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 <[email protected]> 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 < > [email protected]> 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 >> [email protected] >> https://lists.swift.org/mailman/listinfo/swift-users >> >
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