Dear all, I am quite baffled by the results I get when using @btime. I was following this simple lecture: https://cuda.juliagpu.org/stable/tutorials/introduction/ and just by copying and pasting from this page to a Julia script, got the following: using Test …

In short: @btime runs the function several times and thus updates y several times.

Indeed, changing the last few lines to: @btime begin fill!(y, 2.0f0) sequential_add!($y, $x) end fixed th…

Although, to do the testing properly you should look at the link posted by @rafael.guerra

Wrong results when I use @btime

rafael.guerra November 11, 2021, 10:35am 2

This thread might be of interest for benchmarking your in-place functions.

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