lean software
TRANSCRIPT
Lean Software Development
Monday, March 25, 13
`whoami`=> Cyril David
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twitter.com/cyxgithub.com/cyx
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engineer at citrusbyte
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Lean
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1. Eliminate Waste2. Amplify Learning3. Decide as late as possible4. Deliver as fast as possible5. Empower the team6. Build integrity in7. See the whole
Monday, March 25, 13
1. Eliminate Waste2. Amplify Learning3. Decide as late as possible4. Deliver as fast as possible5. Empower the team6. Build integrity in7. See the whole
Monday, March 25, 13
1. Eliminate Waste2. Amplify Learning3. Decide as late as possible4. Deliver as fast as possible5. Empower the team6. Build integrity in7. See the whole
Monday, March 25, 13
1. Eliminate Waste2. Amplify Learning3. Decide as late as possible4. Deliver as fast as possible5. Empower the team6. Build integrity in7. See the whole
Monday, March 25, 13
1. Eliminate Waste2. Amplify Learning3. Decide as late as possible4. Deliver as fast as possible5. Empower the team6. Build integrity in7. See the whole
Monday, March 25, 13
1. Eliminate Waste2. Amplify Learning3. Decide as late as possible4. Deliver as fast as possible5. Empower the team6. Build integrity in7. See the whole
Monday, March 25, 13
1. Eliminate Waste2. Amplify Learning3. Decide as late as possible4. Deliver as fast as possible5. Empower the team6. Build integrity in7. See the whole
Monday, March 25, 13
1. Eliminate Waste2. Amplify Learning3. Decide as late as possible4. Deliver as fast as possible5. Empower the team6. Build integrity in7. See the whole
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1. Eliminate Waste ✓2. Amplify Learning3. Decide as late as possible4. Deliver as fast as possible5. Empower the team6. Build integrity in7. See the whole
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unnecessary code and functionality
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Trivia$ cloc bundler/lib bundler/bin
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Bundler Isolate dep
9020 453 145
10MB 8MB N/A
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Rails Sinatra Cuba
230K 5K 201
70MB 20MB 10MB
500 req/sec 1000 req/sec 3000 req/sec
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How much of that do we actually use?
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Hypothesis: 50-90% WASTE
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What if we started to use simple tools?
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cuba ~ rails
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ohm ~ mongoidredis ~ mongodb
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ost ~ resque
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dep ~ bundler
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previously : 230K++ LOCnow : 14K LOC
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UP TO 94% WASTE
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Cons
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Steeper learning curve?
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Relearning
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Slower development?
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Pros
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Performance(as a consequence of simplicity)
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A deeper understanding(closer to the metal)
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Control(you are now the master)
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Our Toolkit
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cubaohmost
moteshieldcutest
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$ gem i gn$ gn -i git://github.com/soveran/app$ gn app
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Questions?
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