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diff --git a/doc/talks/go_talk-20100121.html b/doc/talks/go_talk-20100121.html deleted file mode 100644 index d5e4bc66f..000000000 --- a/doc/talks/go_talk-20100121.html +++ /dev/null @@ -1,453 +0,0 @@ -<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" - "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> -<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> -<head> -<title>Go, Networked (January 21, 2010)</title> -<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> -<meta name="font-size-adjustment" content="-1" /> -<link rel="stylesheet" href="slidy.css" - type="text/css" media="screen, projection, print" /> -<script src="slidy.js" type="text/javascript"> -</script> -</head> -<body> -<!-- this defines the slide background --> - -<div class="background"> - - <div class="header"> - <!-- sized and colored via CSS --> - </div> - - <div class="footer"></div> - </div> - -<div class="slide titlepage"> -<div style="height: 135px; width: 480px; overflow: hidden; position: fixed; top: auto; bottom: 10px; left: auto; right: 0; "> -<img src="../gordon/bumper480x270.png" style="margin: -135px 0 0 0;"/> -</div> -<!-- <img src="../google.png" style="position: fixed; top: auto; bottom: 30px; left: 20px; right: auto;"/> --> -<br/> -<img src="../go-logo-white.png"> -<br/> -<br/> -<h1 style="padding-right: 0pt; margin-right: 0pt; color: #0066cc; font-size: 250%; border-bottom: 0px;">The Go Programming Language</h1> -<div style="color: #ffcc00;"> -<h2>Russ Cox</h2> -<!-- <h3><i>rsc@google.com</i></h3> --> -<br/> -<h3>CNS Winter Research Review<br/><br/>January 21, 2010</h3> -<br/> -<br/> -<!-- -<h4><i>click to start; then left/right arrow to change slides</i></h4> --> -</div> -</div> - -<div class="slide"> - <h1>Go</h1> - - <h2>New</h2> - <h2>Experimental</h2> - <h2>Concurrent</h2> - <h2>Garbage-collected</h2> - <h2>Systems</h2> - <h2>Language</h2> -</div> - -<div class="slide"> - <h1>Hello, world</h1> -<pre> -package main - -import "fmt" - -func main() { - fmt.Printf("Hello, 世界\n") -} -</pre> -</div> - -<div class="slide"> - <h1>History</h1> - - <h2>Design started in late 2007.</h2> - <h2>Implementation starting to work mid-2008.</h2> - <h2>Released as an open source project in November 2009.</h2> - <h2>Work continues.<h2> - <h2>Robert Griesemer, Ken Thompson, Rob Pike, Ian Lance Taylor, Russ Cox, many others</h2> -</div> - -<div class="slide"> - <h1>Goals and Motivation</h1> - - <h2>Go fast!</h2> - <h2>Make programming fun again.</h2> - <h2>Targeted at systems software, broadly.</h2> -</div> - -<div class="slide"> - <h1>Why isn't programming fun?</h1> - - <div class="incremental"> - <h2>Compiled, statically-typed languages (C, C++, Java) require too much typing and too much typing:</h2> - - <ul> - <li>verbose, lots of repetition</li> - <li>too much focus on type hierarchy</li> - <li>types get in the way as much as they help</li> - <li>compiles take far too long</li> - </ul> - </div> - - <div class="incremental"> - <h2>Dynamic languages (Python, JavaScript) fix these problems (no more types, no more compiler) but introduce others:</h2> - - <ul> - <li>errors at run time that should be caught statically</li> - <li>no compilation means slow code</li> - </ul> - </div> - - <h2 class="incremental">Can we combine the best of both?</h2> -</div> - -<div class="slide"> - <h1>Why a new language?</h1> - - <div class="incremental"> - <h2>No new systems language in 10+ years.</h2> - <h2>Current languages designed before ...</h2> - <h3>... rise of large-scale, networked and multicore computing</h3> - <h3>... rise of Internet-scale distributed development (many libraries)</h3> - </div> -</div> - -<div class="slide"> - <h1>Go</h1> - - <h2>Make the language fast.</h2> - <h2>Make the tools fast.</h2> -</div> - -<div class="slide"> - <h1>Compilation Demo</h1> - - <h2>Build all standard Go packages: ~120,000 lines of code.</h2> -</div> - -<div class="slide"> - <h1>Go in one slide</h1> - - <h2 class="incremental">Lightweight syntax.</h2> - - <h2 class="incremental">Static types: enough to compile well, but inferred much of the time.</h2> - - <h2 class="incremental">Methods: on any type, orthogonal to type system.</h2> - - <h2 class="incremental">Abstract types: interface values, relations inferred statically.</h2> - - <h2 class="incremental">Visibility: inferred from case of name.</h2> - - <h2 class="incremental">First-class functions.</h2> - - <h2 class="incremental">Garbage collection.</h2> - - <br/> - - <h2 class="incremental">Lightweight feel of a scripting language but compiled.</h2> -</div> - -<div class="slide"> - <h1>Go, concurrently</h1> - - <h2>Cheap to create a new flow of control (goroutine):</h2> - -<pre> -func main() { - go expensiveComputation(x, y, z) - anotherExpensiveComputation(a, b, c) -} -</pre> - - <h2>Two expensive computations in parallel.</h2> -</div> - -<div class="slide"> - <h1>Go, concurrently</h1> - - <h2>Cheap to create a new flow of control (goroutine):</h2> - -<pre> - for { - rw := l.Accept() - conn := newConn(rw, handler) - go conn.serve() - } -</pre> - - <h2>Concurrent web server.</h2> - <h2>Network connections multiplexed onto epoll.</h2> - <ul> - <li>many blocked Read calls != many blocked OS threads</li> - </ul> - -</div> - -<div class="slide"> - <h1>Go, synchronized</h1> - - <h2>Use explicit messages to communicate and synchronize.</h2> - -<pre> -func computeAndSend(ch chan int, x, y, z int) { - ch <- expensiveComputation(x, y, z) -} - -func main() { - ch := make(chan int) - go computeAndSend(ch, x, y, z) - v2 := anotherExpensiveComputation(a, b, c) - v1 := <-ch - fmt.Println(v1, v2) -} -</pre> - <h2>Notice communication of result in addition to synchronization.</h2> -</div> - -<div class="slide"> - <h1>Go, synchronized</h1> - - <h2>RPC client</h2> - -<pre> -func (client *Client) Call(method string, args, reply interface{}) os.Error { - // Send RPC message. - call := client.Go(method, args, reply, nil) - - // Read reply from Done channel. - <-call.Done - - return call.Error -} -</pre> -</div> - -<div class="slide"> - <h1>Go, synchronized</h1> - - <h2>RPC client demux</h2> - -<pre> -func (client *Client) input() { - for { - resp := client.readResponse() - client.mutex.Lock() - c := client.pending[resp.Seq] - client.pending[resp.Seq] = c, false - client.mutex.Unlock() - if resp.Error != "" { - c.Error = os.ErrorString(resp.error) - } - resp.Decode(c.Reply) - c.Done <- c - } -} -</pre> -</div> - -<div class="slide"> - <h1>Go, synchronized</h1> - - <h2>RPC client demux</h2> - -<pre> -func (client *Client) input() { - for { - <font style="color: black;">resp := client.readResponse()</font> - client.mutex.Lock() - c := client.pending[resp.Seq] - client.pending[resp.Seq] = c, false - client.mutex.Unlock() - if resp.Error != "" { - c.Error = os.ErrorString(resp.error) - } - resp.Decode(c.Reply) - c.Done <- c - } -} -</pre> -<h2>Read response from network.</h2 -</div> - -<div class="slide"> - <h1>Go, synchronized</h1> - - <h2>RPC client demux</h2> - -<pre> -func (client *Client) input() { - for { - resp := client.readResponse() - <font style="color: black;">client.mutex.Lock() - c := client.pending[resp.Seq] - client.pending[resp.Seq] = c, false - client.mutex.Unlock()</font> - if resp.Error != "" { - c.Error = os.ErrorString(resp.error) - } - resp.Decode(c.Reply) - c.Done <- c - } -} -</pre> -<h2>Look up request by sequence number.</h2 -</div> - -<div class="slide"> - <h1>Go, synchronized</h1> - - <h2>RPC client demux</h2> - -<pre> -func (client *Client) input() { - for { - resp := client.readResponse() - client.mutex.Lock() - c := client.pending[resp.Seq] - client.pending[resp.Seq] = c, false - client.mutex.Unlock() - <font style="color: black;">if resp.Error != "" { - c.Error = os.ErrorString(resp.error) - } - resp.Decode(c.Reply)</font> - c.Done <- c - } -} -</pre> -<h2>Decode response fields from payload.</h2 -</div> - -<div class="slide"> - <h1>Go, synchronized</h1> - - <h2>RPC client demux</h2> - -<pre> -func (client *Client) input() { - for { - resp := client.readResponse() - client.mutex.Lock() - c := client.pending[resp.Seq] - client.pending[resp.Seq] = c, false - client.mutex.Unlock() - if resp.Error != "" { - c.Error = os.ErrorString(resp.error) - } - resp.Decode(c.Reply) - <font style="color: black;">c.Done <- c</font> - } -} -</pre> -<h2>Tell client that it finished.</h2 -</div> - -<div class="slide"> - <h1>Go, synchronized</h1> - - <h2>RPC client demux</h2> - -<pre> -func (client *Client) input() { - for { - resp := client.readResponse() - client.mutex.Lock() - c := client.pending[resp.Seq] - client.pending[resp.Seq] = c, false - client.mutex.Unlock() - if resp.Error != "" { - c.Error = os.ErrorString(resp.error) - } - resp.Decode(c.Reply) - c.Done <- c - } -} -</pre> - -<h2>Can create multiple Calls with same Done channel -and distinguish which finished by inspecting value sent on channel. -</h2> - -</div> - -<div class="slide"> - <h1>Goroutine demo</h1> - - <h2>Chain together 100,000 goroutines connected by 100,001 channels.</h2> - - <h2>Send a value to one end of the chain.</h2> - - <h2>Each passes it along, increments.</h2> - - <h2>Receive value out the other end of the chain.</h2> -</div> - - -<div class="slide"> - <h1>Go Status</h1> -</div> - -<div class="slide"> - <h1>Go Status</h1> - - <h2>Open source:</h2> - <ul> - <li>released on November 10, 2009 - <li>regular releases (~ weekly) - <li>all development done in public Mercurial repository - <li>outside contributions welcome - <li>two independent compiler implementations - <li>XML, JSON, HTTP, TLS/SSL, native RPC, (network channels,) ... - </ul> -</div> - -<div class="slide"> - <h1>Go Status</h1> - - <h2>Open source</h2> - - <h2>Portable:</h2> - <ul> - <li>FreeBSD, Linux, OS X (x86, x86-64) - <li>(in progress) Linux arm, Native Client x86, Windows x86. - </ul> -</div> - -<div class="slide"> - <h1>Go Status</h1> - - <h2>Open source</h2> - <h2>Portable</h2> - - <h2>Still in progress, experimental. Yet to come:</h2> - <ul> - <li>production garbage collector - <li>generics? - <li>exceptions? - <li>unions or sum types? - </ul> -</div> - -<div class="slide titlepage"> - <h1>Questions?</h1> - <br><br> - <center> - <img src="../gordon/bumper640x360.png"> - </center> - <br><br> - <div style="color: #ffcc00;"> - <!-- <h3><i>rsc@google.com</i></h3> --> - </div> -</div> - -</body></html> |