Cross-platform async file API for Python. Blazing fast like Shameimaru Aya.
Project description
ayafileio
「幻想郷最速のファイルI/O、風神少女の如く」
—— 射命丸文,今日も全力で翔ける
跨平台异步文件 I/O 库,使用原生异步 I/O 机制。
Windows 上借 IOCP(I/O 完成端口)之力,Linux 上支持 io_uring(内核 5.1+)或线程池降级,实现真正无阻塞的文件操作。
📸 核心特性
| 特性 | 说明 |
|---|---|
| 🍃 零线程开销 | 无需 run_in_executor,真异步平台无后台线程 |
| 📰 内核级完成 | IOCP / io_uring 直达内核,无用户态调度延迟 |
| ⚡ 高并发友好 | 数千并发文件操作,文文团扇一挥间 |
| 🎴 标准 API | 熟悉的文件接口,支持 async/await |
| 📖 文本二进制支持 | 文本模式自动编解码 |
| 🔧 统一配置系统 | 运行时动态调整所有参数 |
| 🌍 跨平台 | Windows / Linux / macOS 皆可翱翔 |
🛠️ 安装
pip install ayafileio
系统要求:
- Python 3.10+
- Windows 7 / Server 2008 R2 或更高版本,或 Linux (内核 5.1+ 可启用 io_uring)
- 无其他依赖
🚀 快速开始
import asyncio
import ayafileio
async def main():
# 写入文件——像风一样快
async with ayafileio.open("example.txt", "w") as f:
await f.write("Hello, async world!\n")
# 读取并自动解码——文文新闻,一触即达
async with ayafileio.open("example.txt", "r", encoding="utf-8") as f:
content = await f.read()
print(content)
# 二进制操作——数据如风,来去无痕
async with ayafileio.open("data.bin", "rb") as f:
data = await f.read(1024)
await f.seek(0, 0)
asyncio.run(main())
⚙️ 统一配置
ayafileio 提供统一的配置系统,所有参数可在运行时动态调整:
import ayafileio
# 查看当前配置
config = ayafileio.get_config()
print(config)
# {
# "handle_pool_max_per_key": 64,
# "handle_pool_max_total": 2048,
# "io_worker_count": 0,
# "buffer_pool_max": 512,
# "buffer_size": 65536,
# "close_timeout_ms": 4000,
# "io_uring_queue_depth": 256,
# "io_uring_sqpoll": False,
# "enable_debug_log": False
# }
# 修改配置——风势加强!
ayafileio.configure({
"io_worker_count": 8,
"buffer_size": 131072, # 128KB 缓冲区
"close_timeout_ms": 2000,
})
# 重置为默认值
ayafileio.reset_config()
配置项说明
| 配置项 | 默认值 | 说明 |
|---|---|---|
handle_pool_max_per_key |
64 | 每个文件最大缓存句柄数 (Windows) |
handle_pool_max_total |
2048 | 全局最大缓存句柄数 (Windows) |
io_worker_count |
0 | I/O 工作线程数,0=自动 |
buffer_pool_max |
512 | 最大缓存缓冲区数 |
buffer_size |
65536 | 单个缓冲区大小 (字节) |
close_timeout_ms |
4000 | 关闭时等待 pending I/O 的超时 (ms) |
io_uring_queue_depth |
256 | io_uring 队列深度 (Linux) |
io_uring_sqpoll |
False | 是否启用 SQPOLL 模式 (Linux) |
enable_debug_log |
False | 是否启用调试日志 |
🔍 后端信息
查看当前使用的后端:
info = ayafileio.get_backend_info()
print(info)
# Windows: {'platform': 'windows', 'backend': 'iocp', 'is_truly_async': True, ...}
# Linux (io_uring): {'platform': 'linux', 'backend': 'io_uring', 'is_truly_async': True, ...}
# Linux (fallback): {'platform': 'linux', 'backend': 'thread_pool', 'is_truly_async': False, ...}
# macOS: {'platform': 'macos', 'backend': 'thread_pool', 'is_truly_async': False, ...}
📚 API 参考
AsyncFile 类
class AsyncFile:
def __init__(self, path: str | Path, mode: str = "rb", encoding: str | None = None): ...
async def read(self, size: int = -1) -> str | bytes: ...
async def write(self, data: str | bytes) -> int: ...
async def seek(self, offset: int, whence: int = 0) -> int: ...
async def flush(self) -> None: ...
async def close(self) -> None: ...
async def readline(self) -> str | bytes: ...
def __aiter__(self) -> AsyncFile: ...
async def __anext__(self) -> str | bytes: ...
支持的模式
| 模式 | 说明 |
|---|---|
"r", "rb" |
读取(文本/二进制) |
"w", "wb" |
写入(文本/二进制) |
"a", "ab" |
追加(文本/二进制) |
"x", "xb" |
独占创建(文本/二进制) |
加上 "+" |
读写组合 |
配置函数
def configure(options: dict) -> None: ... # 统一配置
def get_config() -> dict: ... # 获取当前配置
def reset_config() -> None: ... # 重置为默认值
def get_backend_info() -> dict: ... # 获取后端信息
# 向后兼容(推荐使用上面的统一配置)
def set_handle_pool_limits(max_per_key: int, max_total: int) -> None: ...
def get_handle_pool_limits() -> tuple[int, int]: ...
def set_io_worker_count(count: int = 0) -> None: ...
🧪 性能对比
在同等环境下(测试时长 10 秒,随机读写混合),ayafileio 展现出了天狗般的速度:
| 并发数 | ayafileio | aiofiles | 优势 |
|---|---|---|---|
| 50 | 2,043 ops/s | 1,657 ops/s | +23% |
| 100 | 770 ops/s | 405 ops/s | +90% |
| 500 | 1,130 ops/s | 1,032 ops/s | +9.5% |
P99 延迟对比(越低越好):
- 100 并发:ayafileio 33ms vs aiofiles 562ms
- 200 并发:ayafileio 35ms vs aiofiles 155ms
Windows 10 + 机械硬盘实测——即使是即将报废的硬件,文文依然能跑出速度。
🤝 贡献
欢迎投稿「文文。新闻」!请:
- Fork 本仓库
- 创建功能分支(
git checkout -b feature/amazing-feature) - 添加测试
- 确保基准测试仍通过
- 提交拉取请求
📄 许可证
MIT 许可证 —— 最速最自由,详见 LICENSE。
「遅いのは罪だぜ?」
—— 射命丸文,『文文。新闻』主编
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