PLASMA @ UMass ORG

Scalene: a high-performance, high-precision CPU, GPU, and memory profiler for Python with AI-powered optimization proposals

A Python profiler from UMass Amherst that pinpoints exactly which lines of code are slow or wasting memory, with only 10-20% runtime overhead, far less than standard profilers, plus AI-powered fix suggestions.

Coz: Causal Profiling

ChatDBG - AI-assisted debugging. Uses AI to answer 'why'

Near Zero-Overhead Python Code Coverage

"See why!" Explains and suggests fixes for compile-time errors for C, C++, C#, Go, Java, LaTeX, PHP, Python, Ruby, Rust, and TypeScript

SQLwrite: AI in your DBMS! Automatically converts natural language queries to SQL.

Browsix is a Unix-like operating system for the browser.

Breaks the browser language barrier (includes a plugin-free JVM).

A memory allocator that automatically reduces the memory footprint of C/C++ applications.

BLeak: Automatically Debugging Memory Leaks in Web Applications

Automatic AI-powered test suite generator

Graph Sampling using GPU

Measures empirical computational complexity (in both time and space) of functions

Excel 2010/2013 add-in that automatically finds errors in spreadsheets

Init system in Go, intended to run on Browsix and other Unix-like OS. Part of GSoC 2016 project.

Sheriff consists of two tools: Sheriff-Detect, a false-sharing detector, and Sheriff-Protect, a false-sharing eliminator that you can link with your code to eliminate false sharing.

Automatically comments Python code, adding docstrings and type annotations, with optional translation to other languages.

Pythoness: use natural language to define Python functions.

The space of memory management research and systems produced by the PLASMA lab (https://plasma-umass.org).

Evidence-based dynamic analysis: a fast checker for memory errors.

Predator: Predictive False Sharing Detection

Python interpreter in JavaScript

dthreads: Efficient Deterministic Multithreading

Stabilizer: Rigorous Performance Evaluation

Emscripten: An LLVM-to-JavaScript Compiler

Hound memory leak detector

measure entropy of memory allocators

An Excel formula parser

Scalene web GUI

A simple socket wrapper for C++.

parallel Python

Rehearsal: A Configuration Verification Tool for Puppet

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Smash compressing allocator project

The Hoard Memory Allocator: A Fast, Scalable, and Memory-efficient Malloc for Linux, Windows, Mac, and Solaris.

Implementation from "A Locality-Improving Dynamic Memory Allocator", Feng and Berger, MSP 2005

Support code for Programming Languages (COMPSCI631)

Archipelago memory allocator

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Tortoise: Interactive System Configuration Repair

Utilities for our LLM projects (CWhy, ChatDBG, ...).

TransparentFS code, paper, and slides

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Deterministic Thread Scheduler - pthread interposition for reproducible multi-threaded execution

Demo of the Doppio Runtime System.

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HeapToss is an LLVM compiler pass that moves stack variables that may escape their declaring function's context into the heap.

Homebrew tap for Scalene (emeryberger/scalene)

Description of our Google Summer of Code projects for 2015

DieHard: An error-resistant memory allocator for Windows, Linux, and Mac OS X

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home page

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Scripts that produce a version of the Java Class Library and Java Home in a way that is compatible with DoppioJVM.

SurveyMan programming language.

Google Summer of Code 2013

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A Micro-benchmarking Framework for Python Type Inference Tools

A fast Ramer-Douglas-Peucker algorithm implementation.

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Benchmarks comparing Scalene with other commonly-used profilers

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Transparent memory management

probabilistic race tolerance

Generates MTurk typo jobs

Heap Layers: An Extensible Memory Allocation Infrastructure

A fast and efficient type assistant for Python, including tensor shape inference

Redis fork with memory compressor (Smash) compatibility patches: cached object metadata + idle mode

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Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D engine that enables developers and content creators to build AAA games, cinema-quality 3D worlds, and high-fidelity simulations without any fees or commercial obligations.

C++11 ELF/DWARF parser

[ICML2025] Evaluating LLM Type Inference for Untyped Python Repositories

Scalene UI

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MutAP: A prompt_based learning technique to automatically generate test cases with Large Language Model

Homebrew tap to install SQLwrite

The low-level, core functionality of boto3 and the AWS CLI.

The Python programming language

JCoz -- The first Java causal profiler

COMPSCI 630 Spring 2023 Ouroboros Python Optimizer Project

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Static analysis tool to slice python programs

Python/Numpy implementation of the Ramer-Douglas-Peucker algorithm

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Basic Development Environment - a set of foundational C++ libraries used at Bloomberg.

Repo for doing all sorts of go / wasm benchmarking

snakes on a prof

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fall-18-project-1-multi-threaded-word-count-sidewinder182 created by GitHub Classroom

Python Bindings of AutoMan

presentations

A web app for ranking computer science departments according to their research output in selective venues.

Repo for notes and stuff related to Reconsidering Custom Allocation 2

Experimental naive Bayes classifier to identify programming languages

Systems for data science class

plasma seminar repo

Spatio-structural analysis plugin for Microsoft Excel

Systems for Data Science repo

Client-side logic for presenting a CheckCell error-ranking question on Mechanical Turk through JavaScript.

Redline OS (OSDI 2008)

Logos, etc. for PLASMA

Repository for AutoMan IntelliJ Debugger (AID). AID is a plugin for IntelliJ IDEA, written in Scala mostly. It is designed to make developing AutoMan tasks easier.

Program metric correlates of human affect

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