Bing Wang pigletfly

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

They are the people who get things done. Effective Engineers produce results.

Adopt the Right Mindsets

Asynchronous programming with Tornado

Asynchronous programming can be tricky for beginners, therefore I think it's useful to iron some basic concepts to avoid common pitfalls.

For an explanation about generic asynchronous programming, I recommend you one of the [many][2] [resources][3] [online][4].

I will focus on solely on asynchronous programming in [Tornado][1]. From Tornado's homepage:

Performance of Flask, Tornado, GEvent, and their combinations

Wensheng Wang, 10/1/11

Source: http://blog.wensheng.org/2011/10/performance-of-flask-tornado-gevent-and.html

When choosing a web framework, I pretty much have eyes set on Tornado. But I heard good things about Flask and Gevent. So I tested the performance of each and combinations of the three. I chose something just a little more advanced than a "Hello World" program to write - one that use templates. Here are the codes:

1, Pure Flask (pure_flask.py)

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Check a Specific Table in a Database

$ mysqlcheck -c database_name table_name -u root -p

	package main

	import (
	"context"
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"

	--type-set=coffee=.coffee
	--type-set=haml=.haml
	--type-set=sass=.sass
	--type-set=minifiedjs=.min.js
	--nocss
	--nominifiedjs

	--ignore-dir=coverage
	--ignore-dir=dragonfly
	--ignore-dir=javascripts/lib

	# Copyright (c) 2010, Philip Plante of EndlessPaths.com
	#
	# Permission is hereby granted, free of charge, to any person obtaining a copy
	# of this software and associated documentation files (the "Software"), to deal
	# in the Software without restriction, including without limitation the rights
	# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	# copies of the Software, and to permit persons to whom the Software is
	# furnished to do so, subject to the following conditions:
	#
	# The above copyright notice and this permission notice shall be included in

	#!/usr/bin/env python
	# -- coding: utf-8 --
	#
	# Copyright 2012 Ethan Zhang<http://github.com/Ethan-Zhang>
	#
	# Licensed under the Apache License, Version 2.0 (the "License"); you may
	# not use this file except in compliance with the License. You may obtain
	# a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0

	import sys
	from gevent import server
	from gevent.baseserver import _tcp_listener
	from gevent import pywsgi
	from gevent.monkey import patch_all; patch_all()
	from multiprocessing import Process, current_process, cpu_count

	def hello_world(env, start_response):
	if env['PATH_INFO'] == '/':
	start_response('200 OK', [('Content-Type', 'text/html')])

	# -- coding: utf-8 --

	# 2.如遇到 UnicodeEncodeError: 'ascii' codec can't encode characters in position 22-25: ordinal not in range(128)
	# 增加如下3行
	import sys
	reload(sys)
	sys.setdefaultencoding('utf-8')

	from pyquery import PyQuery as pq