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require 'benchmark'
require 'ffi'
iter = 100000
module Posix
extend FFI::Library
attach_function :getuid, [], :uint
end
puts "uid=#{Process.pid} Posix.getuid=#{Posix.getuid}"
puts "Benchmark FFI getuid performance, #{iter}x calls"
10.times {
puts Benchmark.measure {
iter.times { Posix.getuid }
}
}
puts "Benchmark FFI Invoker#call0() getuid performance, #{iter}x calls"
invoker = FFI.create_invoker(nil, 'getuid', [], :uint)
10.times {
puts Benchmark.measure {
iter.times { invoker.call0() }
}
}
puts "Benchmark Process.uid performance, #{iter}x calls"
10.times {
puts Benchmark.measure {
iter.times { Process.uid }
}
}
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