[sup-devel] [PATCH] enable ruby-prof with SUP_PROFILE environment variable

[Rich Lane <rlane@club.cc.cmu.edu>]

If SUP_PROFILE is set, it's used as the filename to dump profiling output
which you can use kcachegrind to inspect.
---
 bin/sup |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/bin/sup b/bin/sup
index 7824aca..f7c4af7 100755
--- a/bin/sup
+++ b/bin/sup
@@ -14,6 +14,11 @@ require 'fileutils'
 require 'trollop'
 require "sup"; Redwood::check_library_version_against "git"
 
+if ENV['SUP_PROFILE']
+  require 'ruby-prof'
+  RubyProf.start
+end
+
 if no_ncursesw
   debug "No 'ncursesw' gem detected. Install it for wide character support."
 end
@@ -379,6 +384,11 @@ ensure
   end
 
   Index.unlock
+
+  if (fn = ENV['SUP_PROFILE'])
+    result = RubyProf.stop
+    File.open(fn, 'w') { |io| RubyProf::CallTreePrinter.new(result).print(io) }
+  end
 end
 
 unless Redwood::exceptions.empty?
-- 
1.6.3.3

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