OpenSpiel is a collection of environments and algorithms for research in general reinforcement learning and search/planning in games.

Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics

TPC-H benchmark data generation in pure Rust

A minimal blog theme for zola, well crafted

Performance comparisons between various virtual interpreter implementation strategies

A modern formatting library

QBE IR in natural Rust data structures

Apache Pinot - A realtime distributed OLAP datastore

Port of TPC-H dbgen to Java

A hash table with consistent order and fast iteration; access items by key or sequence index

Easy flamegraphs for Rust projects and everything else, without Perl or pipes <3

Concurrency permutation testing tool for Rust.

Inside OpenJDK and the HotSpot Java Virtual Machine

Benchmark to measure the memory bandwidth of the CPU

advanced compilers

Apache Parquet Java

A command-line benchmarking tool

Apache DataFusion Benchmarks

a categorical deep learning compiler

Query Engine in Java with Vectorized and Data Driven Code Generation and Arrow & Parquet support

C++20 idiomatic APIs for the Apache Arrow Columnar Format

MLX: An array framework for Apple silicon

An extensible, state of the art columnar file format

A course of building an LSM-Tree storage engine (database) in a week.

PlayStation 4 emulator for Windows, Linux and macOS written in C++

Coppice is a dynamic programming library for acyclic analytical queries expressed as nested map/reduce computations

A framework for building database systems by high-level programming, and getting really good performance nevertheless.

Tracing-based reverse mode automatic differentiation (like autograd!)

A machine learning compiler for GPUs, CPUs, and ML accelerators