Emery Berger
Computer Scientist at University of Massachusetts Amherst
Amherst, Massachusetts, United States
Summary
🤩
RockstarEmery Berger is a Computer Scientist and professor at UMass Amherst with 14 years of experience blending systems research and production-quality engineering. He co-directs the PLASMA lab and is an Amazon Scholar known for high-impact open-source projects such as Scalene, Slipcover, Coz (causal profiler), Hoard, Mesh, and CSrankings. His work focuses on memory allocators, performance profiling, and tooling that bridges research and real-world use—often contributing low-level C/C++/Rust patches, platform compatibility fixes, and benchmark suites. Emery’s projects are notable for shipping both novel research (e.g., Mesh’s automated memory reduction) and practical infrastructure used by the community, and he maintains CSrankings, a widely used academic-ranking web app. Colleagues describe him as equally comfortable refactoring core allocators and orchestrating DevOps for public-facing tools, a mix that accelerates adoption of research prototypes. Based in Amherst, MA, he pairs academic leadership with hands-on contributions that reveal a preference for measurable performance improvements over theoretical elegance alone.
13 years of coding experience
Stackoverflow
3,927reputation
499kreached
89answers
0questions
memory-management
top-5%
Github Skills (28)
javascript10
memory-allocation10
c-language10
malloc10
main-memory10
jquery10
bootstrap10
back-end-development10
memory-management10
performance-analysis10
performance-optimization10
html10
bootstra10
cprogramming-language10
profiler10
Programming languages (14)
Github contributions (5)
emeryberger/Hoard
Jun 2012 - Apr 2022
The Hoard Memory Allocator: A Fast, Scalable, and Memory-efficient Malloc for Linux, Windows, and Mac.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 releases, 515 commits, 19 PRs in 9 years 11 months
Contributions summary:Emery contributed to the `hoard` memory allocator by adding a benchmark suite to measure and analyze the performance of the memory management system. Their changes included modifications to existing C++ code, specifically related to memory allocation, deallocation, and potentially reallocations, indicated by the addition of test benchmarks and the modification of source code files. Furthermore, changes indicate the user has made alterations to Mac-specific locks to facilitate OS X compatibility.
memoryhoardmemory-managerallocatormemory-allocation
emeryberger/CSrankings
May 2016 - Jan 2023
A web app for ranking computer science departments according to their research output in selective venues, and for finding active faculty across a wide range of areas.
Role in this project:Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:1407 reviews, 6726 commits, 5636 PRs in 6 years 9 months
Contributions summary:Emery's commits primarily focus on back-end enhancements and setting up the necessary tools. The user implemented new code for setting start and end year values. Further commits show a focus on frontend development, UI component additions, and refactoring work.
dblpreactscienceresearch-outputselective
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