# Show HN: Optimized CUDA forced alignment kernels. 10x – 1000x faster

> Source: <https://github.com/brthor/fast-forced-aligner>
> Published: 2026-10-30 21:06:35+00:00

blog post: [https://www.bryanthornbury.com/posts/fast-forced-alignment](https://www.bryanthornbury.com/posts/fast-forced-alignment)

github: [https://github.com/brthor/fast-forced-aligner](https://github.com/brthor/fast-forced-aligner)

I developed optimized CUDA kernels to speed up my forced alignment pipelines using Astra.

To my surprise, I was able to achieve speeds 10x - 1000x faster than popular existing open source options, including the torchaudio implementations I was using before.

I'm sharing them for anyone else who finds them useful.

The acceleration from AI is getting wild.

Comments URL: [https://news.ycombinator.com/item?id=50310134](https://news.ycombinator.com/item?id=50310134)

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