You could write some examples in both C and Swift in order to gain experience in how to write your Swift code so that it will (probably) run as fast as (or faster than) your corresponding C code.
I've done this for a number of different performance critical things and it is often possible to get the Swift version as fast as the C version. (If you find something that is not possible (or unnecessarily cumbersome) to write as fast in Swift as in C, you could probably file a bug/improvement on bugs.swift.org. I did this some time ago when I noticed that Swift's optimizer missed an opportunity to unroll loops in a certain situation and it turned out that a fix/optimizer-improvement was already on its way.) You must of course profile/microbenchmark your code in some meaningful way, setting all relevant compiler flags for both C and Swift, preventing dead code elimination, measuring average or perhaps median times of lots of tests, making sure what should and shouldn't be statically knowable, etc. In Swift you probably want -O -whole-module-optimization, and (rarely) you might want/need to disable safety checks. /Jens On Sat, Oct 1, 2016 at 10:33 PM, Daniel Dunbar via swift-users < swift-users@swift.org> wrote: > Yes, it is possible. Exactly how much use of Unsafe style idioms and other > performance-focused "workarounds" it requires depends a lot on the code in > question. Can you say more about your problem area? > > - Daniel > > > On Oct 1, 2016, at 1:30 PM, Игорь Никитин via swift-users < > swift-users@swift.org> wrote: > > > > Hello! > > Is it possible for Swift to be as fast as C when writing performance > critical code? Of course if using C Standard Library for instead of > Foundation (and so on) and getting rid of dynamic dispatch and reference > types. > > Or I need just to use C? > > _______________________________________________ > > swift-users mailing list > > swift-users@swift.org > > https://lists.swift.org/mailman/listinfo/swift-users > > _______________________________________________ > swift-users mailing list > swift-users@swift.org > https://lists.swift.org/mailman/listinfo/swift-users >
_______________________________________________ swift-users mailing list swift-users@swift.org https://lists.swift.org/mailman/listinfo/swift-users
