Welcome

I am a software developer; my main area of interest is information retrieval (including but not limited to web search), but I dabble in all sorts of (mostly backend) software development.

Feel free to check out my Github and Sourcehut repositories, my LinkedIn profile, contact me via email, or follow me on Mastodon.

If you are interested in my academic work, check out the Publications section.

Links

Email: contact@siedlaczek.me
Github: https://github.com/elshize
Sourcehut: https://sr.ht/~elshize/
Mastodon: https://fosstodon.org/@msiedlaczek
LinkedIn: https://www.linkedin.com/in/siedlaczek/

Publications

Efficient In-Memory Inverted Indexes: Theory and Practice
Joel Mackenzie, Sean MacAvaney, Antonio Mallia, Michal Siedlaczek
Proceedings of the 48th International ACM SIGIR Conference on Research and Development in Information Retrieval. 2025

Using Conjunctions for Faster Disjunctive Top-k Queries
Michal Siedlaczek, Antonio Mallia, Torsten Suel
Proceedings of the 15th ACM International Conference on Web Search and Data Mining. 2022.

Efficiency and Scalability of Large Search Architectures
PhD Dissertation

Fast Disjunctive Candidate Generation Using Live Block Filtering
Antonio Mallia, Michal Siedlaczek, Torsten Suel
Proceedings of the 14th ACM International Conference on Web Search and Data Mining. 2021.

Comparing Top-k Threshold Estimation Techniques for Disjunctive Query Processing
Antonio Mallia, Michal Siedlaczek, Torsten Suel
Proceedings of the 29th ACM International Conference on Information & Knowledge Management. 2020.

Supporting Interoperability Between Open-Source Search Engines with the Common Index File Format
Jimmy Lin, Joel Mackenzie, Chris Kamphuis, Craig Macdonald, Antonio Mallia, Michał Siedlaczek, Andrew Trotman, Arjen de Vries. Proceedings of the 43rd International ACM SIGIR Conference on Research and Development in Information Retrieval. 2020.

Forward Index Compression for Instance Retrieval in an Augmented Reality Application
Qi Wang, Michal Siedlaczek, Yen-Yu Chen, Michael Gormish, Torsten Suel. In Proceedings of 2019 IEEE Big Data Conference. 2019.

GPU-Accelerated Decoding of Integer Lists
Antonio Mallia, Michal Siedlaczek, Torsten Suel and Mohamed Zahran. In Proceedings of the 28th ACM International Conference on Information and Knowledge Management (CIKM). 2019.

PISA: Performant Indexes and Search for Academia
Antonio Mallia, Michał Siedlaczek, Joel Mackenzie, Torsten Suel. In Proceedings of the Open-Source IR Replicability Challenge (OSIRRC 2019). 2019.

Exploiting Global Impact Ordering for Higher Throughput in Selective Search
Michał Siedlaczek, Juan Rodriguez, Torsten Suel. In Proceedings of 41st European Conference on Information Retrieval. 2019.
[Poster]

An Experimental Study of Index Compression and DAAT Query Processing Methods
Antonio Mallia, Michał Siedlaczek, Torsten Suel. In Proceedings of 41st European Conference on Information Retrieval. 2019.

Fast bag-of-words candidate selection in content-based instance retrieval systems
Michał Siedlaczek, Qi Wang, Yen-Yu Chen, and Torsten Suel. In Proceedings of 2018 IEEE Big Data Conference. 2018.
[Slides]