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    • mikhail.naganov@gmail.com's avatar
      Add initial version of retainers heap profile. · abc0bd46
      mikhail.naganov@gmail.com authored
      The profile is taken together with constructors profile. In theory, it
      should represent a complete heap graph. However, this takes a lot of memory,
      so it is reduced to a more compact, but still useful form. Namely:
      
       - objects are aggregated by their constructors, except for Array and Object
         instances, that are too hetereogeneous;
      
       - for Arrays and Objects, initially every instance is concerned, but then
         they are grouped together based on their retainer graph paths similarity (e.g.
         if two objects has the same retainer, they are considered equal);
      
      Review URL: http://codereview.chromium.org/200132
      
      git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2903 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
      abc0bd46
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    • mikhail.naganov@gmail.com's avatar
      Implement a dynamically growing memory log buffer with an upper limit. · e48095b8
      mikhail.naganov@gmail.com authored
      The goal of this change is to allow longer profiling sessions and preserve memory when profiler isn't started. The buffer starts with 64K and grows until it reaches the upper limit, which is currently set to 50MB --- according to my evaluations, this is enough for at least 20 minutes of GMail profiling. As we're planning to introduce compression for the profiler log, this time boundary will be significantly increased soon.
      
      To make possible unit testing of the new component, I've factored out Logger's utility classes into a separate source file: log-utils.h/cc. Log and LogMessageBuilder are moved there from log.cc without any semantical changes.
      
      Review URL: http://codereview.chromium.org/115814
      
      
      git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2067 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
      e48095b8
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