A fast multithreading Jsonl converter to RWKV binidx files written in Rust.

$ cargo install json2bin

$ json2bin -h
Json converter to RWKV binidx file format
Usage: json2bin [OPTIONS] --input <INPUT>

Options:
  -i, --input <INPUT>            Jsonlines file to read
  -o, --output-dir <OUTPUT_DIR>  Output directory for binidx files [default: -]
  -t, --thread <THREAD>          Number of threads [default: 8]
  -v, --verbose                  Verbosity
  -h, --help                     Print help
  -V, --version                  Print version

Following command will convert the jsonl file src/sample.jsonl into src/sample.bin and src/sample.idx files.

$ json2bin -i src/sample.jsonl

The output directory can be set with the argument "--output-dir <OUTPUT_DIR>" or "-o <OUTPUT_DIR>"

$ json2bin -i src/sample.jsonl -o output

The default threads number is 8, it can be changed with the argument "--thread" or "-t"

$ json2bin -i src/sample.jsonl -t 4

We converted a 19GB English Wikipedia (20231101.en) in jsonl format to binidx format in M2 Apple machine. The Rust json2bin run with 7 threads, and it was 70 times faster than the Python json2binidx:

• The Python json2binidx: 1:01:45 or 5.13MB/s
• This Rust json2bin: 52.64s or 360.86MB/s