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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Any good package for mathematical function in Ada?
Date: Mon, 1 Jun 2020 15:37:45 +0200
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Xref: reader01.eternal-september.org comp.lang.ada:58923
Date: 2020-06-01T15:37:45+02:00
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On 01/06/2020 13:52, Nasser M. Abbasi wrote:
> On 6/1/2020 6:34 AM, Dmitry A. Kazakov wrote:
> 89122152724401671806000989156340
>>>
>>> Want 1,000 digits? 2,000 digits? all can be done.
>>
>> In how many microseconds?
> 
> In my PC, intel i-7-8086K CPU, 4 GHZ, it takes 6.2*10^-7 second
> for 20,000 digits (I put ";" to prevent the 20,000 digits from
> being printed on screen)
> 
> In[20]:= RepeatedTiming[N[BesselJ[0,1],20000];]
> Out[20]= {6.2*10^-7,Null}
> 
> "RepeatedTiming[expr] evaluates expr repeatedly and returns a list of
> the average time in seconds used, together with the result obtained.
> "

It looks too good, though I do not know the method used.

As a reference, GSL takess 34ns on a bit faster i9 machine.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de