Seoul shares extend gains late Wed. morning on chip rally

What Actually Happens When You Put a CDN in Front of Your Website?

If you've worked on web performance for any amount of time, you've probably heard the advice: “Put it behind a CDN.” But what does a CDN actually do between the browser and your server?

• CDN creates edge servers closer to users, reducing latency
• Without CDN, user in Singapore accesses US-origin server, increasing latency
• CDN effectiveness depends on TTL, cache hits/misses, purge mechanism

53m ago ·dev.to

How We Reset Monthly Quotas Without Race Conditions or Cron Drift

This article was originally published on Jo4 Blog . If you're billing monthly via Stripe or RevenueCat, it's tempting to reset usage quotas inside your webhook handler.

• Reset monthly quotas without race conditions or cron drift
• Use Spring Scheduler with 5-minute past midnight UTC cron
• Instance-level advisory lock prevents simultaneous resets

54m ago ·dev.to

How I Built a Color Picker That Actually Converts Colors Correctly (HEX/RGB/HSL)

While working on a design system recently, I kept running into the same frustrating problem: I'd grab a color from Figma in HEX format, need it in HSL for a CSS variable, and end up bouncing between…

1h ago ·dev.to

Making a game on a custom bytecode VM in 7 days and 3kB

1h ago ·laurent.le-brun.eu