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@@ -21,6 +21,7 @@
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   opts.on("-e", "--end N", "Last concurrency level")            { |n| options[:end] = n.to_i }
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   opts.on("-S", "--step N", "Concurrency level step")           { |n| options[:step] = n.to_i }
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   opts.on("-u", "--uri PATH", "Path to send to")                { |u| options[:uri] = u }
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+  opts.on("-k", "--keep-alive", "Use Keep-Alive")               { options[:keep_alive] = true }
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   opts.on_tail("-h", "--help", "Show this message")     { puts opts; exit }
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 end.parse!(ARGV)
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@@ -31,7 +32,7 @@
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 c = options[:start]
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 until c >= options[:end]
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   sleep 0.5
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-  out = `nice -n20 ab -k -c #{c} -n #{options[:requests]} #{options[:address]}:#{options[:port]}/#{options[:uri]} 2> /dev/null`
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+  out = `nice -n20 ab #{'-k' if options[:keep_alive]} -c #{c} -n #{options[:requests]} #{options[:address]}:#{options[:port]}/#{options[:uri]} 2> /dev/null`
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   r = if requests = out.match(/^Requests.+?(\d+\.\d+)/)
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     requests[1].to_i