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Articles from Dev.to · BAOFUFAN · 18 articles · Updated every 3 hours · View all reads

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Dev.to · BAOFUFAN 7h ago

I Rewrote Our Crawler with asyncio and Got a 15x Performance Boost

Last week, I finally snapped. Our “legacy” news aggregator was crawling 200 sites in 8 minutes, with...

Dev.to · BAOFUFAN 7h ago

asyncio Pitfalls: The Mistake That Cost Me 3 Hours

Here’s the story: last week my boss threw a “simple” task at me — pull data from 120 internal APIs...

Dev.to · BAOFUFAN 7h ago

The asyncio Mistake That Cost Me 3 Hours

It happened last year when I was adding a “batch domain liveness check” feature to our internal...

Dev.to · BAOFUFAN 7h ago

3 Hours Wasted on asyncio Pitfalls That Almost Took Down Production

Last Friday at 5 PM, right when I was about to close my laptop and sneak out, the alert channel...

Dev.to · BAOFUFAN 7h ago

Is asyncio Really Better Than Multithreading? I Tested 100 Concurrent Requests, and the Difference Is Huge

Last month, the data platform I maintain suddenly got a new requirement: run health checks against...

Dev.to · BAOFUFAN 7h ago

3-Hour Debugging: How `time.sleep` in Async Functions Killed Our asyncio Concurrency

Here’s the situation: we have a data collection service that fetches data from a dozen upstream APIs....

Dev.to · BAOFUFAN 7h ago

The asyncio Mistake That Cost Me 3 Hours

Last week I was building an internal monitoring tool that needed to fetch pages from over 200...

Dev.to · BAOFUFAN 7h ago

I Rewrote Our Scraper with asyncio. My CTO Thought I Added Servers.

Here's the story. Last week, the product manager dropped a requirement: we needed to fetch real-time...

Dev.to · BAOFUFAN 7h ago

I Spent 3 Hours on This Asyncio Bug — Here’s How to Avoid It

Last Friday at 5:30 PM, I was about to shut my laptop and call it a day when our operations colleague...

Dev.to · BAOFUFAN 8h ago

How asyncio Slashed Our Data Aggregation Latency from 30s to 2s

Last Thursday afternoon, operations suddenly @ me in the group chat: "Dude, the activity page data is...

Dev.to · BAOFUFAN 8h ago

asyncio Pitfalls: 3 Hours Debugging a Concurrent Crawler

Last week my boss threw me a task: pull data from 50 third‑party APIs and build an aggregated report....

Dev.to · BAOFUFAN 8h ago

How I Boosted Concurrency 40x with asyncio — and Ops Thought We Were DDoSed

Last month, the product manager cornered me in the break room and fired off: “The dashboard timed out...

Dev.to · BAOFUFAN 8h ago

From 20 Minutes to 90 Seconds: Refactoring a 100-Endpoint Crawler with asyncio

Last Thursday afternoon, my boss tossed me a “small request”: shrink the data collection cycle of our...

Dev.to · BAOFUFAN 8h ago

The 3-Hour Async Bug: Why My 1000 Concurrent Requests Ran One by One

Last week, my boss dropped a requirement on my desk: scrape hundreds of thousands of product listings...

Dev.to · BAOFUFAN 8h ago

Python asyncio Pitfalls: The Bug That Cost Me 3 Hours

Last week I got a requirement: fetch data from 30 third-party APIs, clean it, and store it in the...

Dev.to · BAOFUFAN 8h ago

How I Boosted Our Web Scraper 20x with asyncio — And the CTO Noticed

Here’s the story. Last month, my team lead tossed me a “small task”: revamp the company’s sentiment...

Dev.to · BAOFUFAN 1d ago

asyncio Pitfalls: A 3-Hour Debugging Nightmare That Nearly Took Down Production

Here’s what happened: last week my manager asked me to optimize a data aggregation service that calls...

Dev.to · BAOFUFAN 2d ago

Designing a Code Snippet Manager: From Requirements to Implementation

1. Why You Need a Code Snippet Manager As developers, we deal with code every single day....