Various tips & tricks

Sampling CPU profiler for Ruby

Optimized top-N-per-group Active Record associations using lateral joins

All the basic metrics of Sidekiq with pluggable contribs prepared for Prometheus

kubectl plugin to list allocations (cpu, memory, gpu,... X utilization, requested, limit, allocatable,...)

Prometheus-based Kubernetes Resource Recommendations

Telemetry plugin for puma offering various targets to publish

Ruby Date Recurrence Library - Allows easy creation of recurrence rules and fast querying

Ruby Sorted Containers: Sorted Array, Sorted Hash, and Sorted Set

A distributed thread-per-core document database

Tooling for Ruby heap dumps

This is an online course where you can learn and master the skill of low-level performance analysis and tuning.

Rate limiter for Rails based on leaky buckets

Researching background jobs fairness

Official Ruby gems for the Judoscale Heroku add-on

Techniques and numbers for estimating system's performance from first-principles

Set of GVL instrumentation tools

Bootstrap Kubernetes the hard way. No scripts.

Online MySQL schema migrations

Streaming downloads using Net::HTTP, http.rb or HTTPX

A StatsD client for Ruby apps. Provides metaprogramming methods to inject StatsD instrumentation into your code.

like strace, but for ruby code

Scalable real-time messaging server in a language-agnostic way. Self-hosted alternative to Pubnub, Pusher, Ably. Set up once and forever.

High performance server-side application framework

Get suggestions to tune Ruby's garbage collector

Efficient, Immutable, Thread-Safe Collection classes for Ruby

Queries to mesure statistical bloat in indexes and tables for PostgreSQL

Track the load progress of your Bundler-based projects

🔍 Rails N+1 queries auto-detection with zero false positives / false negatives

Automatically add frozen_string_literals to selected files at compile time