That Claude Opus 4.5 result of 4,973 is what you get if you just vectorize the reference kernel. In fact you should be under 4,900 doing that with very little e

That Claude Opus 4.5 result of 4,973 is what you get if you just vectorize the reference kernel. In fact you should be under 4,900 doing that with very little effort (I tried doing this by hand yesterday). The performance killer is the "random" access reads of the tree node data which the scalar implementation hides, together with the lack of load bandwidth, and to tackle that you'd have to rewrite the kernel to optimize the tree data loading and processing.