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Re: 64-bit iOS
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Re: 64-bit iOS


  • Subject: Re: 64-bit iOS
  • From: Paul Franz <email@hidden>
  • Date: Tue, 10 Sep 2013 18:18:27 -0400

Should be interesting to see how this plays out. When it comes to Java, when you switch from a 32-bit JVM to a 64-bit JVM there is a 10% penalty doing so. The main reason has to do with pointers. All pointers double in size. The effect might be less in a Objective-C program.

Paul Franz

On Sep 10, 2013, at 5:47 PM, Tom Davie <email@hidden> wrote:

>
> On 10 Sep 2013, at 23:30, Jean-Daniel Dupas <email@hidden> wrote:
>
>>
>> For ARM, 64 bit matters because the instruction set has been updated to provider better performances.
>>
>> I just hope the performance boost provided by this architecture change will be enough to balance the slow-down due to the increase of instruction and pointer size.
>
> Note, this was actually more significant on x86, where most of the mess caused by CISC (like having bugger all registers) got sorted out.
>
> Tom Davie
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  • Follow-Ups:
    • Re: 64-bit iOS
      • From: Jean-Daniel Dupas <email@hidden>
References: 
 >64-bit iOS (From: Scott Ribe <email@hidden>)
 >Re: 64-bit iOS (From: Abdul Sowayan <email@hidden>)
 >Re: 64-bit iOS (From: Jean-Daniel Dupas <email@hidden>)
 >Re: 64-bit iOS (From: Tom Davie <email@hidden>)

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