With the Array operations: append or insert
var tmp: [CChar] = [0, 0]
for i in 1 ... 100 {
tmp.insert(0, at: 0)
}
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 09 Apr 2017, at 06:33, Proyb P <pro...@gmail.com> wrote:
>
> How do I append character A-Z by integer into CChar and benchmark timing how
> fast it’s append compare to UInt8?
>
> var tmp: [CChar] = [0,0]
> for var i in 0...256 {
> tmp[0] = 100
> }
> print(String(cString: &tmp))
>
>
> On Sun, Apr 9, 2017 at 3:17 AM, Proyb P <pro...@gmail.com> wrote:
> 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 <r...@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@swift.org>
> > 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@swift.org
> > https://lists.swift.org/mailman/listinfo/swift-users
>
>
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