sgtcortez

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

/**
 * Function to serialize a unsigned 64 bit number to a byte array
 * The serialization uses Little Endian to store the bytes in the byte array
 * so, the least significant byte(LSB) is the first byte of array, and the 
 * most significant byte(MSB) is the last byte in the array
*/

sgtcortez

• Commands to obtain memory usage by certain key prefix:

redis-cli --scan --pattern "KEY_PREFIX*" | awk '{ print $1 }' | xargs --max-args 1 redis-cli MEMORY USAGE | awk '{total=total + $1} END { print "Total of bytes:", total} '

sgtcortez

#include "Semaphore.hpp"
#include <chrono>
#include <condition_variable>
#include <cstdint>
#include <iostream>
#include <string>

#include <thread>

using namespace std;

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import java.util.concurrent.Semaphore;

public class Resolution {

    private static final int EAT_TIME = 3 * 1000;
    private static final int THINK_TIME = 2 * 1000;
    private static final int WAIT_TIME = 1 * 1000;
    private static final int ITERATIONS_NUMBER = 1000;

sgtcortez

Summary

• Introduction
• Shared-Cache
• False Shared-Cache

Introduction

This gist is inspired on Scott Meyers video about Processor Cache, and why you should care about it.

sgtcortez

import java.util.*;

class ReversePolishCalculator {

    interface Operation {
        int calculate(int a, int b);
    }

    enum MathOperation implements Operation {
        ADD('+') {