Building Koi Pond - Simulating Millions of Slack Clients

Dive into a captivating conference talk that unveils the journey of Slack's performance infrastructure team as they tackled the challenge of creating a load testing solution capable of simulating hundreds of thousands of users in a single team. Explore the two-month prototyping process, discovering the delicate balance between high-fidelity usage simulation, efficient resource utilization, and rapid execution. Experience a thrilling live demonstration of the resulting load testing systems and gain insights into scaling a product from 60,000 users per team to over 2 million. Learn from Maude Lemaire, a Senior Staff Engineer at Slack, as she shares her expertise in large-scale load test tooling, performance regression monitoring, and successfully onboarding major companies to the platform. Discover valuable lessons in building strong, empathetic engineering cultures and navigating complex refactors in large-scale systems.