On Fri, Mar 8, 2013 at 11:44 AM, Sven Van Caekenberghe <[email protected]> wrote:
> > On 08 Mar 2013, at 13:09, Camillo Bruni <[email protected]> wrote: > > > On 2013-03-08, at 11:53, Sven Van Caekenberghe <[email protected]> wrote: > > > >> On 08 Mar 2013, at 11:16, Sven Van Caekenberghe <[email protected]> wrote: > >> > >>> But I have said this before: the wall clock time of loading a lot of > code is actually close to unacceptable - I don't think it is the download > or the compilation, but more all the dynamic stuff that happens after that. > There should be a way to not do all those updates for each method and move > the updates to one big batch update after the load - if that is possible. > >> > >> To continue my rant (sorry ;-) about the problem with slow code loading. > >> > >> These are some benchmarks on the same machine: > >> > >> $ ./vm.sh experimental.image eval '[Smalltalk allClassesAndTraits do: > #compileAll] timeToRun' > >> 106532 > >> > >> $ ./stack/vm.sh experimental.image eval '[Smalltalk allClassesAndTraits > do: #compileAll] timeToRun' > >> 221708 > >> > >> So it takes like 3 minutes to recompile every method in the system. > >> > >> How in the hell can it take 40 minutes to load some code (with all > packages already present in the package-cache (but then again the > package-cache is only 3.5 Mb, which could be downloaded in seconds)) ? > > > > I with you on this one! :D I always wondered what Metacello and Compiler > do there! :D > > Well, open the Time Profiler and load your favourite Config. You'll have a > hard time finding the actual time slice of the compiler. As far as I could > see in my run it was less than 1% ! All the rest MC, Gofer, RPackage and > SystemAnnouncement stuff, even completion stuff. > > Indeed, we noticed this as well when benchmarking Tanker to replace source compilation in Monticello. We got to a similar conclusion. Quite a challenge to optimize if you ask me. > > - Batch notifications: do not do a notification per method/class added. Instead do one notification with all the methods/classes together. -- Mariano http://marianopeck.wordpress.com
