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oxc-guard 0389c4010e release(crates): oxc v0.146.0 (#25912 )

### 🚀 Features

- 83cb516 minifier: Improve negation of expressions in boolean context (#25755) (Armano)

### 🐛 Bug Fixes

- 134fb22 isolated-declarations: Preserve unresolved parameter types (#25909) (Dunqing)
- 526c2b3 codegen: Remove deprecated test APIs (#25889) (camc314)
- 344a9b2 codegen: Align enum template sourcemaps (#25872) (camc314)

### ⚡ Performance

- 5ef0c93 minifier: Unwrap all unary exprs without creating dummy expressions (#25891) (Armano)
- 8783524 packages/codegen: Remove loop from `growMappingBuffer` (#25886) (overlookmotel)
- b6b14c0 packages/codegen: Remove redundant branch (#25885) (overlookmotel)
- be6adf0 packages/sourcemap: Make `location` passed to `recordSourceMapping` always a number (#25884) (overlookmotel)
- f720f15 packages/codegen: Take named-mapping only code off hot path in `recordSourceMapping` (#25883) (overlookmotel)
- a734af5 packages/codegen: Remove redundant setting of `last` in `printImportAttributes` and `printIf` (#25882) (overlookmotel)
- c6e44c6 packages/codegen: Combine 2 writes in `printJSXElement` (#25881) (overlookmotel)
- 8801662 packages/codegen: Remove redundant mapping from `printParams` (#25880) (overlookmotel)

### 📚 Documentation

- 5ad330e packages/codegen: Reformat comments (#25876) (overlookmotel)

2026-08-19 08:29:51 +00:00

src

test(allocator): add more tests for bump pointer calculation (#25365 )

2026-08-09 13:33:05 +00:00

tests

test(allocator, data_structures, str): use implements! macro in tests (#24722 )

2026-07-20 12:36:14 +00:00

Cargo.toml

release(crates): oxc v0.146.0 (#25912 )

2026-08-19 08:29:51 +00:00

CHANGELOG.md

release(crates): oxc v0.144.0 (#25474 )

2026-08-10 09:57:10 +00:00

README.md

refactor(allocator/pool)!: remove disable_fixed_size Cargo feature (#13625 )

2025-09-10 04:14:29 +00:00

README.md

Oxc Allocator

A high-performance memory allocator using bump-based arena allocation for fast AST node creation.

Overview

Oxc uses a bump-based memory arena for faster AST allocations. This crate provides an [Allocator] that manages memory efficiently by allocating objects in a single contiguous memory region, avoiding the overhead of individual heap allocations.

Key Features

Bump allocation: Fast allocation by simply incrementing a pointer
Arena-based memory management: All allocations live for the same lifetime
Zero-copy data structures: Efficient Box, Vec, String, and HashMap implementations
Optimal for AST operations: Perfect for parse-transform-emit workflows

Architecture

The allocator is designed specifically for AST processing workflows where:

A large number of nodes are allocated during parsing
All nodes have the same lifetime (tied to the AST)
Memory is released all at once when the AST is dropped

This approach is significantly faster than using the system allocator for AST operations.

Features

serialize - Enables serialization support for Box and Vec with serde and oxc_estree.
pool - Enables AllocatorPool.
bitset - Enables BitSet.
from_raw_parts - Adds unsafe from_raw_parts method (not recommended for general use).
fixed_size - Makes AllocatorPool create large fixed-size allocators, instead of flexibly-sized ones. Only supported on 64-bit little-endian platforms at present. Usage of this feature is not advisable, and it will be removed as soon as we're able to.
track_allocations - Count allocations and reallocations. For internal use only. The APIs provided by this feature are sketchy at best, and possibly undefined behavior. Do not enable this feature under any circumstances in production code.
disable_track_allocations - Disables track_allocations feature. Purpose is to prevent --all-features enabling allocation tracking.