docs: add v0.1.3 benchmark release notes

Author: Zhang-JiahangH

CHANGELOG.md

@@ -4,6 +4,34 @@ All notable changes to this project will be documented in this file.
 
 The format is based on Keep a Changelog, and this project follows Semantic Versioning.
 
+## [0.1.3] - 2026-04-07
+
+### Added
+
+- Added a runnable benchmark suite under `apps/benchmark` to compare:
+  - `react-virtualized-diff`
+  - `react-diff-viewer`
+  - `react-diff-viewer-continued`
+  - `react-diff-view`
+- Added benchmark dimensions for `1k / 10k / 50k / 100k` lines and collected metrics:
+  - FPS
+  - initial render time
+  - memory usage (`performance.memory.usedJSHeapSize` in Chromium)
+- Added root benchmark command: `pnpm benchmark`.
+- Added automated benchmark runner script: `scripts/run-benchmark.mjs`.
+
+### Improved
+
+- Auto-installs Playwright Chromium on first benchmark run when browser binaries are missing.
+- Uses per-case timeout handling (`60000ms`) and records timeout cases in result outputs instead of failing the whole benchmark run.
+- Cleanly stops benchmark dev server after execution to avoid noisy exit errors.
+
+### Output
+
+- Benchmark results are generated to:
+  - `benchmark-results/results.json`
+  - `benchmark-results/results.md`
+
 ## [0.1.1] - 2026-04-06
 
 ### Added