install

Additional install commands

macOS

Homebrewverified · 100%

brew install jhiccup

local Homebrew formula metadata

Linux

Nixverified · 92%

nix profile install nixpkgs#jhiccup

nixpkgs package indexes · pkgs/by-name/jh/jhiccup/package.nix · source: api.github.com

overview

Package summary

Measure pauses and stalls of an app's Java runtime platform

Project links

Commands and aliases

jHiccup
jHiccupLogProcessor
jHiccupPlotter

history

Project history and usage

jHiccup is Gil Tene's Java latency-observation tool for measuring platform pauses, including JVM stalls and operating-system or hardware scheduling noise. It records the delays a Java application experiences when it is not continuously runnable.

Project history

The public repository was created in 2013 and the README identifies the author as Gil Tene of Azul Systems. The first tagged line visible in the repository is jHiccup 1.3.5 from November 2013, and the 2.0.x line reached 2.0.10 in 2018.

The tool reflects Azul's long-running focus on Java pause behavior. It can run as a Java agent, attach to an already running process, or wrap an existing Java command, making it practical for production-like measurements without rewriting the application under test.

Adoption history

jHiccup spread among JVM performance engineers because it measures latency symptoms from the application's point of view rather than only reporting garbage-collector events. Azul's product page and Prime documentation keep it available as an open-source component and describe its use in evaluating JVM runtime pauses.

Its package-manager footprint is narrower than general-purpose CLIs, but Homebrew and Nix packaging make sense: the audience is specialized, and the tool is most useful when an engineer can install it quickly on a machine under test.

How it is used

jHiccup starts a thread that sleeps at a small interval and records wake-up delays beyond the expected sleep time. It writes histogram logs that can be processed by jHiccupLogProcessor or viewed with HdrHistogram-based tools.

Common use cases include comparing JVM pause behavior, separating application-visible stalls from operating-system noise, attaching a control process for baseline idle hiccups, and producing charts for latency investigations.

Why package nerds care

For package nerds, jHiccup is a good example of a tiny diagnostic package with a highly specific audience. It packages an expert performance concept into command-line tools, a Java agent, and log-processing utilities rather than a full monitoring platform.

It is also historically tied to HdrHistogram and the Java low-latency community, where percentile distributions and pause visibility matter more than average throughput.

Timeline

2013: The public jHiccup repository was created and jHiccup 1.3.5 was tagged.
2018: jHiccup 2.0.10 was tagged.
2021: The README was updated with a Works with OpenJDK badge, reflecting continued compatibility signaling.

Related projects

HdrHistogram is the histogram format and library used by jHiccup logs.
HistogramLogAnalyzer and HdrHistogramVisualizer are named by the README as tools for analyzing or plotting histogram logs.
Azul Prime documentation uses jHiccup as part of JVM pause evaluation workflows.

Sources

security posture

Risk level: yellow

generalized runtime or code generation signal.

Risk classifier

yellow risk · medium confidence · runtime

Why

generalized runtime or code generation signal

Signals

text:runtime

Install behavior

No Homebrew post-install hook is recorded in formula metadata.
Homebrew bottle metadata is available for 1 platform targets.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure
`jHiccup`	cli	global executable
`jHiccupLogProcessor`	cli	global executable
`jHiccupPlotter`	cli	global executable

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-07-08

manager version2.0.10

manager updated2026-07-04

local dataok

upstreamnot checked

latest detectednot detected

https://www.azul.com/products/components/jhiccup/

infoRelease/tag comparison is only available for GitHub repositories.https://www.azul.com/products/components/jhiccup/none confidence

install metadata

Package metadata

Package key	brew:jhiccup
Version	2.0.10
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/jhiccup
Homepage	https://www.azul.com/products/components/jhiccup/
Repository	https://github.com/giltene/jHiccup
Upstream docs	https://docs.azul.com/prime/jHiccup
License	CC0-1.0 OR BSD-2-Clause
Source archive	https://www.azul.com/wp-content/uploads/jHiccup-2.0.10-dist.zip
Last updated	2026-07-04T13:13:40+09:00
Pulse	updated
Bottle	available (on all)
Homebrew post-install	not defined
Service	none declared

registry facts

Source database details

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	jhiccup
Version Scheme	0
Revision	0
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	stable

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Nix95%

jhiccup

nix profile install nixpkgs#jhiccup

normalized package name match
Matched by: Jhiccup

nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/jh/jhiccup/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/jhiccup.yml

Used sources

Geiger risk classifier
Nucleus package database
av.db category and tag curation
cross-ecosystem install command graph
curated package history
external package-manager database matches
package relationship graph
package version freshness
package-page enrichment

Install jhiccup with Homebrew, Nix