socket: Socket#connect_nonblock avoids arg parsing with C API

* ext/socket/socket.c (sock_connect_nonblock):
  avoid argument parsing in C.
  [ruby-core:71439] [Feature #11339]
* ext/socket/lib/socket.rb (Socket#connect_nonblock):
  new wrapper for private method, move RDoc

target 0: a (ruby 2.3.0dev (2015-11-12 trunk 52540) [x86_64-linux])
target 1: b (ruby 2.3.0dev (2015-11-12 avoid-kwarg-capi 52540) [x86_64-linux]

-----------------------------------------------------------
connect_nonblock

require 'tempfile'
require 'socket'
require 'io/wait'
nr = 500000
Tempfile.create(%w(connect_nonblock .sock)) do |tmp|
  path = tmp.path
  File.unlink(path)
  s = UNIXServer.new(path)
  addr = Socket.sockaddr_un(path).freeze
  nr.times do
    c = Socket.new(Socket::AF_UNIX, Socket::SOCK_STREAM)
    while c.connect_nonblock(addr, exception: false) == :wait_writable
      c.wait_writable
    end
    s.accept.close
    c.close
  end
end

-----------------------------------------------------------
raw data:

[["connect_nonblock",
  [[4.014209181070328,
    3.8479955345392227,
    3.981342639774084,
    4.471840236335993,
    3.7867715656757355],
   [3.639054525643587,
    3.58337214961648,
    3.525284394621849,
    3.52646067738533,
    3.511393066495657]]]]

Elapsed time: 37.889623996 (sec)
-----------------------------------------------------------
benchmark results:
minimum results in each 5 measurements.
Execution time (sec)
name             a       b
connect_nonblock   3.787   3.511

Speedup ratio: compare with the result of `a' (greater is better)
name             b
connect_nonblock   1.078

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52600 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

0 files changed, 0 insertions, 0 deletions