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Python has had async for 10 years – why isn't it more popular?

news.ycombinator.com Unknown 2025-10-17 17:24:57

The Python Documentary dropped this morning. In the middle of the documentary, there’s a dramatic segment about how the transition from Python 2 to 3 divided the community (spoiler alert: it didn’t in the end). The early versions of Python 3 (3.0-3.4) were mostly focused on stability and offering pathways for users moving from 2.7. Along came 3.5 in 2015 with a new feature: async and await keywords for executing coroutines. Ten years and nine releases later, Python 3.14 is weeks away. Whilst

Topics: async asyncio loop python tasks
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Isolated(any)

news.ycombinator.com Matt Massicotte 2025-10-20 04:37:10

Ahh, @isolated(any) . It’s an attribute of contradictions. You might see it a lot, but it’s ok to ignore it. You don’t need to use it, but I think it should be used more. It must always take an argument, but that argument cannot vary. Confusing? Definitely. But we’ll get to it all. To understand why @isolated(any) was introduced, we need to take a look at async functions. let respond To Emergency : () async -> Void This is about as simple a function type as we can get. But, things start to g

Topics: actor async function isolated responder
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Show HN: Rust macro utility for batching expensive async operations

news.ycombinator.com Unknown 2025-11-11 04:43:01

batched Rust macro utility for batching expensive async operations. Installation cargo add batched Or add this to your Cargo.toml : [ dependencies ] batched = " 0.2.7 " limit : Maximum amount of items that can be grouped and processed in a single batch. : Maximum amount of items that can be grouped and processed in a single batch. concurrent : Maximum amount of concurrent batched tasks running (default: Infinity ) : Maximum amount of concurrent batched tasks running (default: ) window :

Topics: add async batch batched fn
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Asynchrony is not concurrency

news.ycombinator.com Unknown 2026-01-08 00:21:38

Yes I know about that one talk from Rob Pike. The title of this blog post is not something you hear people say often, if ever. What you do hear people say is “concurrency is not parallelism”, but that’s not as useful, in my opinion. Let’s see how Wikipedia defines those terms: Concurrency refers to the ability of a system to execute multiple tasks through simultaneous execution or time-sharing (context switching) Parallel computing is a type of computation in which many calculations or proce

Topics: async code concurrency io task
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Asynchrony Is Not Concurrency

news.ycombinator.com Unknown 2026-01-08 12:21:38

Yes I know about that one talk from Rob Pike. The title of this blog post is not something you hear people say often, if ever. What you do hear people say is “concurrency is not parallelism”, but that’s not as useful, in my opinion. Let’s see how Wikipedia defines those terms: Concurrency refers to the ability of a system to execute multiple tasks through simultaneous execution or time-sharing (context switching) Parallel computing is a type of computation in which many calculations or proce

Topics: async code concurrency io task
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SQLite async connection pool for high-performance

news.ycombinator.com Unknown 2026-01-15 10:26:32

aiosqlitepool aiosqlitepool is a high-performance connection pool for asyncio SQLite applications. By managing a pool of reusable database connections, it eliminates connection overhead and delivers significant performance gains. Important: aiosqlitepool is not a SQLite database driver. It's a performance-boosting layer that works with an asyncio driver like aiosqlite, not as a replacement for it. aiosqlitepool in three points: Eliminates connection overhead : It avoids repeated database co

Topics: async await conn connection pool
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Zig's New Async I/O

news.ycombinator.com Unknown 2026-01-21 00:03:41

Asynchronicity is not concurrency. In the Zig Roadmap 2026 stream Andrew announced a new way of doing I/O, let’s see what are the goals of this upcoming design and how that relates to the revival of async / await in Zig. The new I/O Interface The most notable change to Zig is the introduction of a new interface in charge of all I/O operations. Most importantly, the Io interface is now expected to be provided by the caller, just like we already do with Allocator . Old Zig: const std = @impor

Topics: async const data io try
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Show HN: asyncmcp – Run MCP over async transport via AWS SNS+SQS

news.ycombinator.com Unknown 2026-01-25 08:04:00

asyncmcp - Async transport layers for MCP Overview A regular MCP Server but working over queues : queue-based-mcp-example.mov Quoting from the official description : MCP is an open protocol that standardizes how applications provide context to LLMs. But a lot of this context is not always readily available and takes time for the applications to process - think batch processing APIs, webhooks or queues. In these cases with the current transport layers, the MCP server would have to expose

Topics: async client mcp server transport
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Show HN: BreakerMachines – Modern Circuit Breaker for Rails with Async Support

news.ycombinator.com Unknown 2026-01-22 04:35:28

BreakerMachines The circuit breaker that went where no Ruby has gone before! ⭐ A battle-tested Ruby implementation of the Circuit Breaker pattern, built on state_machines for reliable distributed systems protection. Quick Start gem ' breaker_machines ' class PaymentService include BreakerMachines :: DSL circuit :stripe do threshold failures : 3 , within : 1 . minute reset_after 30 . seconds fallback { { error : "Payment queued for later" } } end def charge ( amount ) circuit ( :stripe ) . w

Topics: async circuit docs md redis
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