Looking back on Speedshop's 2019 in 41 newsletters, blogs and conference talks

• 3 ActiveRecord Mistakes That Slow Down Rails Apps: Count, Where and Present. This post was Ruby Weekly's most popular post of 2019.
• Why Your Rails App is Slow: Lessons Learned from 3000+ Hours of Teaching
• The World Follows Power Laws: Why Premature Optimization is Bad

• Benchmarking and Profiling 101 at RailsConf 2019 I was very proud of how this talk turned out visually.
• Determining Process Counts in Ruby Web Applications at RubyKaigi 2019

• What Should I Set Concurrency To? This was originally sent in plaintext so the formatting is a bit whack.
• Idempotency: Problems
• Idempotency: Solutions
• Database connection math in Sidekiq
• Memory leaks and high memory usage in Sidekiq
• Fixing memory bloat

• What happened at RailsConf and RubyKaigi?
• What happens at my workshops?
• Would rewriting your app as microservices make it faster?
• Erlang: The Man, The Language, The Unit
• The Two Reasons to Improve Your App's Performance
• Minimum Viable Rails - Improve Memory Use by Changing a Dozen Lines
• Request Queueing - The One Metric You Should Be Tracking, But Don't
• What the Heck is Time Consumed?
• The Most Helpful ActiveRecord Setting That No One Uses
• Practice is Harder than Theory: Practicing on the Real Thing
• The Scientific Method for Performance
• The DRM Method: Database, Ruby, Memory
• What is the ActiveRecord QueryCache?
• Performance in Design
• What the Hell is the GVL, Anyway?
• Observing the GVL in Action
• The GVL and C Extensions
• How OSS Maintainership Must Change
• Understanding Memory Allocation Metrics
• Should You Run Puma with Multiple Threads or Not?
• Read Replicas: Problems
• Read Replicas: Solutions
• Reading New Relic's Ruby VM Tab: Part One
• Reading New Relic's Ruby VM Tab: Part Two
• On Puma Worker Killer: Part One
• On Puma Worker Killer: Part Two
• Gaming Benchmarks with Relative Differences
• How to Read Flamegraphs
• Ruby's New Corporate Culture
• The Benchmarks Every Rails App Should be Hitting