effect-concurrency-fibers

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🇺🇸

Original

English

🇨🇳

Translation

Chinese

Concurrency & Fibers

并发与Fiber

When to use

适用场景

Parallelizing independent work safely with limits
Coordinating background tasks and lifecycle
Racing operations for latency control

安全地对独立工作进行并行化并设置限制
协调后台任务与生命周期
通过竞争操作控制延迟

Parallel Patterns

并行模式

const results = yield* Effect.all(tasks, { concurrency: 10 })

const processed = yield* Effect.forEach(items, processItem, { concurrency: 5 })

const results = yield* Effect.all(tasks, { concurrency: 10 })

const processed = yield* Effect.forEach(items, processItem, { concurrency: 5 })

Fiber Lifecycle

Fiber生命周期

const fiber = yield* Effect.fork(work)
const value = yield* Fiber.join(fiber)
yield* Fiber.interrupt(fiber)

const fiber = yield* Effect.fork(work)
const value = yield* Fiber.join(fiber)
yield* Fiber.interrupt(fiber)

Racing / Timeouts

竞争/超时

const fastest = yield* Effect.race(slow, fast)
const withTimeout = yield* Effect.timeout(operation, "5 seconds")

const fastest = yield* Effect.race(slow, fast)
const withTimeout = yield* Effect.timeout(operation, "5 seconds")

Guidance

指导原则

Limit concurrency to protect resources
Use
```
fork
```
for background loops; always manage interruption
Prefer
```
Effect.all
```
for independent operations
Use
```
Effect.forEach
```
with
```
concurrency
```
for pools
Combine with retries and timeouts for resilient parallelism

限制并发数以保护资源
对后台循环使用
```
fork
```
；务必管理中断
对于独立操作，优先使用
```
Effect.all
```
对资源池使用带
```
concurrency
```
参数的
```
Effect.forEach
```
结合重试与超时实现弹性并行性

Pitfalls

注意事项

Unbounded concurrency can exhaust CPU/IO or hit rate limits
Always interrupt background fibers on shutdown
Don’t block inside fibers; keep work asynchronous/effectful

无限制的并发会耗尽CPU/IO资源或触发速率限制
关闭时务必中断后台Fiber
不要在Fiber内阻塞；保持工作为异步/有副作用的形式

Cross-links

Local Source Reference

本地源码参考

CRITICAL: Search local Effect source before implementing

The full Effect source code is available at

docs/effect-source/

. Always search the actual implementation before writing Effect code.

重要提示：实现前先搜索本地Effect源码

完整的Effect源码位于

docs/effect-source/

。编写Effect代码前，务必先查看实际的实现。

Key Source Files

关键源码文件

Effect:
```
docs/effect-source/effect/src/Effect.ts
```
Fiber:
```
docs/effect-source/effect/src/Fiber.ts
```

Duration:

docs/effect-source/effect/src/Duration.ts

Effect:
```
docs/effect-source/effect/src/Effect.ts
```
Fiber:
```
docs/effect-source/effect/src/Fiber.ts
```

Duration:

docs/effect-source/effect/src/Duration.ts

Example Searches

示例搜索

bash

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bash

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Find Effect.all and concurrency patterns

查找Effect.all和并发模式

grep -F "Effect.all" docs/effect-source/effect/src/Effect.ts

Find forEach with concurrency

查找带concurrency参数的forEach

grep -rF "forEach" docs/effect-source/effect/src/ | grep -F "concurrency"

Study Fiber lifecycle operations

研究Fiber生命周期操作

grep -F "export" docs/effect-source/effect/src/Fiber.ts | grep -E "fork|join|interrupt"

Find race and timeout implementations

查找race和timeout的实现

grep -F "race" docs/effect-source/effect/src/Effect.ts grep -F "timeout" docs/effect-source/effect/src/Effect.ts

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