ClickHouse/ClickBench
Nov 2024 – Mar 2026
8 Months active
Languages Used
BashSQLJavaScriptShellHTMLJSONC++
Technical Skills
Database Performance TuningPerformance BenchmarkingShell ScriptingBenchmarkingData AnalysisDatabase Benchmarking
Andrei Pechkurov
PROFILE
Andrei Pechkurov
Worked extensively on the ClickHouse/ClickBench repository, delivering a series of upgrades and enhancements to the benchmarking suite for QuestDB. Focused on maintaining up-to-date performance comparisons, this developer upgraded QuestDB versions, aligned SQL schemas, and improved data consistency across deployments. They implemented in-memory tagging and metadata harmonization using C++, JavaScript, and SQL, optimizing data handling and searchability. Their work included refining performance dashboards, ensuring cross-database query consistency, and validating benchmark results across multiple configurations. By addressing both feature development and bug fixes, they enhanced reliability, reduced maintenance overhead, and enabled faster, more accurate analytics for stakeholders evaluating database performance.
Overall Statistics
Feature vs Bugs
78%Features
Repository Contributions
14Total
Bugs
2
Commits
14
Features
7
Lines of code
2,538
Activity Months8
Your Network
77 peopleShared Repositories
77
Work History
March 2026
1 Commits
Mar 1, 2026March 2026 monthly summary for ClickHouse/ClickBench focusing on cross-database consistency improvements and reliability. Delivery centered on aligning URL and Referer length calculations with QuestDB behavior to ensure consistent results across database systems.
1 Commits
Mar 1, 2026March 2026 monthly summary for ClickHouse/ClickBench focusing on cross-database consistency improvements and reliability. Delivery centered on aligning URL and Referer length calculations with QuestDB behavior to ensure consistent results across database systems.
March 2026
February 2026
4 Commits • 1 Features
Feb 1, 2026February 2026: Delivered In-Memory Tagging and Metadata Harmonization for Results in ClickBench, enabling consistent tagging across configurations and filtering, and improving data handling, searchability, and performance for result data. Implemented in-memory tagging for DataFrame results to accelerate queries and reduce memory churn. Replaced fragile name-based regex with a robust tag-based approach, added missing tags, and removed incorrect ones to ensure metadata accuracy. Business impact includes faster lookups, improved data governance, and reduced maintenance for tagging logic.
February 2026
4 Commits • 1 Features
Feb 1, 2026February 2026: Delivered In-Memory Tagging and Metadata Harmonization for Results in ClickBench, enabling consistent tagging across configurations and filtering, and improving data handling, searchability, and performance for result data. Implemented in-memory tagging for DataFrame results to accelerate queries and reduce memory churn. Replaced fragile name-based regex with a robust tag-based approach, added missing tags, and removed incorrect ones to ensure metadata accuracy. Business impact includes faster lookups, improved data governance, and reduced maintenance for tagging logic.
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for ClickBench (ClickHouse/ClickBench). Delivered a QuestDB 9.3.1 upgrade and adjusted SQL queries to accommodate new event-time handling, accompanied by re-baselined benchmark results to reflect the updated behavior. The upgrade and baseline ensure accurate performance comparisons and compatibility with the latest QuestDB, reducing risk in analytics workloads and informing product decisions. Commit reference for traceability: c4549bec359c71f1cf0f4ff36b284caa0629be72.
1 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for ClickBench (ClickHouse/ClickBench). Delivered a QuestDB 9.3.1 upgrade and adjusted SQL queries to accommodate new event-time handling, accompanied by re-baselined benchmark results to reflect the updated behavior. The upgrade and baseline ensure accurate performance comparisons and compatibility with the latest QuestDB, reducing risk in analytics workloads and informing product decisions. Commit reference for traceability: c4549bec359c71f1cf0f4ff36b284caa0629be72.
January 2026
December 2025
1 Commits • 1 Features
Dec 1, 20252025-12 monthly summary for ClickBench: Delivered a major feature upgrade by updating QuestDB to 9.2.3 with schema consistency enhancements and comprehensive benchmark validation across multiple configurations. This work reduces deployment inconsistencies, provides validated performance data, and strengthens reliability of analytics workloads. No separate critical bugs fixed this month; focus was on upgrade, data model alignment, and performance verification to enable faster time-to-value for stakeholders.
December 2025
1 Commits • 1 Features
Dec 1, 20252025-12 monthly summary for ClickBench: Delivered a major feature upgrade by updating QuestDB to 9.2.3 with schema consistency enhancements and comprehensive benchmark validation across multiple configurations. This work reduces deployment inconsistencies, provides validated performance data, and strengthens reliability of analytics workloads. No separate critical bugs fixed this month; focus was on upgrade, data model alignment, and performance verification to enable faster time-to-value for stakeholders.
November 2025
2 Commits • 1 Features
Nov 1, 2025Concise monthly summary for 2025-11 focused on ClickHouse/ClickBench: Key features delivered include QuestDB upgrade to 9.2.2 with ARM-compatible benchmark/script updates. Major bugs fixed include correcting min-score calculation for Cold/Hot Run tabs by filtering nulls and handling sub-millisecond times. Overall impact: improved score accuracy and reliability of performance dashboards, expanded platform compatibility, and a solid baseline for future benchmarking. Technologies demonstrated: QuestDB upgrade, ARM benchmarking, benchmark scripting, data filtering for performance metrics, and end-to-end validation of scoring logic.
2 Commits • 1 Features
Nov 1, 2025Concise monthly summary for 2025-11 focused on ClickHouse/ClickBench: Key features delivered include QuestDB upgrade to 9.2.2 with ARM-compatible benchmark/script updates. Major bugs fixed include correcting min-score calculation for Cold/Hot Run tabs by filtering nulls and handling sub-millisecond times. Overall impact: improved score accuracy and reliability of performance dashboards, expanded platform compatibility, and a solid baseline for future benchmarking. Technologies demonstrated: QuestDB upgrade, ARM benchmarking, benchmark scripting, data filtering for performance metrics, and end-to-end validation of scoring logic.
November 2025
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025: Updated the ClickBench benchmarking suite to stay current with QuestDB 9.1.0 by adapting the benchmark script and the database schema. The create.sql was updated to reflect the new IPv4 data type for IP addresses, ensuring compatibility with the latest release. No major bugs fixed in this scope. These changes improve benchmarking reliability, accuracy of performance comparisons, and readiness for release decisions.
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025: Updated the ClickBench benchmarking suite to stay current with QuestDB 9.1.0 by adapting the benchmark script and the database schema. The create.sql was updated to reflect the new IPv4 data type for IP addresses, ensuring compatibility with the latest release. No major bugs fixed in this scope. These changes improve benchmarking reliability, accuracy of performance comparisons, and readiness for release decisions.
August 2025
3 Commits • 1 Features
Aug 1, 2025August 2025 (ClickBench): Delivered a focused benchmark refresh and upgrade to keep performance comparisons current and actionable. Upgraded the QuestDB benchmark to v9.0.2, refreshed benchmark data across cloud providers for ClickHouse and QuestDB, including new entries and updated import parameters (maxUncommittedRows) to better reflect real-world workloads. Addressed review feedback to stabilize results and regression tests. This work improves benchmark accuracy, speed to update benchmarks, and cross-provider comparability for customers evaluating ClickHouse performance.
3 Commits • 1 Features
Aug 1, 2025August 2025 (ClickBench): Delivered a focused benchmark refresh and upgrade to keep performance comparisons current and actionable. Upgraded the QuestDB benchmark to v9.0.2, refreshed benchmark data across cloud providers for ClickHouse and QuestDB, including new entries and updated import parameters (maxUncommittedRows) to better reflect real-world workloads. Addressed review feedback to stabilize results and regression tests. This work improves benchmark accuracy, speed to update benchmarks, and cross-provider comparability for customers evaluating ClickHouse performance.
August 2025
November 2024
1 Commits • 1 Features
Nov 1, 2024Concise monthly summary for 2024-11: Key feature delivered in ClickBench was the QuestDB v8.2 Benchmark Update, ensuring the benchmark suite reflects the latest QuestDB version, with legacy scripts and SQL files for the previous version removed to prevent drift. The update improves accuracy and reliability of performance comparisons against QuestDB 8.2, enabling faster, data-driven decision-making for performance optimization and capacity planning.
November 2024
1 Commits • 1 Features
Nov 1, 2024Concise monthly summary for 2024-11: Key feature delivered in ClickBench was the QuestDB v8.2 Benchmark Update, ensuring the benchmark suite reflects the latest QuestDB version, with legacy scripts and SQL files for the previous version removed to prevent drift. The update improves accuracy and reliability of performance comparisons against QuestDB 8.2, enabling faster, data-driven decision-making for performance optimization and capacity planning.
Activity
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Quality Metrics
Correctness91.4%
Maintainability90.0%
Architecture90.0%
Performance91.4%
AI Usage22.8%
Skills & Technologies
Programming Languages
BashC++HTMLJSONJavaScriptSQLShell
Technical Skills
BenchmarkingC++Data AnalysisDatabase BenchmarkingDatabase ManagementDatabase Performance TuningDevOpsJavaScriptPerformance BenchmarkingPerformance TestingPerformance TuningSQL queryingSQL scriptingScriptingShell Scripting
Repositories Contributed To
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