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Branch prediction has gotten a lot better, that's true. Especially by taking more preceding branches into account. But saying that branch mispredictions rarely
by anarazel 10y ago
Branch prediction has gotten a lot better, that's true. Especially by taking more preceding branches into account.
But saying that branch mispredictions rarely matter seems a way too strong statement. In a lot of halfway performance critical software a large number of pipeline stalls are caused by wrongly predicted branches, and utilizing the pipeline efficiently is IMO becoming Mir, not less, important.