Bump version to 0.3.6.1

Author: jeffhuen

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.3.6.1] - 2026-02-03
+
+### Fixed
+
+- **Disabled `memory_tracking` by default** — the `memory_tracking` Cargo feature was accidentally left enabled in the 0.3.6 release. This feature wraps every allocation/deallocation with atomic counter updates, adding measurable overhead. It is now disabled by default as intended. Enable explicitly for profiling: `default = ["mimalloc", "memory_tracking"]` in `native/rustycsv/Cargo.toml`.
+
 ## [0.3.6] - 2026-02-02
 
 Decoding and encoding overhaul. All batch decode strategies now use boundary-based sub-binaries (zero-copy for most fields). Encoding writes a single flat binary instead of an iodata list. **3.5–19x faster** decoding, **2.5–31x faster** encoding vs pure Elixir, with **5–14x less memory** for decoding.

mix.exs

@@ -1,7 +1,7 @@
 defmodule RustyCSV.MixProject do
   use Mix.Project
 
-  @version "0.3.6"
+  @version "0.3.6.1"
   @source_url "https://github.com/jeffhuen/rustycsv"
 
   def project do

native/rustycsv/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rustycsv"
-version = "0.3.6"
+version = "0.3.6.1"
 authors = ["Jeff Huen"]
 edition = "2021"
 
@@ -15,7 +15,7 @@ rayon = "1.10"    # Data parallelism for parallel parsing
 mimalloc = { version = "0.1", default-features = false, optional = true }
 
 [features]
-default = ["mimalloc", "memory_tracking"]
+default = ["mimalloc"]
 mimalloc = ["dep:mimalloc"]
 # Enable memory tracking (adds overhead - use only for profiling)
 memory_tracking = []