The client runs babel-plugin-react-compiler in annotation mode, so 'use memo' is the opt in and the codebase already uses it in eighteen places. The teleprompter was the odd one out, hand rolling what the compiler does better. Teleprompter and ScriptBlock now carry the directive, which replaces two useMemo calls, four useCallback calls and a memo wrapper. Verified against the compiler rather than assumed: the two files emit 46 and 15 memo cache slots respectively, finer grained than the six the hand written version had. The scroll engine and the key handler deliberately keep no directive. They derive nothing and render nothing, they drive an animation frame loop through refs, so there is nothing to memoise and no reason to put them through the compiler. Also fixes a hazard the conversion surfaced. The follow effect listed the blocks array in its dependencies, but memoisation is a performance hint React is free to discard, under the compiler as much as by hand. A rebuilt but otherwise identical list would re-fire the jump to the loaded event and yank the script back mid read. It now watches whether the loaded event has a block at all, which is the condition it actually cared about and does not depend on identity. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Cb8RVPNQ2ETPJxdy4b8CHf
Download the latest release
- Download for Windows
- Download for macOS (Apple Silicon)
- Download for macOS (Intel)
- Download AppImage for Linux (Intel / AMD 64-bit)
- Download AppImage for Linux (ARM 64-bit, Raspberry Pi 4+)
- Download AppImage for Linux (ARM 32-bit, older Raspberry Pi)
... or
- Get from Docker hub
- Install from NPM
- Install from Homebrew
Need help?
We do our best to have most topics covered by the documentation. However, if your question is not covered, you are welcome to fill in a bug report in an issue, ask a question in GitHub discussions or hop in the discord server for a chat.
Using Ontime?
Let us know! Ontime improves from the collaboration with its users. We would like to understand how you use Ontime and appreciate your feedback.
Ontime
Ontime is a browser-based application that manages event rundowns, scheduling, and cueing.
With Ontime, you can plan, track your schedule, manage automation and cross-department show information all in one place.
Ontime is made by entertainment and broadcast engineers and used by
- Conference organisers
- Touring shows and receiving venues
- Broadcasters and streamers
- Theatres and opera houses
- Houses of worship
Main features
- Multiplatform: Available as a Cloud service and for Windows, macOS, Linux, or self-hosted via Docker.
- In any device: Ontime is available to any device with a browser, eg: tablets, mobile phones, laptops, signage, media servers...
- Team Collaboration: Dedicated views for directors, operators, backstage, and signage.
- Real-Time Updates: Manage and communicate runtime delays effortlessly.
- Automatable: Ontime can be fully or partially controlled by an operator, or run standalone with the system clock
- Flexible Integrations: Use one of the APIs provided (OSC, HTTP, Websocket) or the available Companion module to integrate into your workflow (vMix, disguise, Qlab, OBS)
... and a lot more ...
For live environments
Ontime is designed for use in live environments.
This guides the application into being flexible and efficiently integrating into different workflows.
For teams
All information added in Ontime is shared with the production team and other software / hardware in your workflow.
Ontime also improves team collaboration with dedicated views for cuesheets and operators, and for public and production
signage.
Simple infrastructure
All the data is distributed over the network, making its distribution and infrastructure flexible and cheap.
With the availability of the docker image, you can also leverage IT infrastructure to make Ontime available online for
your team and clients.
Ontime is made by video engineers and entertainment technicians.
Using Ontime
Getting started
The easiest way to start with Ontime is by leveraging our Cloud service.
This will give you immediate access to running instances of Ontime which are available to share with anyone with an internet connection.
Alternatively, you can run Ontime locally for free by downloading the latest release for your platform or using the docker image, available at Docker Hub
Once installed and running, any device that shares the same network as Ontime will have access to Ontime.
More information is available in our docs
Continued development
Ontime is under active development. We continue adding and improving features in collaboration with users.
Have an idea? Reach out via email or open an issue
Issues
We use Github's issue tracking for bug reporting and feature requests.
Found a bug? Open an issue.
Contributing
Looking to contribute? All types of help are appreciated, from coding to testing and feature specification.
If you are a developer and would like to contribute with code, please open an issue to discuss before opening a Pull Request.
Information about the project setup can be found in the development documentation
Links
License
This project is licensed under the terms of the GNU GPL v3
Sponsor
You can help the development of this project or say thank you with a one time donation.
See the terms of donations.


