Shawn Ng
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Systems

3 deep dives tagged Systems — real systems, real numbers, no hand-waving.

The Scary Truth About Your Phone's SIM Card

· 7 min read

Your SIM card is a computer with a CPU, OS, and network stack, running carrier applets you cannot audit. Inside the SIM, Simjacker, and what you can do.

  • security
  • mobile
  • sim

The Bug That Killed the Lights for 55 Million People

· 6 min read

How a race condition in power grid software caused the 2003 Northeast blackout, leaving 55 million people without electricity.

  • software-bugs
  • systems
  • race-conditions

Why Cache Misses Are the Real Performance Killer

· 7 min read

Understand how CPU cache misses destroy performance and learn cache-friendly coding patterns that can deliver up to 100x speed improvements.

  • performance
  • systems
  • cpu-cache

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