Module: Profiler

Defined in:
lib/rails_notebook/profiler.rb

Defined Under Namespace

Classes: Profile, StackProfSampler

Class Method Summary collapse

Class Method Details

.generate_data(stacks) ⇒ Object 



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# File 'lib/rails_notebook/profiler.rb', line 14

def self.generate_data( stacks )
    table = []
    prev = []

    # a 2d array makes collapsing easy
    stacks.each_with_index do |stack, pos|
        next unless stack
        col = []

        stack.reverse.map{|r| r.to_s}.each_with_index do |frame, i|
            if !prev[i].nil?
                last_col = prev[i]
                if last_col[0] == frame
                    last_col[1] += 1
                    col << nil
                    next
                end
            end

            prev[i] = [frame, 1]
            col << prev[i]
        end
        prev = prev[0..col.length-1].to_a
        table << col
    end

    data = []
    # a 1d array makes rendering easy
    table.each_with_index do |col, col_num|
        col.each_with_index do |row, row_num|
            next unless row && row.length == 2
            data << {
                :x      => col_num + 1,
                :y      => row_num + 1,
                :width  => row[1],
                :frame  => row[0]
            }
            end
        end
    data
end

.profile(filename = nil, opts = {}) ⇒ Object 



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# File 'lib/rails_notebook/profiler.rb', line 7

def self.profile(filename=nil, opts = {})
    backtraces = nil;
    fidelity = opts[:fidelity]  || 0.05
    backtraces = StackProfSampler.collect( fidelity ) do yield end
    Profiler::Profile.new( Profiler::generate_data( backtraces ) , fidelity )
end