v5.5.1

Signed-off-by: Andrew Stein <steinlink@gmail.com>

Author: texodus

CHANGELOG.md

@@ -1,3 +1,15 @@
+# [v5.5.1](https://github.com/perspective-dev/perspective/releases/tag/v5.5.1)
+
+_18 September 2026_ ([Full changelog](https://github.com/finos/perspective/compare/v5.5.0...v5.5.1))
+
+Features
+
+- Add `zstd` support to `View::to_arrow` [#3232](https://github.com/finos/perspective/pull/3232)
+
+Fixes
+
+- Fix `null` groups and column group formatting in `viewer-datagrid` [#3234](https://github.com/finos/perspective/pull/3234)
+
 # [v5.5.0](https://github.com/perspective-dev/perspective/releases/tag/v5.5.0)
 
 _15 September 2026_ ([Full changelog](https://github.com/finos/perspective/compare/v5.4.0...v5.5.0))
@@ -8,7 +20,7 @@ _15 September 2026_ ([Full changelog](https://github.com/finos/perspective/compa
 
 Features
 
-- `getView({mode})` API and columns_config cleanup [#3231](https://github.com/finos/perspective/pull/3231)
+- `getView({mode})` API and `columns_config` cleanup [#3231](https://github.com/finos/perspective/pull/3231)
 
 # [v5.4.0](https://github.com/perspective-dev/perspective/releases/tag/v5.4.0)
 

Cargo.lock

@@ -1,6 +1,6 @@
 {
     "name": "@perspective-dev/docs",
-    "version": "5.5.0",
+    "version": "5.5.1",
     "private": true,
     "type": "module",
     "scripts": {

docs/package.json

@@ -1,7 +1,7 @@
 {
     "name": "cdn",
     "private": true,
-    "version": "5.5.0",
+    "version": "5.5.1",
     "description": "A bundler-free example app which loads `@perspective-dev/viewer` from `<script type=\"module\">` tags.",
     "type": "module",
     "scripts": {

examples/cdn/package.json

@@ -1,7 +1,7 @@
 {
     "name": "esbuild-clickhouse-virtual",
     "private": true,
-    "version": "5.5.0",
+    "version": "5.5.1",
     "type": "module",
     "description": "Example of a custom VirtualServer for ClickHouse running in a Web Worker",
     "scripts": {

examples/esbuild-clickhouse-virtual/package.json

@@ -1,7 +1,7 @@
 {
     "name": "esbuild-duckdb-virtual",
     "private": true,
-    "version": "5.5.0",
+    "version": "5.5.1",
     "type": "module",
     "description": "Example of a custom VirtualServer running in a Web Worker",
     "scripts": {

examples/esbuild-duckdb-virtual/package.json

@@ -1,7 +1,7 @@
 {
     "name": "esbuild-example",
     "private": true,
-    "version": "5.5.0",
+    "version": "5.5.1",
     "description": "An esbuild example app built using `@perspective-dev/viewer`.",
     "scripts": {
         "build": "node build.js",

examples/esbuild-example/package.json

@@ -1,7 +1,7 @@
 {
     "name": "esbuild-remote",
     "private": true,
-    "version": "5.5.0",
+    "version": "5.5.1",
     "description": "An example of 2 Perspectives, one client and one server, streaming via Apache Arrow.",
     "scripts": {
         "start": "node build.js && node server/index.mjs"

examples/esbuild-remote/package.json

@@ -1,7 +1,7 @@
 {
     "name": "python-aiohttp",
     "private": true,
-    "version": "5.5.0",
+    "version": "5.5.1",
     "description": "An example of editing a `perspective-python` server from the browser.",
     "scripts": {
         "start": "PYTHONPATH=../../python/perspective python3 server.py"

examples/python-aiohttp/package.json

@@ -1,7 +1,7 @@
 {
     "name": "python-clickhouse-virtual",
     "private": true,
-    "version": "5.5.0",
+    "version": "5.5.1",
     "description": "An example of streaming a ClickHouse-backed `perspective-python` server to the browser.",
     "scripts": {
         "start": "PYTHONPATH=../../python/perspective python3 server.py"