Yeah I understand that tradeoff. I cherrypicked a case where the runtime
difference would be tiny but others are harder I’m sure.
I guess I will go figure out how spec applies to my project.
Thanks as always. This group is so responsive. Appreciated.
- Paul
> On Dec 5, 2016, at 9:46 PM, James Reeves <ja...@booleanknot.com> wrote:
>
> On 6 December 2016 at 01:28, <p...@pwjw.com <mailto:p...@pwjw.com>> wrote:
> And the error messages are not good.
>
> So I was wondering: Is this a philosophical thing? Or is it an effort thing?
> And if it is an effort thing, is there some sort of plan for what effort to
> put in? And if so, can I help by closing tickets?
>
> This is an issue that's been discussed often.
>
> The fundamental problem is that in a dynamically typed language, good error
> messages are often at odds with runtime performance. The more checks we add
> to catch specific scenarios, or to provide more descriptive scenarios, the
> more performance tends to be impacted.
>
> However, Clojure 1.9.0 may have a solution to that in the form of specs. We
> can turn on specs selectively at development time, so we get the benefit of
> detailed error messages, while in production we can turn them off for
> performance.
>
> - James
>
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