lalitmee

local fn = vim.fn
local api = vim.api
local executable = function(e)
  return fn.executable(e) > 0
end

local opts_info = vim.api.nvim_get_all_options_info()

local opt = setmetatable(
                {}, {

raysan5

CUSTOM GAME ENGINES: A Small Study

A couple of weeks ago I played (and finished) A Plague Tale, a game by Asobo Studio. I was really captivated by the game, not only by the beautiful graphics but also by the story and the locations in the game. I decided to investigate a bit about the game tech and I was surprised to see it was developed with a custom engine by a relatively small studio. I know there are some companies using custom engines but it's very difficult to find a detailed market study with that kind of information curated and updated. So this article.

Nowadays lots of companies choose engines like Unreal or Unity for their games (or that's what lot of people think) because d

rigred

How PCI-e bandwidth and actual true data bandwidth can be calculated.

PCI-e 1.x uses an 8/10b encoding scheme, so to send 8 bits of data, 10 bits of encoded data must be transfered. 2 of those bits are there as error checking and correction bits to account for interference which is very common on fast buses. SATA btw also uses 8b/10b encoding, you loose 20% of bandwidth (1-8/10) to get the data across.

PCI-e 1.0 is clocked at 2.5Ghz, it sends 1 bit per clock cycle and each lane corresponds to a 1 bit bi-directional serial channel. Which is kind of neat since here 'Gigatransfers' indicate 1 bit transfered for every clock cycle. This should immediately tell us that unlike FSB which transfers multiple bts per cycle in a parallel fashion, PCI-e is serial, since we are sequentially throwing 1 bit of data per cycle onto the bus and it takes multiple cycles to send a full byte. While on a parallel bus multiple bytes can be sent per cycle.

markpapadakis

unsigned integers

-O3

|               ns/op |                op/s |   MdAPE | benchmark
|--------------------:|--------------------:|--------:|:----------------------------------------------
|                3.03 |      329,748,861.72 |    3.2% | `(a + b) / 2`
|                3.01 |      332,744,047.95 |    4.1% | `a + ((b - a) / 2)`
|                3.01 |      331,690,526.09 |    2.3% | `A/2 + B/2 + (A & B & 1)`
|                3.13 |      318,986,706.11 |    2.3% | `std::midpoint()`

gnumoreno

Pick a scylla version: https://hub.docker.com/r/scylladb/scylla/tags

This tuturial was created with 3.1.0.rc9 on Linux

Create a docker container with scylla

Docker Documentation

docker run --name scylla-si -d scylladb/scylla:3.1.0 --smp 2 --memory 4G

limitedeternity

// FileSaver.min.js
(function(a,b){if("function"==typeof define&&define.amd)define([],b);else if("undefined"!=typeof exports)b();else{b(),a.FileSaver={exports:{}}.exports}})(this,function(){"use strict";function b(a,b){return"undefined"==typeof b?b={autoBom:!1}:"object"!=typeof b&&(console.warn("Depricated: Expected third argument to be a object"),b={autoBom:!b}),b.autoBom&&/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(a.type)?new Blob(["\uFEFF",a],{type:a.type}):a}function c(b,c,d){var e=new XMLHttpRequest;e.open("GET",b),e.responseType="blob",e.onload=function(){a(e.response,c,d)},e.onerror=function(){console.error("could not download file")},e.send()}function d(a){var b=new XMLHttpRequest;return b.open("HEAD",a,!1),b.send(),200<=b.status&&299>=b.status}function e(a){try{a.dispatchEvent(new MouseEvent("click"))}catch(c){var b=document.createEvent("MouseEvents");b.initMouseEvent("click",!0,!0,window,0,0,0,80,20,!1,!1,!1,!1,0,null),a.dispatchEvent(b)}}var f="object"==typeof

nwade

Warning - use at your own risk

Remove SentinelOne agent from Mac

1. Boot into Recovery Mode by holding Cmd+R during reboot
2. Open Terminal from top menubar
3. Run /Applications/Utilities/Disk\ Utility.app/Contents/MacOS/Disk\ Utility to open Disk Utility
4. If your startup disk is encrypted, use Disk Utility to mount it
5. In Terminal, run chroot /Volumes/Macintosh\ HD
6. Execute the deletion commands or script

miguelmota

knowledge dump on container runtimes

KataContainers
- image coupled with kernel 
- light vm layer
- can run in nested virturalization environments if hardware supports and you can enable it in bios (ex. only bare metal EC2 instances, limits many cloud providers)
- slower startup time
- OCI compliant
- previously known as ClearContainers by Intel

mperham

=begin
This script attempts to reproduce poor glibc allocator behavior within Ruby, leading
to extreme memory fragmentation and process RSS bloat.

glibc allocates memory using per-thread "arenas".  These blocks can easily fragment when
some objects are free'd and others are long-lived.

Our script runs multiple threads, all allocating randomly sized "large" Strings between 4,000
and 40,000 bytes in size.  This simulates Rails views with ERB creating large chunks of HTML
to output to the browser. Some of these strings are kept around and some are discarded.

jvns

#!/usr/bin/python
# to try this you'll need to edit in the name of your ruby binary and install bcc-tools
# bcc installation instructions are at https://github.com/iovisor/bcc/blob/master/INSTALL.md

from __future__ import print_function
from bcc import BPF
from time import sleep
import os

# load BPF program