Thanks for the detailed answer. Does it somewhat mean that splitting code into smaller namespaces can achieve faster compilation thanks to parallelization ?
On Fri, Jan 17, 2020 at 10:43 AM Thomas Heller <[email protected]> wrote: > It depends on the namespaces used. In general a CLJS namespaces can only > be compiled once all its dependencies have been compiled. So if those > dependendencies can be compiled in parallel they will use multiple threads > from a pool, which should keep all cores busy. In my experience a good > balance between core count and core speed matters. If you have big > namespaces that a lot of other namespaces depend on (eg. like cljs.core) > then its compilation will "block" all other threads so its important it > finishes fast (ie. fast cores). If you have lots a small namespaces that > are mostly independent then you can get maximum parallelization (ie. many > cores). > > I have a i7-8700K 6c and there are builds that aren't able to use all > cores due to the namespace setup (few very large ones). Others happily use > everything. Single core difference is gigantic to my previous CPU from a > macbook pro 2016. > > If you really really want to torture your CPU you can try > https://github.com/mfikes/fifth-postulate or > https://github.com/mfikes/coal-mine to compare. > > HTH, > Thomas > > On Friday, January 17, 2020 at 5:29:06 AM UTC+1, Khalid Jebbari wrote: >> >> Hello, >> >> We're using the parallel build option, and I noticed the difference in >> speed between my laptop and other laptops is basically proportional to the >> difference in speed of the CPUs (based on notebookcheck's benchmarks). I >> have 4C/8T 7700HQ CPU and my colleagues have a 8565U iirc (some have the >> 6600U). Mine is almost twice as fast in benchmarks, which is reflected in >> cljs compilation times. >> >> So my question is how does the cljs compiler scale with regards to CPU? >> Core count? Single thread perf? All cores frequencies? Is it capped to some >> number of cores? >> >> -- > Note that posts from new members are moderated - please be patient with > your first post. > --- > You received this message because you are subscribed to a topic in the > Google Groups "ClojureScript" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/clojurescript/PwpVJNrF0Zc/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/clojurescript/7a967f70-995e-49d3-9b25-a5b327689736%40googlegroups.com > <https://groups.google.com/d/msgid/clojurescript/7a967f70-995e-49d3-9b25-a5b327689736%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- Note that posts from new members are moderated - please be patient with your first post. --- You received this message because you are subscribed to the Google Groups "ClojureScript" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/clojurescript/CAM3R3BARm8m08%3DA1aSN%2B3rW9E0DUNGyuzyWgGTmf5fscGnFjpA%40mail.gmail.com.
