Re: Is Swift really swift?
Re: Is Swift really swift?
- Subject: Re: Is Swift really swift?
- From: "Gerriet M. Denkmann" <email@hidden>
- Date: Sun, 06 Jul 2014 23:02:49 +0700
On 6 Jul 2014, at 03:23, Jens Alfke <email@hidden> wrote:
>
> On Jul 5, 2014, at 12:48 PM, Gerriet M. Denkmann <email@hidden> wrote:
>
>> Using maskArray took 15 sec. This is 160 times slower than computing directly: 0.09 sec (1.25 slower than Obj-C).
>
> . Have you tried CFBitVector?
Using Time Profiler in Instruments I have found that my Obj-C version uses
4616 ms for the main function + CFBitVector functions
Swift uses about the same: 4778 ms
To be added: 172 ms for stuff which was just a #define in Obj-C
But then there is a huge difference in overhead:
Obj-C has just 5 ms for CFRelease
But Swift has:
10258 ms for CFRelease, CFRetain, objc_release, objc_retain, -[NSObject retain], -[__NSCFType retain], objc_msgSend etc.
Finally also 139 ms for convertBoolToObjCBool and back
If someone is interested in looking at this code: I am very willing to share it.
It is not very big - about 200 lines per version.
Maybe there is some obvious mishandling of Swift in my code. My experience with Swift is less than a week.
Gerriet.
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