On Tue, 06 Jun 2006, Thomas E Enebo defenestrated me: > On Tue, 06 Jun 2006, Ola Bini defenestrated me: > > > > I did a simple runhprof on JRuby while doing gem install rake, which > > first downloads the 3.5mb gemspec and then the 76kb Rake-gem. > > The result was this: as far as I can understand this, it seems we're > > blocking really, really, really much. > > (That throwable is ONE InterruptedException, by the way... So that isn't > > cheap either) > > > > Well, enjoy. I'm going to bed! =) > > Thanks for this, I did notice something was amiss and figured it > was only blocking initially...It looks like it may be much more than that. > Something to dig into...perhaps gems install times will rival ruby by the > end of this week... :)
I have not figured this out yet, but I will say that the number of read calls may or may not be as Ruby wants. net/http will read in 1024 bytes at a time from the network. This number seems low to me it is not even a full MTU. So we honor this and also only read in 1k at a time. If the gem you were installed was large, then you will see many many reads happening. We can probably be more aggressive internally, but I am not sure how much this will help yet. So I wrote a simple test which uses net/http the same way as gems and I put some prints everytime we called sysread in RubyBasicSocket. Those come out at a decent clip and then stop for quite a while before finishing. What returns appears to be one stringio object. I am wondering if we are seeing the same thing that we saw before when we had RubyString backed by a String and not a StringBuffer. I do have plans to rewrite StringIO in java, but not in the next couple of days. If it is some super slow string concat string thing then we may be able to get some time back by examining how we are implementing some of the stringio ops. I will look more this evening... -Tom -- + http://www.tc.umn.edu/~enebo +---- mailto:[EMAIL PROTECTED] ----+ | Thomas E Enebo, Protagonist | "Luck favors the prepared | | | mind." -Louis Pasteur | _______________________________________________ Jruby-devel mailing list Jruby-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jruby-devel
