percentile

percentile.rb

#!/usr/bin/env ruby

def parse_line line
	fields = line.split
	return fields[1], fields[3]
end

def percentile(level, values)
	return values.sort[values.length*level/100]	
end

stat = Hash.new

STDIN.each{|line|
	key, value = parse_line(line)
	if stat.has_key?(key) 
		stat[key] << value.to_i
	else
		stat[key] = Array.new << value.to_i
	end
}

	
stat.each_pair{|k,v|
	puts "#{k}\t#{v.length}\t#{percentile(ARGV[0].to_i, v)/1000} ms"
}