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v1.6.6

Gentleman-Programming/engramv1.6.6May 13, 2026by chonk-lain

Upgrading?

What changed from v1.15.11 → v1.6.6?What's new in v1.15.12 after v1.6.6?

Release notes summary

Chonkie v1.6.6 focuses on a CodeChunker update delivering significant performance improvements, with benchmarks showing reduced latency across percentiles and a 44.5% reduction in index time. Search quality (NDCG@10) remained essentially unchanged while p50 latency dropped 14.3% and p99 latency dropped 17.4%.

Key Highlights

  • CodeChunker updated with substantial performance gains
  • Index time reduced by 44.5% (5,138 ms to 2,853 ms)
  • p50 latency improved 14.3%, p99 latency improved 17.4%
  • Search quality maintained with a slight NDCG@10 gain of 0.2%
  • Dependency updates including urllib3, langchain-core, mako, and authlib

New Features

  • Updated CodeChunker implementation
  • Major performance and latency improvements
  • Faster indexing pipeline

Full Release Notes

## Highlight

 🔥  CodeChunker update and huge performance speedup.
bechmarks below using [semble](https://github.com/MinishLab/semble) as a reference:

| Metric | Baseline | Semble (uring the current version) | Delta | % Change |
|--------|----------|---------|-------|----------|
| **NDCG@10** (search quality) | 0.854 | 0.856 | +0.002 | **+0.2%** |
| **p50 latency** | 7.19 ms | 6.16 ms | -1.03 ms | **-14.3%** |
| **p90 latency** | 22.15 ms | 18.57 ms | -3.57 ms | **-16.1%** |
| **p95 latency** | 25.12 ms | 20.60 ms | -4.51 ms | **-18.0%** |
| **p99 latency** | 28.69 ms | 23.70 ms | -4.99 ms | **-17.4%** |
| **Index time** | 5,138 ms | 2,853 ms | -2,285 ms | **-44.5%** |

## What's Changed
* update code chunker by @chonk-lain in https://github.com/chonkie-inc/chonkie/pull/587


## Dependencies
* chore(deps): bump urllib3 from 2.6.3 to 2.7.0 by @dependabot[bot] in https://github.com/chonkie-inc/chonkie/pull/584
* chore(deps): bump langchain-core from 1.2.31 to 1.3.3 by @dependabot[bot] in https://github.com/chonkie-inc/chonkie/pull/581
* chore(deps-dev): update turbopuffer requirement from ~=1.0 to >=1,<3 by @dependabot[bot] in https://github.com/chonkie-inc/chonkie/pull/585
* chore(deps): bump mako from 1.3.11 to 1.3.12 by @dependabot[bot] in https://github.com/chonkie-inc/chonkie/pull/579
* chore(deps): bump authlib from 1.6.11 to 1.6.12 by @dependabot[bot] in https://github.com/chonkie-inc/chonkie/pull/588

**Full Changelog**: https://github.com/chonkie-inc/chonkie/compare/v1.6.5...v1.6.6

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