About Me

In August 2025, I will join the Department of Computer Science at ETH Zurich as an assistant professor. I will be a member of the ETH Systems Group.

Before joining ETH, I spent 3 years at the Systems Research Group at Google. I received my Ph.D. in Computer Science from the University of Wisconsin-Madison, advised by Prof. Jignesh Patel. My research focused on making databases and data processing efficient for modern and emerging hardware via software-hardware codesign. My work was generously supported by a Facebook Fellowship. I received a Bachelor's and a Master's Degree on Computer Science from the University of Athens, Greece, advised by Prof. Yannis Ioannidis.

**If you came here looking for Ioannis Chronis, look no further. Ioannis is my official name that nobody uses :)

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Publications

Filtered Vector Search: State-of-the-art and Research Challenges
Yannis Chronis, Helena Caminal, Yannis Papakonstantinou, Fatma Özcan, Anastasia Ailamaki
VLDB 2025 Tutorial (to appear)

Databases in the Era of Memory-Centric Computing
Yannis Chronis, Anastasia Ailamaki, Lawrence Benson, Helena Caminal, Jana Giceva, Dave Patterson, Eric Sedlar, Lisa Wu Wills
CIDR 2025 PDF

CardBench: A Benchmark for Learned Cardinality Estimation in Relational Databases
Yannis Chronis, Yawen Yang, Yu Gan, Sami Abu-El-Haija, Chelsea Lin, Carsten Binnig, Fatma Ozcan
arxiv PDF GitHub

Simple Adaptive Query Processing vs. Learned Query Optimizers: Observations and Analysis
Yunjia Zhang, Yannis Chronis, Jignesh Patel, Theodoros Rekatsinas
VLDB 2023 PDF

SPA: Economical and Workload-Driven Indexing for Data Analytics in the Cloud
Peter Boncz, Yannis Chronis, Jan Finis, Stefan Halfpap, Viktor Leis, Thomas Neumann, Anisoara Nica, Caetano Sauer, Knut Stolze, Marcin Zukowski
ICDE 2023 PDF

Accelerating Database Analytical Query Workloads using an Associative Processor
Helena Caminal^*, Yannis Chronis^*, Tianshu Wu, Jignesh M. Patel, José F. Martínez
ISCA 2022 PDF

How good is my HTAP system?
Elena Milkai, Yannis Chronis, Kevin P. Gaffney, Zhihan Guo, Jignesh M. Patel, Xiangyao Yu
SIGMOD 2022 PDF

Can Transfer Learning be used to build a Query Optimizer?
Yunjia Zhang, Yannis Chronis, Jignesh Patel, Theodoros Rekatsinas
CIDR 202 PDF

External Merge Sort for Top-K Queries: Eager input filtering guided by histograms
Yannis Chronis, Thanh Do, Goetz Graefe, Keith Peters
SIGMOD 2020 PDF

Efficiently Searching In-Memory Sorted Arrays: Revenge of the Interpolation Search?
Peter VanSandt, Yannis Chronis, Jignesh M. Patel
SIGMOD 2019 PDF Code

Fairness in dataflow scheduling in the cloud
Ilia Pietri, Yannis Chronis, Yannis Ioannidis
Information Systems 2019 PDF

Multi-objective optimization of scheduling dataflows on heterogeneous cloud resources
Ilia Pietri, Yannis Chronis, Yannis Ioannidis
IEEE Big Data 2017 PDF

A Relational Approach to Complex Dataflows
Yannis Chronis, Yannis Foufoulas, Vaggelis Nikolopoulos, Alexandros Papadopoulos, Lefteris Stamatogiannakis, Christoforos Svingos, Yannis Ioannidis
Medal @ EDBT 2016 PDF

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Experience and Awards

Systems Researcher, SRG @ Google, Sunnyvale, USA
2022-2025

Facebook Fellowship Recipient Blog Post
2020-2022

Intern, Microsoft Research and Google
Summer 2017, Summer 2018, Summer 2020

Service

PC

SIGMOD, VLDB, VLDBJ, CIDR, DaMoN, MICRO, SOCC

CIDR Proceedings Chair