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by millstone
3993 days ago
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On the other hand, pointer chasing is decidedly not memory friendly. And mutable memory has a great deal of mechanical sympathy! A function's entire stack frame can live in the L1 or L2 cache. Imagine something like determining the length of a linked list, and then GCing all of the intermediate values. I am not sure what the cost is of the cache coherency hardware, but if it were high, then presumably single-core CPUs would have a big advantage on single-threaded workloads. That doesn't seem to be the case. |
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