[swift-users] Alternative to UnicodeScalar

[Proyb P]

I ran with -Ounchecked as most benchmark do, are there more optimization
level I'm not aware?

On Sun, Apr 9, 2017 at 12:44 AM, Shawn Erickson <shawnce at gmail.com> wrote:

> What optimization level did you try this at? You are also including the
> print func in your performance test which is a non-trivial amount of code
> being executed. Also when in doubt profile the code to see the time spent
> to better nail down the hotspot locations.
>
> If performance issues exist then leveraging things like a lookup table of
> pre-built structure can help, etc.
>
> -Shawn
>
> On Sat, Apr 8, 2017 at 9:19 AM Proyb P via swift-users <
> swift-users at 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)!))
>> }
>> }
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>>
>
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