drawcode

Unity Performance Checklist

Table of Contents

• Main Performance Impacts to Games Built on Unity Engine
  • CPU Bottlenecks
  • GPU Bottlenecks
• Memory Bottlenecks

drawcode

#include <iostream>
#include <string>
#include <vector>
#include <regex>
#include <functional>

/// @brief Replaces occurrences of a regular expression pattern in a string with a replacement string.
///
/// @param input The string to search in.
/// @param pattern The regular expression pattern to match.

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// create basic cplusplus main

#include <iostream>
#include <vector>
#include <string>

using namespace std;

int main()
{

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/**
 * Different case matchers
 *
 * @see <a href="https://en.wikipedia.org/wiki/Naming_convention_(programming)#Examples_of_multiple-word_identifier_formats">Examples of multiple word identifier formats</
 */
sealed class CaseMatcher(private val regex: Regex) {
    open fun notMatches(source: String?): Boolean {
        return !matches(source)
    }

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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

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Problem

I have two Github accounts: oanhnn (personal) and superman (for work). I want to use both accounts on same computer (without typing password everytime, when doing git push or pull).

Solution

Use ssh keys and define host aliases in ssh config file (each alias for an account).

How to?

1. Generate ssh key pairs for accounts and add them to GitHub accounts.

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Even tho Unity has implemented a game-center api (Social api) it doesn't have a way to generate a verification signature, which you need to use game-center as a authentication method.

Luckily the objective-c code required is pretty straight forward. (Apple documentation: generateIdentityVerificationSignature)

#import <Foundation/Foundation.h>
#import <GameKit/GameKit.h>

typedef void (*IdentityVerificationSignatureCallback)(const char * publicKeyUrl, const char * signature, int signatureLength, const char * salt, int saltLength, const uint64_t timestamp, const char * error);

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This version completely strips the page.

javascript:(function(){var n=document.getElementsByClassName('Box-body')[0].cloneNode(true);document.body.children[0].remove();document.body.appendChild(node);node.style.borderBottom = 'none';})();

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## Pre-requisite: You have to know your last commit message from your deleted branch.
git reflog
# Search for message in the list
# a901eda HEAD@{18}: commit: <last commit message>

# Now you have two options, either checkout revision or HEAD
git checkout a901eda 
# Or
git checkout HEAD@{18}

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# delete local tag '12345'
git tag -d 12345
# delete remote tag '12345' (eg, GitHub version too)
git push origin :refs/tags/12345
# alternative approach
git push --delete origin tagName
git tag -d tagName