Hi Jakob, We were comparing v8/src/builtins.h file of Chromium M47 and Chromium M56 and found that there many new (>100) builtin functions added in Chromium 56.
Do you think this could be one of the major reasons for increase in size of Snapshot_blob.bin file ? Thanks On Monday, December 18, 2017 at 12:54:34 PM UTC+5:30, Jakob Gruber wrote: > > On Mon, Dec 18, 2017 at 6:20 AM, <uzair....@samsung.com <javascript:>> > wrote: > >> >* new functionality (both internal and new language additions); >> >> Is it possible to find out what new functionality has been added?( If >> yes please can you let me know where to check for new features added ?) >> > > For new language features, you could watch > https://github.com/tc39/proposals to track TC39 proposal status. New V8 > developments are sometimes called out on the V8 blog, but the only way to > get a complete picture is to follow the git commit log. > > >> >> Thanks >> >> On Thursday, December 14, 2017 at 3:24:36 PM UTC+5:30, Jakob Gruber wrote: >> >>> On Thu, Dec 14, 2017 at 10:39 AM, <uzair....@samsung.com> wrote: >>> >>>> On Thursday, December 14, 2017 at 2:44:15 PM UTC+5:30, Ben Noordhuis >>>> wrote: >>>>> >>>>> On Thu, Dec 14, 2017 at 7:22 AM, <uzair....@samsung.com> wrote: >>>>> > 1) How is snapshot_blob.bin generated at compile time ? (If possible >>>>> where >>>>> > in chromium code ) >>>>> >>>>> Look for a file called mksnapshot.cc in v8/src/snapshot. >>>>> >>>>> > 2) Is it possible to reduce the size of snapshot_blob.bin ? (if yes >>>>> where in >>>>> > chromium code do we do it and will it have any performance >>>>> regression ?) >>>>> >>>>> You could disable internationalization (v8_enable_i18n_support=0) but >>>>> that's about it. It won't affect performance but the Intl JS object >>>>> will have only bare-bones functionality. >>>>> >>>>> You can disable the snapshot entirely (v8_use_snapshot=0) but that >>>>> does have a performance impact because it shifts the cost of >>>>> construction to Context::New(). Expect that function to slow down by >>>>> 5-10x. >>>>> >>>> >>>> Hi Ben, >>>> >>>> Thanks for the reply :) >>>> >>>> We disabled v8_enable_i18n_support and size of snapshot_blob.bin has >>>> reduced by 20KB. >>>> >>>> But is there any way to find out the reason for increase ? >>>> >>> >>> There's a bunch of reasons, but mainly: >>> >>> * new functionality (both internal and new language additions); >>> * and the increasing use of CodeStubAssembler >>> <https://v8project.blogspot.de/2017/11/csa.html> to write shipped code >>> (vs. implementing builtins >>> as self-hosted JS, shipping the source files and compiling at runtime). >>> >>> > Our current aim is to reduce the size of binary. >>> >>> I suppose this is the binary in decompressed form, and not something >>> like an APK? It'd theoretically >>> be possible to support loading from compressed snapshot blobs (for >>> roughly 1MB savings), but this >>> is not implemented currently. >>> >> -- >> -- >> v8-users mailing list >> v8-u...@googlegroups.com <javascript:> >> http://groups.google.com/group/v8-users >> --- >> You received this message because you are subscribed to the Google Groups >> "v8-users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to v8-users+u...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > Jakob Gruber > > Software Engineer > > jgr...@google.com <javascript:> > > Google Germany GmbH > > Erika-Mann-Straße 33 > > 80636 München > > Geschäftsführer: Paul Manicle, Halimah DeLaine Prado > > Registergericht und -nummer: Hamburg, HRB 86891 > > Sitz der Gesellschaft: Hamburg > > Diese E-Mail ist vertraulich. Falls sie diese fälschlicherweise erhalten > haben sollten, leiten Sie diese bitte nicht an jemand anderes weiter, > löschen Sie alle Kopien und Anhänge davon und lassen Sie mich bitte wissen, > dass die E-Mail an die falsche Person gesendet wurde. > > > This e-mail is confidential. If you received this communication by > mistake, please don't forward it to anyone else, please erase all copies > and attachments, and please let me know that it has gone to the wrong > person. > -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
