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runs = 10
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f = function()
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{
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set.seed (1)
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m <- 3500
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n <- 3500
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A <- matrix (runif (m*n),m,n)
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# Matrix multiply
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B <- crossprod(A)
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}
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cumulate = 0
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for (i in 1:runs)
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cumulate = cumulate + as.numeric(system.time(f())[3])
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cat(paste0(round(cumulate/runs, 3), "\n"))
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