Heap visualizer for Ruby
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bin
ext/heapfrag
test
.autotest
.gitignore
CHANGELOG.rdoc
Gemfile
Manifest.txt
README.markdown
Rakefile
demo.gif

README.markdown

Heapfrag

DESCRIPTION:

This is a library for dumping and visualizing your heap in MRI. This code is not for the feint of heart. I don't know what versions of Ruby this will work on, and I make no guarantees about which versions I support or anything. If it doesn't work for you, please send a PR!

This. Is. A. Huge. Hack.

FEATURES/PROBLEMS:

  • All of them

One problem is that the heap dumped as JSON is really big. I'm having problems dumping it fast enough. You can adjust the timer interval when you call Heapfrag.start, so if you have a large heap, then a slower interval might be better.

SYNOPSIS:

In one terminal:

$ ruby bin/heap2raster.rb /tmp/sock

In a different terminal:

$ ruby --disable-gem -Ilib -rsocket -rheapfrag -S irb
irb(main):001:0> Heapfrag.start(500_000, UNIXSocket.open("/tmp/sock"))
=> true
irb(main):002:0> GC.start
=> nil
irb(main):003:0> x = 5000.times.map { Object.new }; nil
=> nil

Hopefully this gif will help:

demo

REQUIREMENTS:

  • opengl
  • glu
  • glut

INSTALL:

You should use this from Git.

bundle install
rake compile:heapfrag

LICENSE:

(The MIT License)

Copyright (c) 2016 Aaron Patterson

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.