Uber has extensively adopted Go as a primary programming language for developing microservices. Our Go monorepo consists of about 50 million lines of code and contains approximately 2,100 unique Go services. Go makes concurrency a first-class citizen; prefixing function calls …
Milind Chabbi
Milind Chabbi is a Staff Researcher in the Programming Systems Research team at Uber. He leads research initiatives across Uber in the areas of compiler optimizations, high-performance parallel computing, synchronization techniques, and performance analysis tools to make large, complex computing systems reliable and efficient.
Engineering Blog Articles
CRISP: Critical Path Analysis for Microservice Architectures
Uber’s backend is an exemplar of microservice architecture. Each microservice is a small, individually deployable program performing a specific business logic (operation). The microservice architecture is a type of distributed computing system, which is suitable for independent deployments and scaling …
pprof++: A Go Profiler with Hardware Performance Monitoring
Motivation for a Better Go Profiler
Golang is the lifeblood of thousands of Uber’s back-end services, running on millions of CPU cores. Understanding our CPU bottlenecks is critical, both for reducing service latencies and also for making our compute fleet …
How Uber Deals with Large iOS App Size
The App Size Problem
Uber’s iOS mobile Apps for Rider, Driver, and Eats are large in size. The choice of Swift as our primary programming language, our fast-paced development environment and feature additions, layered software and its dependencies, and statically …
Research Papers
Optimization of Swift Protocols
R. Barik, M. Sridharan, M. K. Ramanathan, M. Chabbi
Swift, an increasingly-popular programming language, advocates the use of protocols, which define a set of required methods and properties for conforming types. Protocols are commonly used in Swift programs for abstracting away implementation details; e.g., in a large industrial app from Uber, they are heavily used to enable mock objects for unit testing. Unfortunately, heavy use of protocols can result in significant performance overhead. [...] [PDF]
Object-Oriented Programming, Systems, Languages & Applications (OOPSLA), 2019
Swift, an increasingly-popular programming language, advocates the use of protocols, which define a set of required methods and properties for conforming types. Protocols are commonly used in Swift programs for abstracting away implementation details; e.g., in a large industrial app from Uber, they are heavily used to enable mock objects for unit testing. Unfortunately, heavy use of protocols can result in significant performance overhead. [...] [PDF]
Object-Oriented Programming, Systems, Languages & Applications (OOPSLA), 2019