cfis : Must Read Rails Performance Article

Comment on Must Read Rails Performance Article by Bob

Sat, 02 Feb 2008 22:08:53 -0700

I assume multiple “excepted”s should be “accepted”s.

Comment on Must Read Rails Performance Article by Charlie

Sun, 03 Feb 2008 12:20:20 -0700

Bob,

Yes, good catch. Thanks and fixed.

Comment on Must Read Rails Performance Article by Aristus

Mon, 04 Feb 2008 15:58:42 -0700

Any tips on how to install/compile these patches? I’ve patched the ruby binary and installed ruby-prof-0.6.0 from gem, but RubyProf::MEMORY still evaluates to nil.

Comment on Must Read Rails Performance Article by Charlie

Mon, 04 Feb 2008 21:33:09 -0700

Hi Aristus,

The problem is in line 28 of measure_memory.h:

if defined(HAVE_RB_GC_ALLOCATED_SIZE)

But that constant is not defined in Alex’s patch.

So just uncomment out that #if and it should hopefully work. And I’ll ask Alex about it.

Comment on Must Read Rails Performance Article by Alexander Dymo

Sun, 10 Feb 2008 06:55:39 -0700

Aristus, to have memory profiler you need to install patched ruby, then make sure the patched ruby interpreter is in the path and build ruby-prof gem.

extconf.rb in the gem should take care of defining HAVE_RB_GC_ALLOCATED_SIZE thing.

If that doesn’t happen, you can fetch ruby-prof sources from svn trunk and do

    cd ext
    ruby extconf.rb
    make
    cd ..
    rake gem
    cd pkg
    gem install ruby-prof-0.6.0.gem

or something like this.

See my memory profiling article for more details: http://blog.pluron.com/2008/02/memory-profilin.html