Agreed! The bug has been filed, looked at by the wonderful people over at your HQ, and resolved--all faster than I can get the new toolchain to compile.
It looks like the operators && and || were missing a transparent annotation. I wonder if such issues are worth testing more systematically for primitive numeric types, and if so, how that might be done. On Tue, Aug 2, 2016 at 22:29 Chris Lattner <clatt...@apple.com> wrote: > If you see such a drastic slowdown, then tat sounds like a critical > regression that you found in the latest beta. We would really appreciate a > bug report (radar or jira) with a testcase! > > > -Chris > > On Aug 2, 2016, at 7:38 AM, 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. 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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