**What type of PR is this?** Other **What does this PR do? Why is it needed?** Before this PR, all `.sszs` files containing the data column sidecars were read an process sequentially, taking some time. After this PR, every `.sszs` files of a given epoch (so, up to 32 files with the current `SLOT_PER_EPOCHS` value) are processed in parallel. **Which issues(s) does this PR fix?** - https://github.com/OffchainLabs/prysm/issues/16204 Tested on - [Netcup VPS 4000 G11](https://www.netcup.com/en/server/vps). **Before this PR (3 trials)**: ``` [2026-01-02 08:55:12.71] INFO filesystem: Data column filesystem cache warm-up complete elapsed=1m22.894007534s [2026-01-02 12:59:33.62] INFO filesystem: Data column filesystem cache warm-up complete elapsed=42.346732863s [2026-01-02 13:03:13.65] INFO filesystem: Data column filesystem cache warm-up complete elapsed=56.143565960s ``` **After this PR (3 trials)**: ``` [2026-01-02 12:50:07.53] INFO filesystem: Data column filesystem cache warm-up complete elapsed=2.019424193s [2026-01-02 12:52:01.34] INFO filesystem: Data column filesystem cache warm-up complete elapsed=1.960671225s [2026-01-02 12:53:34.66] INFO filesystem: Data column filesystem cache warm-up complete elapsed=2.549555363s ``` **Acknowledgements** - [x] I have read [CONTRIBUTING.md](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md). - [x] I have included a uniquely named [changelog fragment file](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md#maintaining-changelogmd). - [x] I have added a description with sufficient context for reviewers to understand this PR. - [x] I have tested that my changes work as expected and I added a testing plan to the PR description (if applicable).
Prysm: An Ethereum Consensus Implementation Written in Go
📖 Overview
This is the core repository for Prysm, a Golang implementation of the Ethereum Consensus specification, developed by Offchain Labs.
See the Changelog for details of the latest releases and upcoming breaking changes.
🚀 Getting Started
A detailed set of installation and usage instructions as well as breakdowns of each individual component are available in the official documentation portal.
💬 Need help? Join our Discord Community for support.
🏆 Staking on Mainnet
To participate in staking, you can join the official Ethereum launchpad. The launchpad is the only recommended way to become a validator on mainnet.
🔍 Explore validator rewards/penalties:
🤝 Contributing
🔥 Branches
Prysm maintains two permanent branches:
master- This points to the latest stable release. It is ideal for most users.develop- This is used for development and contains the latest PRs. Developers should base their PRs on this branch.
🛠 Contribution Guide
Want to get involved? Check out our Contribution Guide to learn more!
📜 License
This project is licensed under the GNU General Public License v3.0.
