Valentin Syrovatskiy vsyrovat

## libuv-vs-libev.md

      
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                vsyrovat
                / libuv-vs-libev.md
            
            
              Created
              August 7, 2021 16:30
                — forked from andreybolonin/libuv-vs-libev.md
            
          
    Libuv and libev, two I/O libraries with similar names, recently had the privilege to use both libraries to write something. Now let's talk about my own subjective expression of common and different points.
The topic of high-performance network programming has been discussed. Asynchronous, asynchronous, or asynchronous. Whether it is epoll or kqueue, it is always indispensable to the asynchronous topic.
Libuv is asynchronous, and libev is synchronous multiplexing IO multiplexing.
Libev is a simple encapsulation of system I/O reuse. Basically, it solves the problem of different APIs between epoll and kqueuq. Ensure that programs written using livev's API can run on most *nix platforms. However, the disadvantages of libev are also obvious. Because it basically just encapsulates the Event Library, it is inconvenient to use. For example, accept(3) requires manual setnonblocking after connection. EAGAIN, EWOULDBLOCK, and EINTER need to be detected when reading from a socket. This is a

  
## .bashrc-phpbrew-cd-hook
# Based on https://gist.github.com/laggardkernel/6cb4e1664574212b125fbfd115fe90a4

# create a PROPMT_COMMAND equivalent to store chpwd functions
typeset -g CHPWD_COMMAND=""

_chpwd_hook() {
  shopt -s nullglob

  local f

## install-php7.sh
#!/usr/bin/env bash

set -eo pipefail

#CC=/usr/bin/gcc-8
# CFLAGS="-O3 -pipe -march=native -mtune=generic"
echo "CC=\"$CC\""
echo "CFLAGS=\"$CFLAGS\""
echo "CXXFLAGS=\"$CXXFLAGS\""
echo "MAKEFLAGS=\"$MAKEFLAGS\""

## git-add-pre-commit-hook.sh
#!/usr/bin/env bash

PRE_COMMIT_HOOK_FILE=".git/hooks/pre-commit"

if [[ -f $PRE_COMMIT_HOOK_FILE ]]; then
  echo "File .git/hooks/pre-commit already exists"
  ls -lsah $PRE_COMMIT_HOOK_FILE
  cat $PRE_COMMIT_HOOK_FILE
  exit 1
else

## fstab example
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/vda2       /               ext4    errors=remount-ro 0       1
# Swap file (manually added)
/swapfile       none            swap    sw                0       0

## gist:d54b63980c966f0bfe89b67e212886d3
rails new demo && cd demo

rails g scaffold parent name:string age:integer

rails g scaffold toy parent_id:integer

""" прописываем belongs_to и has_many в моделях """

rake db:migrate

## base.tpl
<html>
  <head>
    <title>{$title}</title>
  </head>
  <body>
    {% block body %}{% endblock %}
    <div class="footer">
      <p class="copyrights">&copy; Ololo team</p>
      <p class="contacts">Call us: +1 123 456 789</p>
    </div>

## base.haml
html
  head
    title
      = yield(:title)
  body
    = block body
    .footer
      p.copyrignts '&copy; Ololo team'
      p.contacts 'Call us: +1 123 456 789'

## index.haml
html
  head
    title
      = yield(:title)
  body
    p 'Some intro text for index page'
    .main
      = yield
    .footer
      p.copyrignts '&copy; Ololo team'
	# Based on https://gist.github.com/laggardkernel/6cb4e1664574212b125fbfd115fe90a4

	# create a PROPMT_COMMAND equivalent to store chpwd functions
	typeset -g CHPWD_COMMAND=""

	_chpwd_hook() {
	shopt -s nullglob

	local f
	#!/usr/bin/env bash

	set -eo pipefail

	#CC=/usr/bin/gcc-8
	# CFLAGS="-O3 -pipe -march=native -mtune=generic"
	echo "CC=\"$CC\""
	echo "CFLAGS=\"$CFLAGS\""
	echo "CXXFLAGS=\"$CXXFLAGS\""
	echo "MAKEFLAGS=\"$MAKEFLAGS\""
	#!/usr/bin/env bash

	PRE_COMMIT_HOOK_FILE=".git/hooks/pre-commit"

	if [[ -f $PRE_COMMIT_HOOK_FILE ]]; then
	echo "File .git/hooks/pre-commit already exists"
	ls -lsah $PRE_COMMIT_HOOK_FILE
	cat $PRE_COMMIT_HOOK_FILE
	exit 1
	else
	# /etc/fstab: static file system information.
	#
	# Use 'blkid' to print the universally unique identifier for a
	# device; this may be used with UUID= as a more robust way to name devices
	# that works even if disks are added and removed. See fstab(5).
	#
	# <file system> <mount point> <type> <options> <dump> <pass>
	/dev/vda2 / ext4 errors=remount-ro 0 1
	# Swap file (manually added)
	/swapfile none swap sw 0 0
	rails new demo && cd demo

	rails g scaffold parent name:string age:integer

	rails g scaffold toy parent_id:integer

	""" прописываем belongs_to и has_many в моделях """

	rake db:migrate
	<html>
	<head>
	<title>{$title}</title>
	</head>
	<body>
	{% block body %}{% endblock %}
	<div class="footer">
	<p class="copyrights">© Ololo team</p>
	<p class="contacts">Call us: +1 123 456 789</p>
	</div>
	html
	head
	title
	= yield(:title)
	body
	= block body
	.footer
	p.copyrignts '© Ololo team'
	p.contacts 'Call us: +1 123 456 789'