kmeans

Since swift is released as open source it would be interesting to compare swift performances. I found the interesting project http://github.com/andreaferretti/kmeans that compares the execution time of the KMeans algorithm on several languages. From the results it looks like that the execution time is comparable to python and it is pretty distant from the top. http://github.com/andreaferretti/kmeans/blob/master/results Results ------- nim (0.11.3) 148 ms java (1.7.0_76) 183 ms .... python (2.7.6) 10632 ms pharo (3) 11170 ms swift (2.2-dev) 11391 ms perl (5.20.2) 15680 ms rubinius (2.5.2) 20878 ms ruby (1.9.3p484) 24819 ms

The last time this post appeared, I actually submitted a PR which did this, among other things: https://github.com/andreaferretti/kmeans/pull/3 The post wasn't really updated.

>>the whole language is verbose: compare these 10 lines (https://github.com/andreaferretti/kmeans/blob/935b8966d4fe0d...) with this single line (https://github.com/andreaferretti/kmeans/blob/master/nim/alg...) The Nim code's more concise in this case but the Rust code can be more clearly written: impl Add for Point { type Output = Point; fn add(self, other: Point) -> Point { Point(self.0 + other.0, self.1 + other.1) } } The "type Output = Point" line isn't boilerplate, it makes it possible to define the result of an addition as something other than a Point. (Off of the top of my head I can't think of any use cases, but I'm happy with the capability personally).