Shot in the dark, but dependent namespace compilation may be the source of
your CLJS compiler slowdowns if you have tons of namespaces. Try seeing
what happens when you set :recompile-dependents to false in the CLJS
compiler options.
On Wednesday, August 23, 2017 at 11:54:44 AM UTC-4, Maarten Truyens wrote:
>
> Hi all,
>
> My codebase (mix of CLJ, CLJS and CLJS) is about fifty thousand lines of
> code, and compilation times are starting to interfere with my workflow
> happiness. In addition, Chrome Devtools is becoming somewhat sluggish due
> to the high number of separate namespaces loaded through Figwheel.
>
> My current machine is a 6-core Mac Pro 3.5 Ghz Xeon ("late 2013"). For
> quite a while I have been investigating whether a switch to another machine
> and/or platform would be interesting from a workflow speed point of view.
> However, aside from Timothy Pratley's article on the AMD Ryzen 1800x (
> http://timothypratley.blogspot.in/2017/03/ryzen-is-for-programmers.html),
> I have trouble finding information that is relevant for us Clojure
> programmers.
>
> I would summarize my research as follows:
> * single-core performance is most important, so that it is probably the
> case that a 4-core CPU with a higher single-thread speed is preferable to
> an 6/8/10-core CPU with a slower single-thread speed;
> * as from 4 cores, there are hardly any speedups to be expected for having
> more cores in CLJ or even (parallel) CLJS builds;
> * the Ryzens are great value, but their single-core performance is usually
> 10-20% below the top of the line Intels;
> * according to the many Phoronix benchmarks, Linux and OSX have about the
> same performance, although there are some interesting deviations for some
> workflows (even up to 30 - 40%);
> * the single-core performance difference between my current CPU and the
> single-core top of the line (i7700K, i7-7800X or i7-7820X) seems to be
> between 20-40%
>
> While a 50% performance increase would be enough to warrant the time
> investment & cost of switching, my fear is that the real-world speed-up
> will probably be more like a meager 20%.
>
> Ignoring cost considerations and performance outside CLJ development: what
> CPU and platform would you recommend?
>
> Many thanks!
>
> Maarten
>
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