[Jprogramming] JAndroid sandboxed

[bill lam]

There is matrix multiplication in your benchmark. Jandroid used multithreading for matrix multiplication so it’s performance is scaled up by the number of cores.

Sent from my iPhone

> On 10 Oct 2021, at 12:20 AM, Devon McCormick <devonmcc at gmail.com> wrote:
> 
> Thanks for the URL.
> I just noticed I have a page with results of these simple benchmarks from
> various machines over time:
> https://code.jsoftware.com/wiki/User:Devon_McCormick/Benchmarks .
> 
> I'm surprised that the tablet seems to mostly out-perform my new Dell
> desktop with 64 GB RAM, an SSD drive, and 2.80 GHz Intel i9-10900F
> processor.
> 
> 
>> On Sat, Oct 9, 2021 at 5:07 AM bill lam <bbill.lam at gmail.com> wrote:
>> 
>> I thin the url should be
>> 
>> https://raw.githubusercontent.com/DevonMcC/J/main/bmks.ijs
>> 
>> On Sat, Oct 9, 2021 at 11:31 AM Devon McCormick <devonmcc at gmail.com>
>> wrote:
>> 
>>> I'm interested to hear your experience with the Samsung tablet: what it's
>>> useful for, how easy it is to use, how its performance is (e.g.
>>> https://github.com/DevonMcC/J/bmks.ijs).
>>> 
>>>> On Fri, Oct 8, 2021 at 9:44 PM bill lam <bbill.lam at gmail.com> wrote:
>>> 
>>>> You can try using the open verb, eg
>>>> 
>>>> open '..your file...'
>>>> 
>>>> 
>>>> On Sat, Oct 9, 2021, 7:26 AM Raoul Schorer <raoul.schorer at gmail.com>
>>>> wrote:
>>>> 
>>>>> Thank you Michael,
>>>>> 
>>>>> That was done already. The problem was that samsung prevents access
>> to
>>>> part
>>>>> of the filesystem. Fortunately, some apps bypass that and the issue
>> is
>>>> now
>>>>> fixed.
>>>>> 
>>>>> Cheers,
>>>>> Raoul
>>>>> 
>>>>> Le ven. 8 oct. 2021 à 23:30, Michael Dykman <mdykman at gmail.com> a
>>> écrit
>>>> :
>>>>> 
>>>>>> Go into setting - application and find J. It doesn't prompt you but
>>> you
>>>>>> have to grant file access permissions
>>>>>> 
>>>>>> On Fri, Oct 8, 2021, 17:27 Raoul Schorer <raoul.schorer at gmail.com>
>>>>> wrote:
>>>>>> 
>>>>>>> Dear all,
>>>>>>> 
>>>>>>> I have a new Samsung tablet device, and after installing
>> JAndroid I
>>>> was
>>>>>>> surprised to see that the app is completely sandboxed, i.e. can't
>>>> edit
>>>>>> any
>>>>>>> file above '~home'. Additionally, Samsung's Android forbids
>> access
>>> to
>>>>>>> anything under '/Android/data' (where the JAndroid files
>> including
>>>> the
>>>>>> user
>>>>>>> tree are located) without rooting the device. I have enabled
>>> storage
>>>>>> access
>>>>>>> authorization for JAndroid.
>>>>>>> 
>>>>>>> JAndroid itself works ok, but this makes it impossible to edit my
>>>>>> projects
>>>>>>> (loading works). Anyone had that problem before and knows of a
>> fix?
>>>>>>> 
>>>>>>> Cheers,
>>>>>>> Raoul
>>>>>>> 
>>>> ----------------------------------------------------------------------
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>>>>>>> 
>>>>>> 
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>>>>>> 
>>>>> 
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>>>>> 
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>>>> 
>>> 
>>> 
>>> --
>>> 
>>> Devon McCormick, CFA
>>> 
>>> Quantitative Consultant
>>> ----------------------------------------------------------------------
>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>> 
>> ----------------------------------------------------------------------
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>> 
> 
> 
> -- 
> 
> Devon McCormick, CFA
> 
> Quantitative Consultant
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm