[Jprogramming] Composition conjunctions

[Louis de Forcrand]

Beyond wether these tests are useful or not, you should run "ts" with a left argument, as a single run which lasts only 0.1 seconds can be somewhat imprecise.
ts's left argument n is the number of times to run the string of code, and its result will be the total time elapsed divided by n.

Cheers,
Louis

> On 2 Oct 2017, at 19:51, Erling Hellenäs <erling at erlinghellenas.se> wrote:
> 
> Hi all!
> 
> If something is not interesting or important, a good general idea could be to not spend forum time on lengthy  discussions about it?
> Normally, if I get spammed like this, I would assume that what I said WAS important, and I'd repost it and write more about it. However, since this is a proprietary mail list I will have to leave that to the  readers.
> 
> Cheers,
> Erling
>> On 2017-10-02 19:26, Don Guinn wrote:
>> Detailed measurements are useful and meaningful if your application is
>> performing badly. But general statements about poor performance in parts of
>> an application that isn't used much is a waste of time.
>> 
>> @ vs. @: is a concern but blanket proclamations is wrong. Today @ performs
>> better than @: most of the time, especially for primitives. But for defined
>> verbs, depending on the design, there may be no performance gain and a lot
>> of wasted memory.
>> 
>> If you have an app with a performance problem then run a tool to find out
>> where you're spending the time. J has such a tool, as do almost all
>> programming languages. Now you know where to spend your time.
>> 
>> And you may find out that the problem is not in J, but in your design.
>> 
>> There is no argument that @ has much room for improvement. Which seems to
>> be what your beef is about. So you're wasting your time and everybody
>> else's time proving the obvious.
>> 
>>> On Oct 2, 2017 10:06 AM, "Erling Hellenäs" <erling at erlinghellenas.se> wrote:
>>> 
>>> You are welcome to show us better measurements if you think these
>>> measurements are very important and worthy of a lengthy discussion in the
>>> forum. /Erling
>>> 
>>>> On 2017-10-02 17:53, Raul Miller wrote:
>>>> 
>>>> The null case here should be ]
>>>> 
>>>>     (- at - -: ]) v
>>>> 1
>>>> 
>>>> Thanks,
>>>> 
>>>> 
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