software libraries and numbers
DESCRIPTION
Software Libraries and Numbers. Some overall numbers from common package managers like Maven2, NPM, RubyGems, Packagist, PIP.TRANSCRIPT
SOFTWARE LIBRARIES AND NUMBERS
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ROBERT REIZhttp://www.versioneye.com/https://twitter.com/robertreiz
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WHAT IS A SOFTWARE LIBRARY?
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RE-USABLE PEACE OF SOFTWARE WITH AN
APPLICATION PROGRAMMING INTERFACE
(API)
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SOFTWARE LIBRARIESBUNDLED AS ...
• JAR file (Java)
•GEM file (Ruby)
•DLL file (.NET)
• tar.gz file (Python PIP)
bundle, share and re-useWednesday, December 5, 12
HOW TO GET IT?
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OLD SCHOOL!
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USE PACKAGE-MANAGERS!
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PACKAGE-MANAGERSLIKE ...
•Maven (http://search.maven.org) - Java
•RubyGems (http://rubygems.org) - Ruby
• PIP (http://pypi.python.org) - Python
•Composer (http://packagist.org) - PHP
•NPM (https://npmjs.org/) - Node.JS
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WHY TO USEPACKAGE-MANAGERS?
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BECAUSE OF DEPENDENCIES!
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A SOFTWARE LIBRARY CAN USE OTHER
SOFTWARE LIBRARIES!
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A DEPENDS ON BB DEPENDS ON CB DEPENDS ON DD DEPENDS ON X
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A DEPENDS ON BB DEPENDS ON CB DEPENDS ON DD DEPENDS ON X
IF YOU WANT TO USE A YOU NEED A, B, C, D AND X
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PACKAGE-MANAGERS ARE RESOLVING RECURSIVE
DEPENDENCIES
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WWW.VERSIONEYE.COMMETA SEARCH ENGINE
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META INFORMATIONS FROM ALL PACKAGE-MANAGERS IN ONE
SINGLE DATABASE.
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VERSION EYE MAKES DEPENDENCIES AND
COMPLEXITY VISIBLE
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http://www.versioneye.com/package/rails
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WHICH SOFTWARE LIBRARY IS MORE COMPLEX?
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SOME NUMBERS
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HOW DO YOU KNOW THAT A PROJECT IS STILL ALIVE?
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HOW MANY SOFTWARE ARTIFACTS PER LANGUAGE?
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Java
Ruby
Python
Node.JS
PHP
0 125000 250000 375000 500000
Java 473413Ruby 456282Python 275904Node.JS 128647PHP 38901
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HOW MANY LIBRARY PROJECTS PER LANGUAGE?
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https://www.versioneye.com/statistics/
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WHICH REPOSITORY IS GROWING LIKE CRAZY?
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https://www.versioneye.com/statistics/
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18%
82%
Java Open Source Libraries
Central MVN Repo Other Repos
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YOU WANT MORE NUMBERS?
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HOW OFTEN IS A LIBRARY USED?
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85%
15%
Usage of JUnit
Using JUnit Not Using JUnit
99%
1%
Usage of TestNG
Using TestNG Not Using TestNG
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MORE NUMBERS COMING SOON
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MANY THANKS
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DO YOU HAVE QUESTIONS?
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DO YOU HAVE QUESTIONS?
TALK TO MEMY NAME IS ROBERT REIZ
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