Class: Roby::CLI::Log::FlamegraphRenderer

Inherits:
Object
  • Object
show all
Defined in:
lib/roby/cli/log/flamegraph_renderer.rb

Instance Method Summary collapse

Constructor Details

#initialize(stacks) ⇒ FlamegraphRenderer

Returns a new instance of FlamegraphRenderer.



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# File 'lib/roby/cli/log/flamegraph_renderer.rb', line 10

def initialize(stacks)
    @stacks = stacks
end

Instance Method Details

#graph_data ⇒ Object 



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# File 'lib/roby/cli/log/flamegraph_renderer.rb', line 29

def graph_data
    table = []
    prev = []

    x = 0
    # a 2d array makes collapsing easy
    @stacks.each_with_index do |(stack, duration), pos|
        col = []
        stack.each_with_index do |frame, i|
            if (last_col = prev[i]) && (last_col[0] == frame)
                last_col[1] += duration
                col << nil
            else
                prev[i] = [frame, duration]
                col << prev[i]
            end
        end
        prev = prev[0..col.length - 1].to_a
        table << [x, col]
        x += duration
    end

    data = []

    # a 1d array makes rendering easy
    col_num = 0
    table.each do |x, col|
        col.each_with_index do |row, row_num|
            next unless row && row.length == 2

            data << {
                x: x + 1,
                y: row_num + 1,
                width: row[1],
                frame: row[0]
            }
            col_num += row[1]
        end
    end

    data
end

#graph_html(embed_resources: false) ⇒ Object 



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# File 'lib/roby/cli/log/flamegraph_renderer.rb', line 14

def graph_html(embed_resources: false)
    body = read("flamegraph.html")
    body.sub! "/**INCLUDES**/",
              if embed_resources
                  embed("jquery.min.js", "d3.min.js", "lodash.min.js")
              else
                  '<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.0.8/d3.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/1.3.1/lodash.min.js"></script>'
              end

    body.sub!("/**DATA**/", ::JSON.generate(graph_data))
    body
end