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Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

Force RGB Color on M1 Mac

How to Force RGB Color Output instead of YPbPr on your M1 Apple Silicon Mac for an External Monitor.

This step-by-step video tutorial will guide you through the procedure of forcing RGB color output on your M1 Mac.

Here is the direct link to the video tutorial: https://www.youtube.com/watch?v=Z1EqH3fd0V4

The video also has Closed Captions (Subtitles) that you can enable, to make it easier to follow if needed.

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

Ctrl-Key: ^[
Octal: \033
Unicode: \u001b
Hexadecimal: \x1B
Decimal: 27

GIT

Estados

Modificado (modified);
Preparado (staged/index)
Consolidado (comitted);

Ajuda

MS-MSDT 0-day Office RCE

MS Office docx files may contain external OLE Object references as HTML files. There is an HTML sceme "ms-msdt:" which invokes the msdt diagnostic tool, what is capable of executing arbitrary code (specified in parameters).

The result is a terrifying attack vector for getting RCE through opening malicious docx files (without using macros).

Here are the steps to build a Proof-of-Concept docx:

Open Word (used up-to-date 2019 Pro, 16.0.10386.20017), create a dummy document, insert an (OLE) object (as a Bitmap Image), save it in docx.

	1a:0d:78:24:96:30:e4:91:ee:1c:48:b6:1c:ca:c2:c7	455170
	d8:0e:4d:d3:d7:00:d7:aa:8f:69:9f:ec:af:90:b3:16	132730
	2f:1c:34:c9:4c:56:12:6c:ce:f2:10:ee:0f:3e:41:fe	44924
	6d:d5:3a:e0:17:75:7a:61:8f:85:c0:fc:b2:59:69:db	38746
	8b:75:88:08:41:78:11:5b:49:68:11:42:64:12:6d:49	31444
	78:e3:c6:d0:2d:4c:f8:3e:87:8c:bf:34:d6:72:6f:46	20839
	c4:7a:4e:5c:36:d0:12:42:1b:3f:2d:96:28:ec:4e:5d	17815
	3e:75:5f:41:69:d1:67:42:5e:d1:03:db:c8:04:90:84	17149
	e5:f0:4b:35:d1:61:e4:c1:4d:6c:76:41:30:fb:53:ff	16576
	18:f1:bf:c6:bd:54:0c:d6:8d:5c:d8:88:9a:76:81:24	15983

	#/bin/bash -xe

	systemctl stop pvestatd.service
	systemctl stop pvedaemon.service
	systemctl stop pve-cluster.service
	systemctl stop corosync
	systemctl stop pve-cluster

	sqlite3 /var/lib/pve-cluster/config.db "delete from tree where name = 'corosync.conf';"

	#!/bin/bash
	# The following commands should install openvpn3 successfully on Kali Linux as of 2023-10-11
	# Please check libssl1.1 version is newest at https://packages.debian.org/bullseye/amd64/libssl1.1
	# PM me if broken and I will update

	# Thanks to the following for bug reports / additions
	# asingh-lp, Pyr0technicien

	# update packages
	sudo apt update

	<script>
	// For a HighLevel webpage (funnel or website) that is meant to be a dedicated chatting area.
	// Copy all of this and paste into your custom code, such as in the Footer Tracking area.
	// This snippet: https://gist.github.com/cliffordp/1428be81a842d5b93c793d2d5b967007
	// Source demo: https://10xmarketing.ai/10x-chatbot-widget
	function openChatWidget() {
	// Check if Chat Widget exists.
	if (window.leadConnector && window.leadConnector.chatWidget) {
	// If it exists, open it.
	window.leadConnector.chatWidget.openWidget();

	export type PusherEvents = {
	// 'channel.id';
	channel: {
	FollowersUpdated: {
	followersCount: string \| number
	channel_id: number
	username: unknown
	created_at: number
	followed: boolean
	}