---
title: "What's new in ClickStack - March 2026"
description: "ClickStack announced several observability updates in its March 2026 release to improve root cause analysis, dashboard organization, and local development. The Event Deltas tool now displays baseline span distributions immediately, uses deterministic cityHash64 sampling for trace heatmaps, and applies proportional comparison scoring to accurately evaluate attributes across uneven sample sizes. Furthermore, users can directly include or exclude values from attribute comparison bars to streamline query creation during incident investigations. Dashboard capabilities expanded with a curated OpenTelemetry template gallery, multi-value filtering with optional lookup WHERE clauses, and broadened metric display units. Finally, local mode introduces browser localStorage persistence through createEntityStore, allowing developers to save dashboards and favorites without a running backend API."
---

# What's new in ClickStack - March 2026

[Clickhouse](https://yomu.fyi/company/clickhouse) · The ClickStack Team · Apr 14, 2026

**Type:** Announcement

## Summary

ClickStack announced several observability updates in its March 2026 release to improve root cause analysis, dashboard organization, and local development. The Event Deltas tool now displays baseline span distributions immediately, uses deterministic cityHash64 sampling for trace heatmaps, and applies proportional comparison scoring to accurately evaluate attributes across uneven sample sizes. Furthermore, users can directly include or exclude values from attribute comparison bars to streamline query creation during incident investigations. Dashboard capabilities expanded with a curated OpenTelemetry template gallery, multi-value filtering with optional lookup WHERE clauses, and broadened metric display units. Finally, local mode introduces browser localStorage persistence through createEntityStore, allowing developers to save dashboards and favorites without a running backend API.

## Context

ClickStack users required faster root cause analysis, consistent trace sampling, flexible dashboard filtering, and local persistence without backend APIs. Previous implementations suffered from misleading raw delta rankings across unequal sample sizes, non-deterministic heatmap sampling, and lack of session persistence in local mode.

## Approach / What changed

The release introduces proportional comparison scoring and cityHash64 trace sampling in Event Deltas, alongside interactive action popovers for span filtering. ClickStack also added OpenTelemetry template galleries, multi-value dashboard filters with scoped WHERE clauses, localStorage persistence via createEntityStore in local mode, and expanded display units.

## Takeaways

- Event Deltas transitioned from sorting by raw delta counts to proportional comparison scoring, which normalises group percentages to 100% to prevent high-volume attributes from skewing root-cause rankings.
- Trace heatmap sampling switched from ORDER BY rand() to ORDER BY cityHash64(SpanId), making span sampling deterministic and repeatable across repeated renders.
- Local mode now uses a createEntityStore abstraction backed by browser localStorage, enabling persistent dashboards, saved searches, and user favorites without requiring a backend API.

**Tags:** [Developer Experience](https://yomu.fyi/topic/developer-experience), [Monitoring](https://yomu.fyi/topic/monitoring), [Observability](https://yomu.fyi/topic/observability), [Open Source](https://yomu.fyi/topic/open-source)

- Source: [Clickhouse](https://clickhouse.com/blog/whats-new-in-clickstack-march-2026)
- Source URL: https://clickhouse.com/blog/whats-new-in-clickstack-march-2026
- Ingested by Yomu: 2026-08-28T01:24:13.439Z

[Read original post](https://clickhouse.com/blog/whats-new-in-clickstack-march-2026)