On Wednesday, March 16, 2016 at 10:22:40 PM UTC+8, Nicholas Nethercote wrote: > Even if we can fix that, it's just a lot of JS code. We can lazily import > JSMs; I wonder if we are failing to do that as much as we could, i.e. are > all these modules really needed at start-up? It would be great if we > could instrument module-loading code in some way that answers this > question.
B2G also did dropping JS source, for Tarako branch, since source is useless for loaded module save for stringify functions. (Gecko compress in-memory source.) But, I am not sure if it was landed on m-c then. > > - "heap-unclassified" memory is 4.5 MiB per process. I've analyzed this with > DMD and this is mostly GTK and glib memory that we can't measure in our > memory reporters. I haven't investigated closely to see if any of this > could > be avoided. > > - "heap-overhead" is 4 MiB per process. I've looked at this closely. > The numbers tend to be noisy. > > - "page-cache" is pages that jemalloc holds onto for fast recycling. It is > capped at 4 MiB per process and we can reduce that with a jemalloc > configuration, though this may make allocation slightly slower. > > - "bin-unused" is fragmentation in smaller allocations and very hard to > reduce. > > - "bookkeeping" is jemalloc's internal data structures and very hard to > reduce. > > - Then there's the not-so-long tail of things less than 1 MiB per process. > Some of these may be shrinkable with effort, or made shareable between > processes with effort. (E.g. I reduced xpti-working-set by 216 KiB per > process in bug 1249174, and I've heard that making it shared was > considered > for B2G but never implemented.) It's getting into diminishing returns, > though. xpti sharing was implemented for B2G. It would be easy to enable them on Linux and Mac, but I am not sure on Windows. I guess preference is worth to be shared too. atoms-table maybe! _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
