# emeryberger/Hoard

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

Repository: https://github.com/emeryberger/Hoard
Canonical: https://ross.abutalabs.com/products/hoard
Homepage: http://www.hoard.org
Language: C++
License: Apache-2.0
License Family: permissive
Topics: memory-allocation, memory-manager, malloc
Last push: 2026-07-19T14:22:15+00:00

## Health v2 (maintenance only)
Score: 73/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 93, release rhythm 31, longevity 100
- inputs: {"age_days": 5264, "days_push": 45, "days_rel": 246, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1249, forks 138 (observed 2026-08-28T04:04:07.957885+00:00)

## What it is
Hoard is a fast, scalable, and memory-efficient drop-in replacement for malloc that works on Linux, Mac OS X, and Windows. It dramatically improves application performance, especially for multithreaded programs on multiprocessor and multicore systems, without requiring source code changes.

## Use cases
- speed up multithreaded applications on multicore CPUs
- replace the system malloc without changing source code
- reduce heap contention and allocator serialization in parallel programs
- bound memory blowup in multiprocessor workloads
- improve performance of C and C++ servers and scientific applications

## When to choose
- your multithreaded application scales poorly due to heap contention
- you need a drop-in allocator replacement via linking or an environment variable
- you run on Linux, Mac OS X, or Windows and want faster allocation than the built-in allocator
- you need provably bounded memory blowup and low synchronization costs

## When to avoid
- your application is single-threaded and allocation is not a bottleneck
- you need platform support beyond Linux, Mac OS X, and Windows
- you require a modern allocator with extensive tunable configuration options
- you depend on allocator-specific features like heap profiling or sanitization integration

## Facets
- artifact type: library
- maturity: stable
- function: concurrency
- domain: developer-tools, performance, operating-systems
- platform: windows, cpp, c
- tags: malloc, memory-allocator, drop-in-replacement, multithreading, scalability, memory-allocation, performance, linux, macos

## Member repositories
- emeryberger/Hoard (main) score 73

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:07.957885+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T05:07:47.351096+00:00, confidence not recorded.
  - readme: https://github.com/emeryberger/Hoard (fetched 2026-08-28T04:04:07.957885+00:00, sha 1b3b0452d044)
  - homepage: http://www.hoard.org (fetched 2026-08-29T12:18:42.124601+00:00, sha db49da4c40eb)
- Data as of 2026-08-30T08:39:29.467469+00:00.