A recent paper co-authored by researchers from UCLA, Brown, and Stevens received the Best Paper Award at the 50th and final USENIX Annual Technical Conference (ATC), held in Boston in July 2025. The paper, available here, introduces Koala, a benchmark suite designed specifically for the Unix and Linux shell. The researchers created Koala with the aim of catalyzing future research in this long-overlooked area.
Despite its critical role in computing—from system administration to data analysis—the shell has seen relatively little academic research compared to other parts of the software stack. One major reason is the absence of a standard benchmark suite, which has made it difficult to evaluate new techniques and tools.
Koala addresses this gap by offering a representative, reproducible, and extensible benchmark suite tailored to the shell. The project is open source on GitHub and builds on earlier work by Professor Konstantinos Kallas from UCLA, who has developed tools for shell optimization and correctness checking.
This award marks a significant moment in systems research, as USENIX ATC 2025 was both the 50th anniversary and the final edition of the conference. USENIX ATC has historically been the venue for numerous landmark contributions to computing, including early work on Java and networked file systems.
More on the legacy and conclusion of USENIX ATC can be found in the official announcement.