google/xls
Nov 2024 – May 2025
3 Months active
Languages Used
XLS-DSLXLSXLS AssemblyC++DSLDSL-X
Technical Skills
Compression AlgorithmsDigital DesignHardware Description LanguageLow-Level OptimizationLow-level OptimizationZstandard Decompression
Krzysztof Obłonczek
PROFILE
Krzysztof Obłonczek
Over a three-month period, contributed to the google/xls repository by developing and enhancing Zstandard decompression features, focusing on high-performance Finite State Entropy (FSE) table creation and decoding. Leveraged DSLX and SystemVerilog to implement modular components, integrating them into the existing zstd module for cohesive build and runtime behavior. Refactored core modules to support compressed FSE tables, improved sequence decoding robustness, and expanded test coverage with end-to-end and regression tests. Addressed toolchain compatibility and introduced a reset mechanism for the ZstdDecoder, resulting in improved throughput and reliability for large XLS inputs in production data workflows. Fixed one critical bug.
Overall Statistics
Feature vs Bugs
75%Features
Repository Contributions
7Total
Bugs
1
Commits
7
Features
3
Lines of code
9,403
Activity Months3
Your Network
118 peopleSame Organization
@antmicro.com44
Work History
May 2025
3 Commits • 1 Features
May 1, 2025May 2025 monthly summary for google/xls. Delivered ZstdDecoder enhancements with a reset mechanism, integration of CompressedBlockDecoder, and expanded testing, strengthening the reliability and performance of the Zstd decoding path. Implemented toolchain adjustments to support the new components and added DSLX tests for ZstdDecoder coverage. No major defects fixed this period; primary focus was feature delivery and test improvements with measurable business value.
3 Commits • 1 Features
May 1, 2025May 2025 monthly summary for google/xls. Delivered ZstdDecoder enhancements with a reset mechanism, integration of CompressedBlockDecoder, and expanded testing, strengthening the reliability and performance of the Zstd decoding path. Implemented toolchain adjustments to support the new components and added DSLX tests for ZstdDecoder coverage. No major defects fixed this period; primary focus was feature delivery and test improvements with measurable business value.
May 2025
January 2025
3 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for google/xls focusing on performance, reliability, and business impact. Delivered a major overhaul of Zstandard decompression to support compressed FSE tables, improved efficiency, and refactored key components for future extensibility. Fixed a critical robustness issue in sequence decoding by ensuring the predefined offset table is used when specified, with regression tests added to prevent regressions. Overall, enhanced throughput for large XLS inputs and increased reliability of the decoding path.
January 2025
3 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for google/xls focusing on performance, reliability, and business impact. Delivered a major overhaul of Zstandard decompression to support compressed FSE tables, improved efficiency, and refactored key components for future extensibility. Fixed a critical robustness issue in sequence decoding by ensuring the predefined offset table is used when specified, with regression tests added to prevent regressions. Overall, enhanced throughput for large XLS inputs and increased reliability of the decoding path.
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024: Focused on enabling high-performance Zstandard decompression via a new Finite State Entropy (FSE) path. Delivered table creation and decoding support, with modular DSLX components and end-to-end tests, integrated into the google/xls zstd module.
1 Commits • 1 Features
Nov 1, 2024November 2024: Focused on enabling high-performance Zstandard decompression via a new Finite State Entropy (FSE) path. Delivered table creation and decoding support, with modular DSLX components and end-to-end tests, integrated into the google/xls zstd module.
November 2024
Activity
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Quality Metrics
Correctness87.2%
Maintainability80.0%
Architecture83.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++DSLDSL-XXLSXLS AssemblyXLS-DSL
Technical Skills
AXI ProtocolCompression AlgorithmsDigital DesignEmbedded SystemsHardware Description LanguageHardware DesignLow-Level OptimizationLow-level OptimizationSystemVerilogTest-Driven DevelopmentVerilog/SystemVerilogZstandard DecompressionZstd Compression
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