Multiday syllabus.txt

Principles
  Who were Benford, Pareto, Zipf and Little?
  Why is premature optimization bad?
  What is benchmarking/profiling?
  How to benchmark an HTTP service
Benchmarking
  Benchmark and benchmark/ips
  What can you benchmark?
  What's a good benchmark?
  Pitfalls
Scaling Services
  Little’s Law
  Erlang traffic analysis
  Understanding latency/throughput
  How to scale any service correctly and identify service bottlenecks
Profiling Memory
  Why we profile memory
  How Ruby GC works in 5 minutes
  The GC Module
  Building your own profiler with ObjectSpace
  More ObjectSpace tricks
  What triggers GC?
  Memory myth 1: memory goes down, right?
  Heap fragmentation
  GC tracing
  derailed benchmarks and profiling startup
  oink
Profiling the Web Request
  rack-mini-profiler
  Profiling in production-like environments
  Auth with RMP
  Understanding the speed badge
    SQL
    time
    Outliers?
  Flamegraphs
  GC Profiler
  Exception profiling
Application Metrics
  Why it's fast on your machine
  Development mode settings
  Latency
  Javascript
  System config
  Virtualization
  What's "fast" for Rails
  Applying the 80/20 rule

ActiveRecord
Measurement
  How to read prod metrics to look for AR issues
  Reproducing issues in dev 
  Diagnosis of N+1
ActiveRecord’s weight
  ActiveRecord::QueryCache
  Profiling an ActiveRecord query
Removing unnecessary SQL
  Preload/includes/eager_load
  What “breaks” preloads?
  Advanced preloading
  Common N+1 traps/scenarios
  Count vs size
  Dynamic view analysis
  Existence checking
Large tables
  Foreign keys
  Understanding AR memory impact
  Batches
  Calculations
  Bulk operations
Basic database scaling
  Erlang analysis review
  DB tips
  How binary tree indexes actually work
  EXPLAIN ANALYZE
  Connection poolers