> On Aug 2, 2016, at 07:38, Xiaodi Wu via swift-evolution > <swift-evolution@swift.org> wrote: > > I'd like to echo Muse's point. Accelerate is no solution: it's not available > on Linux (and cross-platform numerics is very much essential for the > sciences--I assume engineering and finance as well); moreover, it doesn't > solve the issue of, as you point out, other kinds of math. > > The appeal to me of Swift was that it promised a memory-safe-by-default > systems programming language, a compiled language with performance that can > be in the same ballpark as C. So while specialized libraries like BLAS can > speed up matrix algebra considerably, IMO, the same kinds of math that are > done in C or Go or Rust without calling BLAS should perform roughly > equivalently when ported to Swift. That it doesn't should be a bug, and the > workaround shouldn't have to be dropping down to or calling out to libraries > written in C or Fortran. > > Recently, I discovered that a straightforward numerics algorithm that only > adds, divides, multiplies, and compares floating point values slowed down > five to ten *times* between preview 3 and preview 4.
Can you open a bug at bugs.swift.org and include a test case that can be compiled and executed to demonstrate the issue? Mark > This was stunning--and if performance ever was comparable to C before (I > didn't check for this particular function), I know for sure that it isn't > anymore! Although I'm confident that the underlying cause will be found, it > does raise questions as to the continued wisdom of writing even somewhat > performance-sensitive math in Swift. >> On Mon, Aug 1, 2016 at 20:04 Saagar Jha via swift-evolution >> <swift-evolution@swift.org> wrote: >> Well, it depends on what kind of Math you’re trying to do. The Accelerate >> framework is available if you need performance. >> >> Saagar Jha >> >> >> >>> On Aug 1, 2016, at 18:01, Muse M via swift-evolution >>> <swift-evolution@swift.org> wrote: >>> >>> Have always wonder why Maths in Swift is slower than C and Go, it should be >>> address with priority if Swift is to be adopt for engineering, financial >>> and science industry. >>> >>> On Tue, Aug 2, 2016 at 4:43 AM, Charlie Monroe via swift-evolution >>> <swift-evolution@swift.org> wrote: >>>> See >>>> https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20160725/025711.html >>>> >>>> From what I understand, the discussion should stay focused on the main >>>> topics for Swift 4 that Chris highlighted in >>>> https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20160725/025676.html >>>> >>>> I had several ideas in mind, but am postponing them for Swift 5, seeing >>>> the schedule... >>>> >>>> >>>>> On Aug 1, 2016, at 8:48 PM, Anton Zhilin via swift-evolution >>>>> <swift-evolution@swift.org> wrote: >>>>> >>>>> It was stated that 27th of July was the last date for proposal >>>>> acceptance, 29th of July was the last day for implementation, and 1th of >>>>> August should be the starting day of Swift 3.1-related discussions. >>>>> Am I right? Should we begin? >>>>> _______________________________________________ >>>>> swift-evolution mailing list >>>>> swift-evolution@swift.org >>>>> https://lists.swift.org/mailman/listinfo/swift-evolution >>>> >>>> >>>> _______________________________________________ >>>> swift-evolution mailing list >>>> swift-evolution@swift.org >>>> https://lists.swift.org/mailman/listinfo/swift-evolution >>>> >>> >>> _______________________________________________ >>> swift-evolution mailing list >>> swift-evolution@swift.org >>> https://lists.swift.org/mailman/listinfo/swift-evolution >> >> _______________________________________________ >> swift-evolution mailing list >> swift-evolution@swift.org >> https://lists.swift.org/mailman/listinfo/swift-evolution > _______________________________________________ > swift-evolution mailing list > swift-evolution@swift.org > https://lists.swift.org/mailman/listinfo/swift-evolution
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