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algo_luca's profile
Luca Palmieri 🦊
Luca Palmieri 🦊
Luca Palmieri  🦊
@algo_luca

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Luca Palmieri  🦊

@algo_luca

Software is complicated, people are complicated. The mix? 💥 Writing about stuff to learn how it works, mostly in Rust. Lead Engineer at @TrueLayer. He/him.

City of London, London
lpalmieri.com
Joined July 2017

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    1. Luca Palmieri  🦊‏ @algo_luca 24 Feb 2019
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      Writing time this weekend: an introduction to scientific computing in #rustlang, getting into crates and language features at the same time (hopefully with the right pace). It's geared to people in the Python/R/Julia world who are curious to have a peek at #rustlang.

      3 replies 6 retweets 15 likes
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    2. Luca Palmieri  🦊‏ @algo_luca 24 Feb 2019
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      The first part is here: https://bit.ly/2E6ynPY 

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    3. Luca Palmieri  🦊‏ @algo_luca 24 Feb 2019
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      @jbowayles @ehsanmok Your thoughts would be really appreciated!

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    4. Ehsan‏ @ehsanmok 24 Feb 2019
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      Replying to @algo_luca @jbowayles

      Good start! This reminded me of a blog post I wrote a year ago https://bit.ly/2SqeAA6  the first thing is how did you micro benchmark? even without bound checking naive Rust is not as fast as Numpy, but ndarray was fastest ...

      1 reply 1 retweet 1 like
    5. Ehsan‏ @ehsanmok 24 Feb 2019
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      Replying to @ehsanmok @algo_luca @jbowayles

      If you didn't use cargo benchmark (black box) or criterion crate, most probably the Rust result is wrong. If done in a simple loop, the compiler sees it's the same thing and won't compute it again. #![feature(test)] or criterion handle that.

      2 replies 0 retweets 0 likes
    6. Ehsan‏ @ehsanmok 24 Feb 2019
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      Replying to @ehsanmok @algo_luca @jbowayles

      Despite I did it with small f32, I guess the results shouldn't change that much (it's possible Rust has got better!). Btw, Rust has a "return" keyword . I wasn't expecting to see bubblesort at the end :)

      2 replies 0 retweets 0 likes
      Luca Palmieri  🦊‏ @algo_luca 24 Feb 2019
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      Replying to @ehsanmok @jbowayles

      Yep, people have pointed to the return typo on Reddit as well, fixed it :P You can find the benchmark code in a footnote now if you refresh.

      8:42 AM - 24 Feb 2019
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Luca Palmieri  🦊‏ @algo_luca 24 Feb 2019
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          Replying to @algo_luca @ehsanmok @jbowayles

          I wouldn't rule out the possibility that different optimizations are used by the compiler for integers compared to floats. We could have a look at the disassembled binary, but that is way too hardcore for me I am afraid.

          1 reply 0 retweets 0 likes
        3. Ehsan‏ @ehsanmok 24 Feb 2019
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          Replying to @algo_luca @jbowayles

          well, that's intrinsic LLVM! Any factor comes into play with micobenchmarking. That's why every single one of them isn't really reliable. There's a recent issue showing an interesting/weird kind of ref optimization that needs to be addressed https://github.com/rust-lang/rust/issues/58622 …

          0 replies 0 retweets 1 like
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