Advanced Tips

• Use custom regular expressions in config.toml to match proprietary patterns.
• Combine extract with other Unix tools for powerful pipelines.
• For performance benchmarking run cargo bench --bench performance.

Custom Configuration

Create ~/.config/extract/config.toml to tweak behaviour. You can supply your own regex patterns and adjust logging level. For quick one-off patterns, use the --regex flag on the command line and repeat it for multiple patterns:

log_level = "debug"
[custom_regexes]
"SERIAL\\d+" = "$0"

These patterns match anywhere on a line. Add word boundaries or anchors to prevent capturing text across multiple tokens.

log_level controls verbosity. At info level, every match is reported. Use debug for detailed processing steps showing how tokens are parsed and why rules may not match.

Benchmarking

Run Criterion benchmarks to gauge performance over time:

cargo bench --bench performance

Benchmarks print throughput statistics that help detect regressions.