On Sat, 2016-05-14 at 16:36 +0000, ciechowoj via Digitalmars-d-learn wrote: > On Monday, 7 March 2016 at 21:56:11 UTC, Seb wrote: > > > > Use ld.gold - it will speed up your linking quite dramatically! > > > > https://code.dawg.eu/reducing-vibed-turnaround-time-part-1-faster-l > > inking.html > Thanks, it improves things a little. However I've just had idea > that it should be possible to implement 'speculative dependency > checking' for dub. What I mean by that is to start build process > and dependency checking in parallel and then if something changes > (with dependencies), apply the changes and restart the build > process, and if dependencies are OK continue.
Anecdotal evidence from SCons, Gant, Gradle, Rant, and indeed Make, seems to indicate that full dependency resolution in the ADG of the build is the right thing to do for consistent and repeatable builds. Various debates have been had in the SCons and Gradle communities over the years about slow builds, and always, in the end, dependency resolution up front has always won out. Interestingly though "dependency resolution" actually has slightly different meanings in different contexts. In the SCons context it is about ensuring the ADG of the source → object → executable|library and the presence of any referenced libraries. In the Ant/Maven/Gant/Gradle context is is about downloading references libraries and ensuring the ADG of build tasks is right. In all cases building the ADG and constructing the resolution list is not the big problem except in very, very large builds. For example folk at Intel created Parts as a layer over SCons so as to parallelize and create partial caches for the build, a bit along the lines of Vesta but far better. I cannot be certain, but I am not sure there are any D codebases quite the same size as the Intel C++ ones. With SCons and Gradle there were various algorithmic and implementation speedups to ameliorate things and that has helped a lot. I wonder if there are opportunities to do the same for Dub. There are many functionality things that need to be added to Dub to get it into the Cargo and Gradle end of functionality mayhap performance can be improved along the way. I am not sure about DStep build, but for the two projects I have (using GtkD) build times using Dub were sufficiently long that I switched to SCons and it is OK and allows for a reasonable development rhythm. -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:russel.win...@ekiga.net 41 Buckmaster Road m: +44 7770 465 077 xmpp: rus...@winder.org.uk London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder
signature.asc
Description: This is a digitally signed message part
