Every article tagged Async, in one place.
Showing 5 articles
await in a loop runs requests one after another. JavaScript's promise combinators let you run them together and decide how to handle failures. Sequential vs parallel // Slow: each request waits for the previous one for (const id of ids) { results.push(await fe...
Async Rust lets one thread handle thousands of network connections. Rust provides async / await syntax; a runtime such as Tokio actually runs the futures. Setup [dependencies] tokio = { version = "1", features = ["full"] } reqwest = { version = "0.12", feature...
Short answer: a promise represents a value that will be available later; it's pending, then fulfilled or rejected. async / await is syntax on top of promises: an async function always returns a promise, and await pauses the function until a promise settles. Sa...
Two common needs in API servers: running code once when the app starts or stops, and doing a bit of work after the response is sent. Lifespan: startup and shutdown from contextlib import asynccontextmanager import httpx from fastapi import FastAPI @asynccontex...
Users navigate away, type a new search or close a dialog while a request is still running. AbortController lets you cancel that work instead of letting it finish uselessly or, worse, overwrite newer results. Cancel a fetch const controller = new AbortControlle...
