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Beyond Java: Go for Java developers

At an event of the Java User Group Switzerland on June 3, 2015 in Zürich Netcetera's CEO Andrej Vckovski presented the modern developing system Go and compared it with Java.

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Beyond Java: Go for Java developers

  1. 1. Beyond Java: Go for Java developers Go or no go Andrej Vckovski <andrej.vckovski@netcetera.com>
  2. 2. Before we start …
  3. 3. Netcetera | 3
  4. 4. Netcetera | 4
  5. 5. Motivaton • About me, us and them • The showcase Go programming • The language • Running go programs • Tool-chain • Ecosystem So What
  6. 6. 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 BASIC/HP Pascal/CP/M For fun or merit BASIC/MS-DOS For money ASM/MS-DOS C/MS-DOS Pascal/MS-DOS Fortran/VMS Clipper/MS-DOS C/C++/Windows C/C++/Unix Tcl/Unix Java/Unix Go/Unix For my father’s engineering office Hannes Keller Computerzentrum Abakus Informatik As Freelancer Netcetera Diploma Thesis @ ETH PhD @ UniZH High School in ZH JDK 1.0 Pre-Beta problems Andrej Vckovski (vckovski@gis.geogr.unizh.ch) Fri, 29 Sep 1995 14:56:34 +0100 (MET) •Messages sorted by: [ date ][ thread ][ subject ][ author ] •Next message: Arthur van Hoff: "Re: more casting (sort of)" •Previous message: Jim Graham: "Re: peer classes?" Hi, I have some problems when running some of the examples of the JDK pre-beta distribution and also own JAVA code. All tools (java, jdb, appletviewer) produce a seg fault with some examples. It seems to me that it is somehow connected to the call of java.net.InetAddress.getByName(InetAddress.java) This happens for example with ImageTest demo and many others. I've seen some msg earlier indicating a wrong version of 'putmsg' in the binaries ?? Is that it? BTW, I'm running Solaris 2.4 on arch sun4c. Here is an example thread dump: SIGSEGV 11* segmentation violation si_signo [11]: SIGSEGV 11* segmentation violation si_errno [0]: Error 0 si_code [1]: SEGV_ACCERR [addr: 0xc] stackbase=EE17B000, stackpointer=EE1777A8 6
  7. 7. Netcetera, May 2015 0 50 100 150 200 250 guru expert medium little 7
  8. 8. Netcetera | 8 By Stickophobe (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons Portions of this page are reproduced from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License. 250+ engineers • Java/J2E • Java/Android • Objective-C/iOS • C#/.NET • JavaScript/any
  9. 9. 10
  10. 10. 11
  11. 11. The application: Very Instant Massive (Audience) Polling  Presentations like this one  TV shows with added interactivity  Pause entertainment in a stadium  Flipped Classrooms © Loozrboy © Chris Lawrence © Jeff Chenqinyi © Nhenze 12
  12. 12. Browser that displays questions and allows voting Presentation Software (e.g., PowerPoint) Browser that displays voting results directpoll server System context Browser that displays questions and allows voting Browser that displays questions and allows voting go JS JS JS JS 13
  13. 13. Browser that displays questions and allows voting Presentation Software (e.g., PowerPoint) Browser that displays voting results ipoll server Browser that displays questions and allows voting Browser that displays questions and allows voting go JS JS JS JS WebSockets  Full-duplex conversation over TCP connection  RFC 6455  Available in most modern browsers  Simple JavaScript binding  Handshake by HTTP, then user-defined messages over the same socket Client (Browser) Server HTTP GET Request, special attributes HTTP response “switch protocol” Message Message Message Message Message 14
  14. 14. Browser that displays questions and allows voting Presentation Software (e.g., PowerPoint) Browser that displays voting results directpoll server Multiplexer and Demultiplexer Browser that displays questions and allows voting Browser that displays questions and allows voting 15
  15. 15. The Language 16
  16. 16. Language itself •Syntax, Concepts, Static and Execution Semantics, Type System •Features Implementation •Runtime •Performance •Deployment Toolchain •What is there to support the development process Ecosystem •People, Organizations, Groove 17
  17. 17. Out of the box tools  go tool – Fetching packages – Building, installing – Instrumenting (race detection – Running tests (also with coverage) – Static code analysis – …  gofmt and goimports  Godoc  cgo for linking with legacy (a.k.a. C-code) darwin dragonfly freebsd linux netbsd openbsd plan9 solaris windows 64-bit x86 32-bit x86 32-bit ARM 19
  18. 18. Runtime  Go is compiled/linked into machine code (also cross-compiling)  Executuable embeds type information for introspection  Executable does not use dynamic/shared libraries (i.e. all static) 20
  19. 19. Performance Pure CFastest •C++ •Rust •Go •Java/Scala Almost as fast •Node.js •Ruby •Python •Tcl •PHP Slower Go executes with similar speed as Java, but uses usually considerably less memory 21
  20. 20. http://benchmarksgame.alioth.debian.org/ 22
  21. 21. http://www.techempower.com/benchmarks 23
  22. 22. Ecosystem  Many web frameworks  Many proposals for language extensions (about 50 proposals for generics ;-))  Not yet established at Universities for teaching  No formal certifications yet  Active community  Many commercial users, mostly for «heavy-duty» Web work 24
  23. 23. SO WHAT? 25
  24. 24. 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 Language Adoption 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 Developers 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 Cumulative LOC Hype LegacyState of the art Maintenance! 26
  25. 25. By Rick Dikeman (Image:Wayne Gretzky 1997.jpg) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons 27
  26. 26. In >> OutIn > Out 28
  27. 27. From time to time, it is good to clean the desk Change to where the future will be Go is sufficiently new, very pragmatic, fast to use, based on experience and not to fancy 29
  28. 28. If you can, go go. 30
  29. 29. Resources Learning http://tour.golang.org http://golang.org/wiki/LearnCommunity Community http://golang.org/project 31

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