FastParseX, A high‑performance C++ parser for huge CSV/Log/Binary files (mmap, zstd, Arrow/Parquet)

I've been working on a C++ parsing engine focused on processing very large files (GB-TB scale) with predictable performance and minimal allocations.

FastParseX supports:

\- zero-allocation CSV parsing (quoted fields, multiline, trimming)

\- log parsing (Apache/Nginx/custom formats)

\- binary parsing (endianness, slicing, struct reading)

\- memory-mapped I/O with madvise/prefetch

\- async buffered I/O

\- gzip/xz/zstd streaming

\- parallel chunk processing

\- profiling (type inference, cardinality, min/max)

\- Arrow export

\- Parquet export

Repo: https://github.com/FastParseX-dev/FastParseX

Feedback from people who care about low-level performance, parsing internals, or C++ API

design is very welcome.

https://redd.it/1rp4a5r
@r_cpp