Hi,
I know this has been asked before but I was wondering if someone could give an up-to-date answer: as the thread count increases, does Stockfish's search "thicken", or is it simply that it gets faster at reaching a certain depth?
Many thanks.
SF Search thickening with more threads
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MikeB
- Posts: 4889
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Re: SF Search thickening with more threads
Due to the inherent inefficiency of multiple threads versus a single thread, most engines will have a wider search or "a larger search tree" ( -> more commonly used terms to describe the observable behavior your are describing). There has been many patches to reduce tree size when using both single thread and multiple threads. In the end, almost all tree searches are larger when using multiple threads, but there a few exceptions when there is a singular best move, where the best move is found earlier in a multiple thread (core) mode, which may significantly reduce the tree size for a period of time versus a single thread search.
