clj-easy/graalvm-clojure

This project contains a set of "hello world" projects to verify which Clojure libraries do actually compile and produce native images under GraalVM.

Clojure

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126 commits

updated Sep 27, 2026

See the code

README

Clojure meets GraalVM

This project contains a set of "hello world" projects to verify which Clojure libraries do actually compile and produce native images under GraalVM.

Here the instructions on how to build your own Clojure projects with GraalVM.

Here the list of libraries tested:

Status	Library	Description	Remarks
✅	Clojure core	Clojure core
✅	clojure spec	Clojure Spec
✅	clojure/tools.logging	Logging library
✅	clojure/tools.logging+log4j	Logging library
✅	aleph	Web server
✅	amazonica+s3	Cloud API wrapper library
✅	asami	Asami DB
✅	aws-api+s3	Cognitect AWS client library
✅	buffy	Buffy, The Byte Buffer Slayer
✅	carmine	Redis client and message queue for Clojure
✅	cheshire	JSON parser/writer
✅	cli4clj	Interactive Command Line Interfaces (CLIs) for Clojure Applications
✅	cljfmt	Source Formatter
✅	clj-http-lite	Web client
❌	clj-sophia	A fast RAM-Disk hybrid storage	Runtime error/JNA
✅	clj-uuid	RFC4122 Unique Identifiers for Clojure	No objects in namespaced uuids
✅	clara-rules	A Clojure forward-chaining rules engine	Using AOT compiled session
✅	clostache	{{ mustache }} for Clojure
✅	component	Managing lifecycle and dependencies of software
✅	cprop	Configuration/property management
✅	datascript	Immutable database and Datalog query engine
⚠️	fastmath	Fast and primitive math and stats library	See README
✅	fire	A lightweight clojure client for Firebase based using the REST API.
✅	hiccup	Fast library for rendering HTML in Clojure
✅	http-kit	Web server and server
✅	integrant	Alternative to mount, component etc.
✅	lacinia	A GraphQL server implementation in pure Clojure
✅	loom	A Graph manipulation and computation library.
❌	monger	An idiomatic Clojure MongoDB driver with sane defaults
✅	μ/log	Event logging system
✅	next.jdbc + honeysql	Database driver and SQL-in-Clojure
✅	nippy	Clojure serialization/deserialization library
✅	pp-grid	A text-formatting library
✅	ring/jetty	Web server
✅	RoaringBitmap	Bitset library
✅	safely	Circuit breaker
✅	secure-random	`SecureRandom` initialization
✅	selmer	A fast, Django inspired template system for Clojure.
✅	system	Layer on top of components
✅	tech.ml.dataset	A Clojure high performance data processing system
✅	timbre	Pure Clojure/Script logging library
✅	pedestal	Pedestal is a sturdy and reliable base for services and APIs.	requires reflect-config.json
✅	claypoole	Claypoole: Threadpool tools for Clojure
✅	upit	Very very simple library to initialise your app stack.
✅	zetasketch	Sketch data structures like HLL	requires reflect-config.json
✅	pg2-core	A Fast PostgreSQL Driver For Clojure

More libraries to come (PRs are welcome).

Interesting GraalVM documentation to build native-images:

Understand Class Initialization in Native Image
Native Image Build Configuration
URL Protocols in Native Image for http and https
JCA Security Services in Native Image

How to contribute

If you wish to add a library and contribute with a PR please follow these steps:

Fork the project
use the sample-project as a template. cp -r sample-project my-library
add the library to the project.clj and the native-image parameters used
amend the my-library/src/simple/main.clj to use the library
amend the my-library/README.md with the info you discovered.
Make a PR with your findings and "Thank you" in advance.

License

Distributed under the Apache License v 2.0 (http://www.apache.org/licenses/LICENSE-2.0)

Significant stargazers

Lee Read

55 followers · starred Apr 2022

Randy Stauner

115 followers · starred Jan 2021

ad hoc

202 followers · starred Jan 2021

José Luis Lafuente

47 followers · starred Feb 2020

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