Quoras Approach To Moving Fast Sustainably (In Ten Lessons) Nikhil - - PowerPoint PPT Presentation

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Quoras Approach To Moving Fast Sustainably (In Ten Lessons) Nikhil - - PowerPoint PPT Presentation

Oct 10, 2023 279 likes •927 views

Quoras Approach To Moving Fast Sustainably (In Ten Lessons) Nikhil Garg (@nikhilgarg) Qcon San Francisco, 11/18/2015 IIT Delhi Quoras Mission To Grow And Share Worlds Knowledge Quora is a place where a normal teenager from a

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Quora’s Approach To Moving Fast Sustainably

(In Ten Lessons)

Nikhil Garg (@nikhilgarg) Qcon San Francisco, 11/18/2015

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IIT Delhi

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To Grow And Share World’s Knowledge

Quora’s Mission

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“Quora is a place where a normal teenager from a remote Asian country can get direct advice from world’s top astronauts, programmers, novelists and many others.”

Rajeeb Banstola

High School Student, Nepal

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@Quora { Founded in 2010 65 Engineers Python, JS, C++ }

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  • 1. Moving Fast
  • 2. Moving Fast Recklessly
  • 3. Ten Lessons For Sustainability
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  • 1. Moving Fast
  • 2. Moving Fast Recklessly
  • 3. Ten Lessons For Sustainability
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Maximizing Innovation

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Winner Takes All

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  • 1. Moving Fast
  • 2. Moving Fast Recklessly
  • 3. Ten Lessons For Sustainability
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Code Becomes Messy

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Developers Become Unhappy

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Development Can Just Halt

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...So Must Move Fast, Sustainably

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  • 1. Moving Fast
  • 2. Moving Fast Recklessly
  • 3. Ten Lessons For Sustainability
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  • 1. Move Fast, On Average
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2: Think Long Enough Term

  • 2. Define Your Long-Enough Term
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  • 3. Do The Math. There IS Free Lunch
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Building a Linter takes 4 weeks (160 hours) Saves 1 hour per developer per week At 50 developers, saves 50 hours per week Saves 400 hours in 8 more weeks

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Qlint: Quora’s Python Linter

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Soon Going to Open Source Qlint :)

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  • 4. Commit Publicly
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Define your long-enough term Publicly commit to it Empower developers to order free-lunch Enjoy higher increased average speed

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  • 5. Cut Corners In Scope
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  • 6. Optimize Productivity Bottlenecks
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Testing At Quora

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  • 7. Reward Acceleration
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Code Cleanup

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Automation

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  • 8. Prevent Deceleration
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Slow Creep Of Complexity

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Batched Code Cleanup At Quora

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Codebase Is A Tree

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  • 9. Optimize Processes
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Continuous Deployment

‘Git Push’ To Production In 10 Minutes

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  • 10. Be Practical, Not Ideological
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Code Reviews Are Awesome

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Style / Design Education / Collaboration Correctness [?]

[?] http://research.microsoft.com/pubs/180283/ICSE%202013-codereview.pdf

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But Pre-Commit Reviews Are Costly

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(Code is reviewed after it goes to production)

Post Commit Code Reviews

Taking continuous deployment to the next level

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Style / Design Education / Collaboration Correctness [?] → Testing

[?] http://research.microsoft.com/pubs/180283/ICSE%202013-codereview.pdf

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Fall Back To Pre-Commit Reviews

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Codebase Is A Tree

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Easier to ask for forgiveness than permission!

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Avoid truly terrible outcomes Maximize expected speed Minimize bad outcomes

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Summary

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Move Fast, On Average Define Your Long Enough Term Do the Math. There IS Free Lunch Commit Publicly Cut Corners In Scope Optimize Productivity Bottlenecks Reward Acceleration Prevent Deceleration Optimize Processes Be Practical, Not Ideological

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  • Empower developers to move fast on average over

long enough term by getting free lunch.

  • Profile productivity like code, measure, optimize,

make practical trade-offs.

  • Post commit code reviews work, codebase is a tree.
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Nikhil Garg @nikhilgarg28 { Gmail, Github, Twitter, LinkedIn }

Thank you!

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