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Home Authors Posts by Cristian Velazquez

Cristian Velazquez

Cristian Velazquez is a Sr. Software Engineer II on the Maps Production Engineering team at Uber. He works on multiple efficiency initiatives across multiple organizations. He leads the shadower development to provide Ballast with the best-of-class load generation mechanism.

Engineering Blog Articles

Introducing Ballast: An Adaptive Load Test Framework

As Uber’s architecture has grown to encompass thousands of interdependent microservices, we need to test our mission-critical components at max load in order to preserve reliability. Accurate load testing allows us to validate if a set of services are working

How We Saved 70K Cores Across 30 Mission-Critical Services (Large-Scale, Semi-Automated Go GC Tuning @Uber)



As part of Uber engineering’s wide efforts to reach profitability, recently our team was focused on reducing cost of compute capacity by improving efficiency. Some of the most impactful work was around GOGC optimization. In this blog we want