gistfile1.txt

class GCEvent < Struct.new(:name, :before, :after, :total, :time)
end

def tally(name)
  $gc_events.inject(0) do |memo, event|
    memo += event.time if event.name == name
    memo
  end
end

$gc_events = []

# Java 5/6 with -XX:+PrintGCDetails
# [GC [DefNew: 9536K->1149K(9536K), 0.0124713 secs] 11235K->4168K(31424K), 0.0125142 secs] [Times: user=0.01 sys=0.00, real=0.02 secs] 

SIZE = '(\d+)([KM])'
BEFORE_AFTER_TOTAL = "#{SIZE}->#{SIZE}\\\(#{SIZE}\\\)"
GC = "GC\\\s+\\\[([^:]+):\\\s+#{BEFORE_AFTER_TOTAL}, #{TIME}"

while(line = $stdin.gets)
  if line =~ /^\[(Full )?GC\s+\[([^:]+):\s+(\d+)([KM])->(\d+)([KM])\((\d+)([KM])\),\s+([\.\d]+)\s+secs\]\s+(\d+)([KM])->(\d+)([KM])\((\d+)([KM])\),\s+([\.\d]+)\s+secs\]/
    $gc_events << GCEvent.new($2.to_sym, $3.to_i, $5.to_i, $7.to_i, $9.to_f)
    $gc_events << GCEvent.new(:Entire, $10.to_i, $12.to_i, $14.to_i, $16.to_f)
  end
end

puts "new: #{tally(:DefNew)}\ntotal: #{tally(:Entire)}"