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Blog

The latest from QuestDB

Transaction Cost Analysis with QuestDB and Polars: VWAP, Slippage and Markout

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QuestDBon July 20, 2026

Banner for blog post "Transaction Cost Analysis with QuestDB and Polars: VWAP, Slippage and Markout"

Transaction Cost Analysis with QuestDB and Polars: VWAP, Slippage and Markout

HDFC Bank uses QuestDB for mule account detection across all major 25+ banking channels

by

QuestDBon July 17, 2026

Banner for blog post "HDFC Bank uses QuestDB for mule account detection across all major 25+ banking channels"

HDFC Bank uses QuestDB for mule account detection across all major 25+ banking channels

The Most Expensive Instruction Might Be… cmov

by

Jaromir Hamala

Jaromir Hamalaon July 15, 2026

Banner for blog post "The Most Expensive Instruction Might Be… cmov"

The Most Expensive Instruction Might Be… cmov

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Latest posts

Banner for blog post "Transaction Cost Analysis with QuestDB and Polars: VWAP, Slippage and Markout"

Transaction Cost Analysis with QuestDB and Polars: VWAP, Slippage and Markout

by

QuestDBon July 20, 2026

Transaction Cost Analysis with QuestDB and Polars: VWAP, Slippage and Markout

Banner for blog post "HDFC Bank uses QuestDB for mule account detection across all major 25+ banking channels"

HDFC Bank uses QuestDB for mule account detection across all major 25+ banking channels

by

QuestDBon July 17, 2026

HDFC Bank uses QuestDB for mule account detection across all major 25+ banking channels

Banner for blog post "The Most Expensive Instruction Might Be… cmov"

The Most Expensive Instruction Might Be… cmov

by

Jaromir Hamala

Jaromir Hamalaon July 15, 2026

The Most Expensive Instruction Might Be… cmov

Banner for blog post "The Best Time-Series Databases in 2026 (and How to Choose)"

The Best Time-Series Databases in 2026 (and How to Choose)

by

QuestDBon July 7, 2026

The Best Time-Series Databases in 2026 (and How to Choose)

Banner for blog post "The mask that compiles to nothing: how HotSpot's JIT learned to reason about bits"

The mask that compiles to nothing: how HotSpot's JIT learned to reason about bits

by

Jaromir Hamala

Jaromir Hamalaon July 2, 2026

The mask that compiles to nothing: how HotSpot's JIT learned to reason about bits

Banner for blog post "Lies, Damn Lies and Database Benchmarks"

Lies, Damn Lies and Database Benchmarks

by

Andrey Pechkurov

Andrey Pechkurovon June 18, 2026

Lies, Damn Lies and Database Benchmarks

Banner for blog post "QuestDB Enterprise 3.3.1: storage policies, custom CA, and finer-grained access control"

QuestDB Enterprise 3.3.1: storage policies, custom CA, and finer-grained access control

by

Javier Ramirez

Javier Ramirezon June 12, 2026

QuestDB Enterprise 3.3.1: storage policies, custom CA, and finer-grained access control

Banner for blog post "QuestDB 9.4.2: shareable queries, new aggregates, and a hardening pass"

QuestDB 9.4.2: shareable queries, new aggregates, and a hardening pass

by

Javier Ramirez

Javier Ramirezon June 9, 2026

QuestDB 9.4.2: shareable queries, new aggregates, and a hardening pass

Banner for blog post "Aeron and QuestDB: building open infrastructure for capital markets data"

Capital Markets

Aeron and QuestDB: building open infrastructure for capital markets data

by

QuestDBon June 5, 2026

Aeron and QuestDB: building open infrastructure for capital markets data

Banner for blog post "One Trading runs a regulated 24/7 futures exchange on QuestDB"

One Trading runs a regulated 24/7 futures exchange on QuestDB

by

QuestDBon May 29, 2026

One Trading runs a regulated 24/7 futures exchange on QuestDB

Banner for blog post "QuestDB 9.4.0: Posting index, cross-column fill, and smarter Web Console"

QuestDB 9.4.0: Posting index, cross-column fill, and smarter Web Console

by

Javier Ramirez

Javier Ramirezon May 19, 2026

QuestDB 9.4.0: Posting index, cross-column fill, and smarter Web Console

Banner for blog post "How we made WINDOW JOIN parallel and vectorized"

How we made WINDOW JOIN parallel and vectorized

by

Andrey Pechkurov

Andrey Pechkurovon May 12, 2026

How we made WINDOW JOIN parallel and vectorized

Banner for blog post "Sparklines for traders: candlesticks and depth charts in SQL"

Sparklines for traders: candlesticks and depth charts in SQL

by

Javier Ramirez

Javier Ramirezon May 4, 2026

Sparklines for traders: candlesticks and depth charts in SQL

Banner for blog post "Code review turned a 3x speedup into 8.9x (off-heap HdrHistogram in QuestDB)"

Code review turned a 3x speedup into 8.9x (off-heap HdrHistogram in QuestDB)

by

Javier Ramirez

Javier Ramirezon April 21, 2026

Code review turned a 3x speedup into 8.9x (off-heap HdrHistogram in QuestDB)

Banner for blog post "Aquis Exchange (SIX Group) runs exchange-wide surveillance on QuestDB"

Aquis Exchange (SIX Group) runs exchange-wide surveillance on QuestDB

by

QuestDBon April 16, 2026

Aquis Exchange (SIX Group) runs exchange-wide surveillance on QuestDB

Archive

QuestDB 9.3.5: Lateral Joins, UNNEST & Window Stats

by

Javier Ramirez

Javier Ramirezon April 13, 2026

QuestDB 9.3.5: Lateral Joins, UNNEST & Window Stats

Zero-Shot Time-Series Forecasting with QuestDB and Google's TimesFM

by

Javier Ramirez

Javier Ramirezon April 9, 2026

Zero-Shot Time-Series Forecasting with QuestDB and Google's TimesFM

QuestDB 9.3.4: Dynamic WINDOW JOIN & Parquet Bloom Filters

by

Javier Ramirez

Javier Ramirezon April 1, 2026

QuestDB 9.3.4: Dynamic WINDOW JOIN & Parquet Bloom Filters

Building a real-time multi-exchange charting platform with QuestDB

by

Arden Chartson March 23, 2026

Building a real-time multi-exchange charting platform with QuestDB

Benchmark and comparison: QuestDB vs. ClickHouse

by

Vlad Ilyushchenko

Vlad Ilyushchenkoon March 18, 2026

Benchmark and comparison: QuestDB vs. ClickHouse

From 3 Seconds to 38 Milliseconds: Why SAMPLE BY Order Matters

by

Javier Ramirez

Javier Ramirezon March 17, 2026

From 3 Seconds to 38 Milliseconds: Why SAMPLE BY Order Matters

QuestDB and the Modern Data Stack: Bridging Time Series, OLAP, and the Lakehouse

by

Javier Ramirez

Javier Ramirezon March 11, 2026

QuestDB and the Modern Data Stack: Bridging Time Series, OLAP, and the Lakehouse

QuestDB Enterprise 3.2.3: WAL cleaner, TLS metrics, and HORIZON JOIN

by

Javier Ramirez

Javier Ramirezon March 4, 2026

QuestDB Enterprise 3.2.3: WAL cleaner, TLS metrics, and HORIZON JOIN

QuestDB: Best Trading Analytics Platform 2026

by

Javier Ramirez

Javier Ramirezon March 3, 2026

QuestDB: Best Trading Analytics Platform 2026

QuestDB 9.3.3: HORIZON JOIN, twap(), and JIT on ARM64

by

Javier Ramirez

Javier Ramirezon February 27, 2026

QuestDB 9.3.3: HORIZON JOIN, twap(), and JIT on ARM64

The Windows DLL loader lock: how a Rust thread can hang your JVM

by

QuestDBon February 26, 2026

The Windows DLL loader lock: how a Rust thread can hang your JVM

QuestDB 9.3.2: TICK, arg_max, and Exponential Moving Averages

by

Javier Ramirez

Javier Ramirezon February 4, 2026

QuestDB 9.3.2: TICK, arg_max, and Exponential Moving Averages