The Quest Begins (The "Why")
Honestly, I started down this rabbit hole because I kept hearing the same hype: “HFT firms make millions in microseconds!” My buddy at a fintech startup bragged about his rig pulling in profits while I was still stuck debugging a cron job that ran every five minutes. I felt like a low‑level grunt watching the final boss dance around me, untouchable. The question that kept me up at night was simple: What actually separates the pros from the pretenders when you’re trying to trade on a millisecond scale? I wanted to slay the dragon of latency and see if I could write something that didn’t just look cool on a slide deck but actually reacted to market data faster than a human could blink.
The Revelation (The Insight)
The big “aha!” moment came when I stopped thinking about HFT as a magical black box and started looking at the pipeline: market data → decision → order. In most retail‑grade examples, people poll a REST endpoint every 100 ms, run a few calculations, then fire off an order. That’s like trying to dodge a boss attack by looking at the screen only after the swing has already landed. The real trick is event‑driven, low‑latency processing—you react to the data the instant it arrives, not on a timer.
