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  • Android 平台
    • Game On! 游戏开发系列 - 031
      • Pie Noon - 1503060393
      • The Death of Base Game Activity - 1504030543
      • Surviving OpenGL Context Loss - 1504030546
      • WebP for Game Devs - 1504030547
      • Saved Games In-Depth (Part 1) - 1504070556
      • Saved Games In-Depth (Part 2) - 1504030548
      • Smaller Flipbook Textures with CRABBY - 1504030544
      • Google Tag Manager - 1504030545
      • Flatbuffers - 1505050794
      • Achievement Point Pointers - 1505050796
      • Frequency Scaling - 1505050797
      • Meet the Management APIs - 1501140367
      • Y U Ship Broken Games - 1505050795
    • Android 性能优化 - 088
      • Garbage Collection in Android - 1503170425
      • Performance Cost of Memory Leaks - 1503170424
      • Rendering Performance 101 - 1501130351
      • Understanding Overdraw - 1501130352
      • Understanding VSYNC - 1501130353
      • Tool - Profile GPU Rendering - 1501130354
      • Why 60fps? - 1501130355
      • Android UI and the GPU - 1501130356
      • Invalidations, Layouts, and Performance - 1501130357
      • Overdraw, Cliprect, QuickReject - 1501130358
      • Tool - Memory Monitor - 1501130363
      • Battery Performance 101 - 1501130364
      • Understanding Battery Drain on Android - 1501130365
      • Battery Drain and WakeLocks - 1501130366
      • Memory Performance 101 - 1504170661
    • I/O 2014 Android 开发专题 - 089
      • Activity Transitions - 1504020505
      • Building Apps For Android TV - 1504020520
      • Building great Android media experiences - 1504020510
      • Building a quality app from start to finish - 1504020515
      • App Indexing API - 1504020507
      • What's new in WebView - 1504010484
      • Bluetooth Low Energy - 1504010486
      • Building impressive Android media experiences - 1504010493
      • The next Generation of Authentication - 1504020497
      • Don't Alpha That Pixel! - 1504020523
      • NFC + HCE Your phone in an interactive world - 1504020509
      • Demystifying encodes and decodes of WebM - 1504020521
      • Google Cloud Messaging - 1504020524
      • Getting your Game on the Big Screen - 1504020518
      • I hear you like realtime memes - 1504020511
      • Offerize your App - 1504020506
      • Using the Android Job Scheduler - 1504020504
      • From Holo to Material - 1504020526
      • Under the Hood of Android Auto - 1504020501
      • Isolation for Android App Developers - 1504020498
      • Android Work - 1504010496
      • ExoPlayer: Adaptive video streaming on Android - 1504010489
      • Sample rates and resampling: Why can't we all just agree? - 1504010488
      • Drive Android API - 1504010485
    • Android Studio - 004
      • Layout Editor (Ep 3, Android Studio) - 1503290479
      • Introducing Gradle (Ep 2, Android Studio) - 1503170426
    • I/O 2014 Android 分发主题 - 091
      • Introduction to Google Play - 1504030534
      • Google Play: building your user community - 1504030535
      • Optimizing Apps for Education - 1504030536
      • Succeeding in Education Technology - 1504030530
      • Subscriptions Made Easy with Google Play - 1504030531
      • The world is your playground - go global with Google - 1504030533
      • Maximizing discoverability on Google Play - 1504030538
    • Android Auto - 003
      • Introduction to Android Auto - 1504130615
      • Android Auto Messaging - 1504130617
      • Android Auto Audio - 1504130616
    • Android Wear - 006
      • Designing for Android Wear - 1503210448
      • How We Customized Google Apps for Android Wear - 1503210450
      • Fullscreen apps for Android Wear - 1503210445
      • New Notification Features for Android Wear - 1503210446
      • Building Cloud-powered wearable Apps - 1503210449
      • An Introduction to Android Wear - 1503190435
      • Google I/O 2014 - Android Wear: The developer's perspective - 1503210442
      • Devoxx 2014 Interviews: Android Wear - 1503210440
      • DevBytes: Watch Faces for Android Wear - 1503210439
    • Android TV - 005
      • Using the Leanback library - 1504080588
      • Beach Buggy Racing Multiplayer with Nearby Connections (Play Services) - 1503060387
    • Android for Work - 106
      • Android for Work for Developers - 1503060390
      • App Configurations, Testing and Launchers - 1504110590
    • IO Bytes 2014 - Android - 066
      • Chrome Apps on Android and iOS - 1501080014
      • Perf Primer CPU, GPU and your Android game - 1501080017
  • Chrome 平台
    • IO Bytes 2014 - Chrome and Web - 067
      • Using the PageSpeed API - 1505070815
      • Fabulous Forms for the multi-device web - 1505070816
      • Testing multi-screen web pages - 1505070817
      • Responsive images today - 1505070819
      • Web Performance Testing at YouTube - 1505070828
      • Building sites for the multi-device web - 1505070820
      • Deep dive: Google Cloud Messaging for Chrome - 1505070827
  • Google 创业者资源
    • Coffee with a Googler - 012
      • Chat with Allen Huang of AndroidTV - 1503040384
      • Chat with Fred Chung about developer advocacy - 1503070395
      • Google Fit platform with Michelle Haq - 1503210443
      • Android Auto Product Manager Andrew Brenner - 1501120027
      • Chat with Francis Ma about Google Play services - 1501120028
    • Root Access For Startups - 077
      • What we learned building plug-ins for Android, with startup Magnet - 1503230453
      • How to use crowdfunding to your advantage, with startup Hale Devices - 1503280462
      • How to overcome customer objections when selling tech, with startup Guesswork - 1503280458
    • First Things First - 029
      • Getting started with Android: A crash-course in developing for Android - 1504120601
      • How to ask a question: conducting research for your startup - 1504120603
      • MVP Design Hacks: transform your hot idea into a validated prototype - 1504120602
      • Build something people want: Solving real problems - 1504120605
    • How I - 061
      • Use BigQuery to find my most valuable customers - 1504070573
      • Manage beta testing communities using Google Play - 1504070572
      • Use paper wireframing to build native prototypes - 1504070570
      • Used social media and $0 marketing to get 68 million users - 1504070568
      • Prep to fundraise with four questions - 1504070564
      • Validated my idea in 2 days (with no code) - 1504070562
      • Build open platforms on Android - 1504120596
      • Get cheap, automatic analytics for my business using BigQuery - 1504070571
      • Write press releases to get international media coverage - 1504070569
      • Test beta-product features using Google Apps - 1504070563
      • Use URL builder to measure ROI on social media - 1504070561
      • Use events to build DeadSocial's brand - 1504070557
      • Use BigQuery to visualize streaming data - 1503220452
      • Find, screen, and hire developers - 1503120406
      • Drive engagement with social challenges - 1504070558
  • 设计
    • DesignBytes - 017
      • Paper and Ink: The Materials that Matter - 1505050793
  • 云计算
    • DevBytes: Google Cloud Platform - 021
      • Powering the next killer app with the Google Cloud Platform - 1504210672
      • Introduction to Google Cloud Endpoints - 1504210675
      • The Beauty of Scale with Google Cloud Platform - 1504210678
    • Google Cloud Platform - Big Data - 105
      • GDELT & BigQuery: Understand the world - 1502200379
    • Uncategorized - 999
      • Introducing Google Cloud Platform Resources - 1501190370
  • Google 应用开发
    • Launchpad Online - 072
      • The Setup: Creating new apps using Google APIs - 1503190428
      • Listing your files in Google Drive - 1503190429
      • Customizing Google Analytics for your startup - 1503290473
      • The Launchpad Online series - 1503190427
      • Getting started with Google Analytics - 1503290472
      • Accessing Google Maps from a spreadsheet?!? - 1502220381
      • Change the world in 10 lines of code - 1503080398
    • Google Play Services - 054
      • Google Play services 6.1 - 1503290481
      • Google Play Services 7.0 - 1503200437
      • Google Play Services 6.5 - 1501080015
    • 谷歌地图 iOS SDK - 053
      • Maps Live: New Features in the Google Maps Mobile APIs for Android and iOS - 1504300777
    • Google 移动搜索开发 - 055
      • Is your app in the Google index? - 1504120598
      • Get more engaged users with Google Search for Developers - 1503070397
    • DevBytes: Google Cast - 020
      • Google Cast SDK for Android - 1504180666
      • Media Router Framework - Part 1 - Media Router API - 1504180667
      • Overview for Google Cast Receivers - 1504180664
      • Google Cast SDK for iOS - 1504180663
    • Getting Started with the Google Maps SDK for iOS - 035
      • Getting started with the Google Maps SDK for iOS, Part 1 - 1504270757
    • IO Bytes 2014 - Wearables - 070
      • Voice Driven GDK Glassware - 1505280836
    • Route 85 - 078
      • Introducing Route 85 - 1501120022
      • Quick Tip: Don't Default that Switch! - 1501190371
      • OpenInChrome on iOS, Part 1 - 1501120023
      • OpenInChrome on iOS, Part 2 - 1501120024
      • OpenInChrome on iOS, Part 3 - 1501120025
      • OpenInChrome on iOS, Part 4 - 1501120026
    • DevBytes 2014 - 019
      • Web Components - Template - 1505040789
      • Wearable DataLayer API - 1505050792
      • Using srcset for responsive images - 1505050790
      • The picture element for art direction - 1505050791
    • Uncategorized - 999
      • Sun Surveyor brings augmented reality to photographers using Google Maps APIs - 1504200668
      • Snappy travels with the Roads API - 1503060392
      • Easy Maps Apps in Java and Python - 1501140030
  • Google 广告平台
  • Polymer
    • Polycasts - 076
      • The Awesome Power of Auto-Binding Templates -- Polycasts #08 - 1502220382
      • Content Switcheroo with Core-Pages -- Polycasts #09 - 1502200380
      • Core Iconset -- Polycasts #02 - 1505040788
  • Web 平台
    • HTTP 203 - 062
      • Gotchas - 1501140368
      • Font Rendering - 1501080016
    • Web Components - 081
      • DevBytes: Web Components - Overview - 1504250709
  • 宣传视频
    • Uncategorized - 999
      • Google Developers - 1501150369
      • I/O Extended 2014 - Join me - 1502220383
  • Google 各类开发者会议
    • 2014 Chrome 开发者高峰会议 - 009
      • Keynote - Chrome Dev Summit 2014 (Darin Fisher) - 1503120407
      • TLS All the Things! - Security with Performance(Chris Palmer) - 1503140412
      • Let’s build some apps with Polymer!(Rob Dodson) - 1503150415
      • Day One Closing Remarks(Sundar Pichai) - 1503150417
      • Chrome Leadership panel - 1503160422
      • Fundamentals of Mobile Web Development(Matt Gaunt) - 1503150416
    • 2015 游戏开发者大会中 - 039
      • FlatBuffers - 1504150640
      • Games for Google Cast - 1504150637
      • Top 10 Things Android Game Developers Should Know v 3.0 - 1504150643
      • Automate Publishing for Google Play APIs - 1504150639
      • 3 Game Design Mistakes You're Making - 1504150636
      • Android TV - 1504150638
      • How to Go Viral Without Really Trying - 1504150641
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      • What's new in Android 5.0 Lollipop - 1504260740
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      • Playtime Shanghai event sizzle reel - 1504070552
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      • The Trailer, Season 2 - 1503060385
      • Behind the Scenes - 1503210441
      • Arithmetic Compression (Ep 5, Compressor Head) Google - 1503070394
      • Introducing Compressor Head - 1502120372
      • Episode 1 (Variable Length Codes) - 1502120373
      • Episode 2 (The LZ77 Compression Family) - 1502120374
      • Episode 3 (Markov Chain Compression) - 1502120375
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  1. Google 各类开发者会议
  2. 2015 游戏开发者大会中 - 039

FlatBuffers - 1504150640

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视频发布时间

2015年3月12日

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暂无，待补充。

译者信息

翻译

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1504150640

解说词中文版：

大家好

我是Wouter van Oortmerssen

是谷歌Fun Propulsion Labs团队的一员

我们的工作是制作各类库和工具

帮助安卓或其他平台的开发者优化他们的游戏开发等

其中一个是FlatBuffers

FlatBuffers是一个工具库

它可以让你的游戏载入更快并且使用更少的内存

想想 你的游戏需要多少时间

载入数据呢

载入数据需要很多时间 因为通常游戏

数据储存在不同的硬盘 而不是在内存中

相对来说这会节省很多空间

而且它可以被储存为文本格式以便人们进行编辑

这两种模式之间的转化就是

我们所说的序列化

现在序列化变得很棒 因为数据和内存可以专注于

他们各自的特长 这意味着缓冲更快更容易

同时数据在硬盘上

也各有优点 易于压缩

独立于计算机 可以发送 向后兼容

但是序列化也有其弊端 因为所有的压缩

及解压都要花时间

这需要辅助存储器 因为我们

需要把这些序列化的数据解压到对象中

这就使得格式化变得易错

所以如你所知 在个别游戏中 需要很多内存

我们有办法修复这个问题吗

好吧 这些问题都来源于我们假设

内存和硬盘特性是天生相互矛盾

在储存数据时

但是如果我们换别的方法呢

现在 你就需要FlatBuffers

FlatBuffers实际是一个可移动的赋值格式

它可以让你在硬盘上储存数据的同时

在内存上储存同样的数据 这也就意味着

你不需要转换就可以将其中一个移动到另一个

这个在硬盘上工作的很好 因为它对一下几方面有固定的规则

比如硬盘格式 校准 和一个附加的平台

这解决了向前 向后兼容性的问题

你可以很容易的添加 移动文件

它在内存上也工作的很好

通过offset我们可以完成任何事 所以它的效率超级高

有一点很棒的就是它工作时有只读权限

并且只需要很小的的缓冲区

相对于独立分配到对象中来说

在这方面 我可以说出很多理由

让你只想用FlatBuffers

所以你该怎么做呢

首先 你要写一个schema

然后将你的schema放入schema编译器中

我们将会以你最喜欢语言生成的代码

假设你最喜欢的语言是这四种中的一种

将生成的代码加载到你的游戏中

读取 写入FlatBuffer数据

schema文件最重要一点的就是高效

没有错误检查之前你也可以访问你的数据

你可以在不重生成你所有数据的情况下修改schemas文件

举个例子 你要升级你的游戏

但你又需要以前储存的游戏都还在运行

你该怎么停止FlatBuffer

人们通常都会怀疑该怎么做

为了向前 向后的兼容性

我们有个可以添加或者移除文件的表格

这个间接的方式称为虚拟表格

此外我们还有structs

如果你希望效率最大化

不要支持格式化操作

当然 这是最快的储存数据方式

最后 我们有enums unions 及一些其他很酷的东西

让我们来看看听到的这些该怎么实现

这是一个内存中对象

它以一个虚拟表格中的offset开始

它是含有实际的文件的offset

现在 这些虚拟表格在相似的对象之间共享

所以实际上他们并不会占用很多空间

接下来就是实际的文件

依次进入 包括 structs等

如果你需要引入一个大数据文件

这需要通过一个间接的offset

我们来看看在c++代码中你该怎么用这个

首先你要定位到你的根对象

然后用文件存储器真实的看看这个些数据

这为你隐藏了所有的offset检查

所以很方便

用FlatBuffer建一个组分帮助者分类

之后你调用这个建立函数时

它将会在缓冲区为你建立对象

我知道这听起来不可能很快 但它究竟有多快呢

我们来将它和其他主流的序列化对比一下

结果

当然 你需要一个参照标准

我相信你最终会发现一些有趣的事

所以如果你打算测试FlatBuffer

你会发现他快1000倍

相比其他结果来说

这是因为我们实际上没有进行解析

或者分配任何事

写一个FlatBuffer也会快100倍

这也是很好的

实际上我们没有分配任何对象

这样我们读取数据时就会很方便

最好 代码也很少

这些是为了产生代码和程序库代码

你也许会说你不关心这些

我仍然打算用文本 因为我认为这很容易做到

你知道吗

FlatBuffers也支持JSON格式输出

这意味这你可以转换到二进制格式

包括飞行在内的所以游戏中的过程

都在我们命令行中

以上就是我介绍的所以内容

在GDC可以联系我们或者我

谢谢

背景音乐

Watch the complete GDC '15 playlist at: is cool! And serialization sucks. How can you seralize the massive amounts of data that ships with your game without killing your performance or memory? We don't want to give away the answer, but it's kinda in the title...

http://goo.gl/whR0PLSerialization
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