62, Memory:239324 KB\n\n% time -f \"Time:%E, Memory:%M KB\" jlsort -k to_date -c 1g 16xsalaries.ndjson \u003e /dev/null\nTime:4:47.05, Memory:2087236 KB\n\n% time -f \"Time:%E, Memory:%M KB\" jlsort -k to_date -c 4g 16xsalaries.ndjson \u003e /dev/null\nTime:2:42.51, Memory:7729932 KB\n```\n\n## Related Links\n\n* https://github.com/winebarrel/ex_merge_sort_by_key\n* https://github.com/winebarrel/jljoin\n* https://github.com/winebarrel/jluniq\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwinebarrel%2Fjlsort","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fwinebarrel%2Fjlsort","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwinebarrel%2Fjlsort/lists"}