v3.4.2

HelixDB/helix-dbv3.4.2Oct 2, 2026by github-actions[bot]

Upgrading?

AI Summary

This release focuses on performance optimizations and infrastructure improvements, including concurrent read handling, caching strategies, and index usage enhancements. It also includes documentation tracking and dependency updates.

Key Highlights

  • Performance improvements for DB reads with overlapping cold block fetches and concurrent expansion
  • Local disk cache layer added in front of S3 storage
  • Performance optimizations for source filters and counts using indexes
  • Updated CLI to version 3.4.2 and Docker to v0.0.9

New Features

  • Local disk cache in front of S3 storage
  • Documentation tracking with Databuddy

Full Release Notes

## What's Changed
* chore(deps): bump the npm_and_yarn group across 2 directories with 4 updates by @dependabot[bot] in https://github.com/HelixDB/helix-db/pull/1152
* feat(docs): track docs visits with Databuddy by @xav-db in https://github.com/HelixDB/helix-db/pull/1153
* perf(db): keep loaded index sets across ForEach frames and unrelated writes by @xav-db in https://github.com/HelixDB/helix-db/pull/1154
* perf(planner,db): source filters and counts always use indexes by @xav-db in https://github.com/HelixDB/helix-db/pull/1155
* feat(server): always put a local disk cache in front of S3 storage by @xav-db in https://github.com/HelixDB/helix-db/pull/1157
* perf(db): overlap cold block fetches in batch point reads by @xav-db in https://github.com/HelixDB/helix-db/pull/1158
* perf(db): read expansion parents concurrently and prefetch projection records by @xav-db in https://github.com/HelixDB/helix-db/pull/1159
* perf(db): warm vector search rows into the object-store cache after open by @xav-db in https://github.com/HelixDB/helix-db/pull/1160
* ci: refresh DB production coverage after the cold-read PRs by @xav-db in https://github.com/HelixDB/helix-db/pull/1162
* Release CLI 3.4.2 and Docker v0.0.9 by @xav-db in https://github.com/HelixDB/helix-db/pull/1161


**Full Changelog**: https://github.com/HelixDB/helix-db/compare/v3.4.1...v3.4.2

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