K3 got 77% speedup on mjwarp kernels; GPT-6 Astra added just 0.38%
YouJiacheng · x · 2026-09-10
A developer reports: last week K3 optimized mjwarp kernels for a workload for a 77% speedup. Asking GPT-6 Astra to optimize further, it first failed with an obviously wrong direction, then tuned numthreads for only 0.38% gain. The author notes GPT-6 Astra performs well on other tasks.
Related event: K3 delivers 77% kernel speedup, GPT-6 adds little(2 posts)→
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