Performance

npm run bench creates representative three-step Feature files, then measures lintFiles at 1, 100, and 1,000 files with concurrency 8. It reports elapsed time, diagnostic count, and sampled peak resident memory.

One local run on Node.js 26.5.1 produced:

Files	Elapsed time	Peak resident memory	Diagnostics
1	6.7 ms	66.7 MiB	0
100	16.3 ms	70 MiB	0
1,000	102 ms	85.1 MiB	0

These are single-run measurements from one machine, not performance guarantees. The first measurement is the first lint call in the process. Later measurements reuse the loaded runtime. The project has no result cache, so each call reads and parses its files. Peak memory is sampled every 5 ms.