Crate rustyssim 

rustyssim

A high-performance IATA SSIM (Standard Schedules Information Manual) parser built in Rust. Parses SSIM files into Polars DataFrames or exports directly to CSV/Parquet formats.

Quick Start

use rustyssim::ssim_to_dataframe;

let df = ssim_to_dataframe("schedule.ssim", Some(10000), Some(8192), Some(false), Some(false))
    .expect("Failed to parse SSIM file");

println!("Parsed {} flight records", df.height());

Output Formats

Function	Output
ssim_to_dataframe	Single DataFrame
ssim_to_dataframes	Three DataFrames (carriers, flights, segments)
ssim_to_csv	CSV file on disk
ssim_to_parquets	Parquet files (one per carrier)

Segment Condensing

Functions that accept condense_segments can aggregate multiple segment records for the same flight into a single JSON column, reducing row count and file size.

Performance Tuning

• batch_size: Number of records processed per batch. Larger values use more memory but reduce overhead. Default: 10,000.
• buffer_size: File read buffer in bytes. Increase for large files. Default: 8,192 (8 KB). Try 131,072 (128 KB) for large files.

Re-exports

pub use polars;

Functions

ssim_to_csv

Parse SSIM file and write to CSV (streaming).

ssim_to_dataframe

Parse SSIM file into a single combined DataFrame. Record Types 2, 3, and 4 are merged into one DataFrame with appropriate joins.

ssim_to_dataframes

Parse SSIM file into three separate DataFrames based on record types i.e. 2, 3, and 4 from the SSIM file.

ssim_to_parquets

Parse SSIM file and write to Parquet files (one per carrier).