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Optimize CUDA kernels with a LangGraph agent loop

Built a LangGraph workflow plus C++ harness so agents can run, benchmark and Nsight-profile CUDA kernels.

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Source

bertaye on Hacker News · 2026-09-25 · Project link

Written in our own words. Credit to the original author. Link checked 2026-10-15.

What they did

Built a LangGraph workflow plus C++ harness so agents can run, benchmark and Nsight-profile CUDA kernels.

Result (as claimed)

Agents iterate on kernels with real benchmarks.

Tools they used

The source does not name specific tools.

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Goal: Optimize CUDA kernels with a LangGraph agent loop
What the original author did: Built a LangGraph workflow plus C++ harness so agents can run, benchmark and Nsight-profile CUDA kernels.
Reported result (as claimed by the author): Agents iterate on kernels with real benchmarks.
Source: https://news.ycombinator.com/item?id=49842596
Tools they used: not named in the source
Category: Dev & ops

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3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data.
4. Finish with a checklist to run it again next time.

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