[swift-users] Alternative to UnicodeScalar

[Proyb P]

Agree, in some case, I seem to find Cchar is really shine at 10x faster
than Python from A to Z, 1000x faster than normal Swift? Not sure if there
was flaw in the time measurement.

On Sunday, 9 April 2017, Rien <Rien at balancingrock.nl> wrote:

> Server-side is usually UTF-8 (not always), so often you don’t really need
> strings.
> As an aside, time measurements are difficult, especially when IO is
> involved there may be thread switches or locks.
>
> I have written some parsers (UTF-8 based) and not yet encountered
> performance problems. (though faster is always better)
>
> Regards,
> Rien
>
> Site: http://balancingrock.nl
> Blog: http://swiftrien.blogspot.com
> Github: http://github.com/Balancingrock
> Project: http://swiftfire.nl - A server for websites build in Swift
>
>
>
>
>
>
> > On 08 Apr 2017, at 18:19, Proyb P via swift-users <swift-users at swift.org
> <javascript:;>> wrote:
> >
> > I have found this took about 0.001s to print 256 characters
> > Compare to Python took 0.000016s to print 256 characters, see F8 code
> and have modify to run only one call instead of 1000 iterations.
> > https://gist.github.com/anonymous/18e372e8d0173e77b5c405920d4d3080
> >
> > As this is frequently use for server-side swift that will definitely
> affected by expensive call, are there any alternative solution for
> converting Int to character close to Python timing?
> >
> > import Foundation
> > var display: String = ""
> >
> >     func printTimeElapsedWhenRunningCode(title: String, operation:
> ()->()) {
> >         let startTime = CFAbsoluteTimeGetCurrent()
> >         operation()
> >         let timeElapsed = CFAbsoluteTimeGetCurrent() - startTime
> >         print("Time elapsed for \(title): \(timeElapsed) s")
> >     }
> >
> >     printTimeElapsedWhenRunningCode(title: "s1()") {
> > let startingValue = Int(("A" as UnicodeScalar).value) // 65
> > for i in 0 ..< 256 {
> >     print(Character(UnicodeScalar(i + startingValue)!))
> > }
> > }
> > _______________________________________________
> > swift-users mailing list
> > swift-users at swift.org <javascript:;>
> > https://lists.swift.org/mailman/listinfo/swift-users
>
>
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