Uploaded July 2026 | Updated September 2026, 2 weeks ago

---

A popular C++ question often asked in quant dev inteviews, this separates those who 'just get things done' from those that drill deeper.

00:00 introduction
00:35 question
01:40 "slow" code
03:25 the issue with this code
04:58 more optimized approach
10:50 sampling profiler with linux perf
12:00 replacing from_chars
14:48 how much did that save us?
15:05 moving numberical parsing to a compile time 2d array