havenwood

# ruby-2.5.0
                  user     system      total        real
YAML         15.112795   0.030577  15.143372 ( 15.190573)
JSON          0.648957   0.001520   0.650477 (  0.652856)
Marshal       0.474775   0.000922   0.475697 (  0.477678)
MessagePack   0.326430   0.001763   0.328193 (  0.330159)

# ruby-2.4.3
                  user     system      total        real
YAML         20.400000   0.050000  20.450000 ( 20.517600)

sawanoboly

#!/usr/bin/env ruby
# -*- coding:utf-8 -*-
require 'socket'
require 'openssl'
require 'timeout'
require 'pp'
include OpenSSL

timeout=15

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

Majkl578

class Array
	def heapsort!
		#heapify
		1.upto(self.length - 1) do |i|
			#move up
			child = i
			while child > 0
				parent = (child - 1) / 2
				if self[parent] < self[child]
					self[parent], self[child] = self[child], self[parent]