Web framework tornado.web — RequestHandler and Application classes tornado.template — Flexible output generation tornado.routing — Basic routing implementation tornado.escape — Escaping and string manipulation decorated coroutines How it works How to call a coroutine Coroutine patterns Calling blocking functions Parallelism Interleaving Looping Running in the background Queue example - a concurrent web spider why CPU blocking must be taken as seriously as other kinds of blocking, consider password hashing functions like bcrypt [http://bcrypt.sourceforge.net/], which by design use hundreds of milliseconds of CPU

why CPU blocking must be taken as seriously as other kinds of blocking, consider password hashing functions like bcrypt, which by design use hundreds of milliseconds of CPU time, far more than a typical network background before triggering some future action in the application (as opposed to normal synchronous functions, which do every- thing they are going to do before returning). There are many styles of asynchronous Callback registry (e.g. POSIX signals) Regardless of which type of interface is used, asynchronous functions by definition interact differently with their callers; there is no free way to make a synchronous

让我们一起动手完成一个项目来快速上手 Rust！本章将介绍一些 Rust 中常见的概念，并通过 真实的程序来展示如何运用它们。你将会学到 let、match、方法（methods）、关联函数 （associated functions）、外部 crate 等知识！后续章节会深入探讨这些概念的细节。在这一 章，我们将主要练习基础内容。 我们会实现一个经典的新手编程问题：猜数字游戏。游戏的规则如下：程序将会生成一个 1 到 100 时出现在调用之处可见的作用域内就行。 让我们新建一个叫做 functions 的二进制项目来进一步探索函数。将上面的 another_function 例子写入 src/main.rs 中并运行。你应该会看到如下输出： $ cargo run Compiling functions v0.1.0 (file:///projects/functions) Finished `dev` profile profile [unoptimized + debuginfo] target(s) in 0.28s Running `target/debug/functions` Hello, world! Another function. main 函数中的代码会按顺序执行。首先，打印 “Hello, world!” 信息，然后调用 another_function 函数并打印它的信息。 参数