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oxc-guard 894c8f9cd8 release(crates): oxc v0.148.0 (#26198 )

### 💥 BREAKING CHANGES

- a31567a allocator: [**BREAKING**] Make `Allocator::cursor_ptr` and `data_end_ptr` private (#26081) (overlookmotel)

### 🚀 Features

- 784e9fa minifier: Invert `!0` and `!1` in place for boolean context to `1` and `0` (#26050) (Armano)
- 1e902cc minifier: Expand fold leading assignments into the var decl (#26142) (Armano)
- 3ed4f6a minifier: Expand de morgan's optimization to allow move of `!` (#25930) (Armano)
- 5672585 parser: Attach all comments to nodes (#25944) (camc314)

### 🐛 Bug Fixes

- 4adfb4c semantic: Validate chained continue labels (#26157) (camc314)
- b874f48 ecmascript: `Math.round` only exact half ties (#26150) (camc314)
- a625378 minifier: Coerce omitted `indexOf` search argument (#26149) (camc314)
- dc7398b ecmascript: Trim trailing whitespace in string to number (#26148) (camc314)
- 243b685 transformer/object-rest: Lower multiple declarators correctly (#26147) (camc314)
- dc09a3a parser: Avoid panic on escaped string export names (#26146) (camc314)
- e412cf2 linter: Clamp invalid JS plugin locations (#26144) (camc314)
- c3dedc9 semantic: Skip function body bindings in parameters (#26099) (Dunqing)
- e74de61 transform-react: Match Babel diagnostic reporting (#26128) (Boshen)
- d5163d0 parser: Correctly classify unapplied pure annotations (#26084) (camc314)
- 8531b9b linter/plugins: Alter method for obtaining mutable `Program` when sending AST to JS plugins (#26077) (overlookmotel)
- 9b51658 regular_expression: Allow oversized decimal escape for Annex B (#26070) (leaysgur)
- c8de4df regular_expression: Reject oversized backreferences (#26055) (camc314)

### ⚡ Performance

- ac4785a diagnostics: Use fixed ANSI styles (#26130) (Boshen)
- 07a0793 packages/codegen: Flatten output in chunks (#26109) (overlookmotel)
- 487427a packages/codegen: Faster string flattening (#26108) (overlookmotel)
- 7785583 packages/codegen: Ensure indent strings are flattened (#26107) (overlookmotel)
- 0dd4db3 packages/codegen: Store mapping positions in an `Int32Array` (#26085) (overlookmotel)

2026-09-01 08:15:07 +00:00

src

feat(allocator)!: make Allocator::cursor_ptr and data_end_ptr private (#26081 )

2026-08-25 13:19:59 +00:00

tests

fix(rust): address nightly deprecations (#25998 )

2026-08-22 11:34:02 +00:00

Cargo.toml

release(crates): oxc v0.148.0 (#26198 )

2026-09-01 08:15:07 +00:00

CHANGELOG.md

release(crates): oxc v0.148.0 (#26198 )

2026-09-01 08:15:07 +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.