[hellogcc] Re: [hellogcc] 转篇有意思的一篇文章，请教一下
- From: xunxun <xunxun1982@xxxxxxxxx>
- To: hellogcc@xxxxxxxxxxxxx
- Date: Fri, 23 May 2014 14:32:46 +0800
可以参考
http://stackoverflow.com/questions/5729964/why-arm-neon-not-faster-than-plain-c
http://stackoverflow.com/questions/6034966/neon-asm-code-running-much-slower-than-c-code
On Fri, May 23, 2014 at 2:32 PM, xunxun <xunxun1982@xxxxxxxxx> wrote:
> 优化的效果很难说，这个大多是和你的平台或者硬件架构有关，比如导致的cache miss之类的
>
>
> On Sun, May 4, 2014 at 5:50 PM, Shuduo Sang <sangshuduo@xxxxxxxxx> wrote:
>
>>
>> http://www.learnopengles.com/a-performance-comparison-between-java-and-c-on-the-nexus-5/?utm_source=rss&utm_medium=rss&utm_campaign=a-performance-comparison-between-java-and-c-on-the-nexus-5
>>
>> 为什么打开(LOCAL_ARM_NEON := true) -ffast-math -O3编译选项的gcc
>> 4.8比不打开的时候还差一点(1.02 vs 1.00) ？
>>
>> Thanks,
>> Shuduo
>>
>>
>
>
> --
> Best Regards,
> xunxun
>
--
Best Regards,
xunxun
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