KPkpiyush8826·Jan 7, 2026Submission
156M orders/SEC matching engine in C++20 (Zero-Allocation)
2 points · Open discussionPIYUSH-KUMAR1809
order-matching-engine
C++2025–2026
PIYUSH-KUMAR1809 / order-matching-engine
order-matching-engine
High performance order matching engine
2Distinct people
4Mentions
0Explicit recommenders
169GitHub stars
What to know before exploring
What it is
High performance order matching engine
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
No recommendation phrase was found in the indexed comments.
No classified warning is attached to this page. Read the discussions before treating silence as approval.
Also in these discussions
No other repository is repeatedly linked in the same discussions.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by day4 dated mentions
Observed mentions: 2025-12-13 15:13:47 UTC to 2026-01-07 01:42:42 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| Dec 13 | 2025-12-13 00:00:00 UTC | 2025-12-14 00:00:00 UTC | 1 | 1 | 0 |
| Dec 14 | 2025-12-14 00:00:00 UTC | 2025-12-15 00:00:00 UTC | 0 | 0 | 0 |
| Dec 15 | 2025-12-15 00:00:00 UTC | 2025-12-16 00:00:00 UTC | 0 | 0 | 0 |
| Dec 16 | 2025-12-16 00:00:00 UTC | 2025-12-17 00:00:00 UTC | 0 | 0 | 0 |
| Dec 17 | 2025-12-17 00:00:00 UTC | 2025-12-18 00:00:00 UTC | 0 | 0 | 0 |
| Dec 18 | 2025-12-18 00:00:00 UTC | 2025-12-19 00:00:00 UTC | 0 | 0 | 0 |
| Dec 19 | 2025-12-19 00:00:00 UTC | 2025-12-20 00:00:00 UTC | 0 | 0 | 0 |
| Dec 20 | 2025-12-20 00:00:00 UTC | 2025-12-21 00:00:00 UTC | 0 | 0 | 0 |
| Dec 21 | 2025-12-21 00:00:00 UTC | 2025-12-22 00:00:00 UTC | 0 | 0 | 0 |
| Dec 22 | 2025-12-22 00:00:00 UTC | 2025-12-23 00:00:00 UTC | 0 | 0 | 0 |
| Dec 23 | 2025-12-23 00:00:00 UTC | 2025-12-24 00:00:00 UTC | 0 | 0 | 0 |
| Dec 24 | 2025-12-24 00:00:00 UTC | 2025-12-25 00:00:00 UTC | 0 | 0 | 0 |
| Dec 25 | 2025-12-25 00:00:00 UTC | 2025-12-26 00:00:00 UTC | 0 | 0 | 0 |
| Dec 26 | 2025-12-26 00:00:00 UTC | 2025-12-27 00:00:00 UTC | 0 | 0 | 0 |
| Dec 27 | 2025-12-27 00:00:00 UTC | 2025-12-28 00:00:00 UTC | 0 | 0 | 0 |
| Dec 28 | 2025-12-28 00:00:00 UTC | 2025-12-29 00:00:00 UTC | 0 | 0 | 0 |
| Dec 29 | 2025-12-29 00:00:00 UTC | 2025-12-30 00:00:00 UTC | 0 | 0 | 0 |
| Dec 30 | 2025-12-30 00:00:00 UTC | 2025-12-31 00:00:00 UTC | 0 | 0 | 0 |
| Dec 31 | 2025-12-31 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 0 | 0 | 0 |
| Jan 1 | 2026-01-01 00:00:00 UTC | 2026-01-02 00:00:00 UTC | 0 | 0 | 0 |
| Jan 2 | 2026-01-02 00:00:00 UTC | 2026-01-03 00:00:00 UTC | 0 | 0 | 0 |
| Jan 3 | 2026-01-03 00:00:00 UTC | 2026-01-04 00:00:00 UTC | 0 | 0 | 0 |
| Jan 4 | 2026-01-04 00:00:00 UTC | 2026-01-05 00:00:00 UTC | 1 | 1 | 0 |
| Jan 5 | 2026-01-05 00:00:00 UTC | 2026-01-06 00:00:00 UTC | 0 | 0 | 0 |
| Jan 6 | 2026-01-06 00:00:00 UTC | 2026-01-07 00:00:00 UTC | 1 | 1 | 0 |
| Jan 7 | 2026-01-07 00:00:00 UTC | 2026-01-08 00:00:00 UTC | 1 | 1 | 0 |
What Hacker News says
4 sourcesShow HN: Market Processing Engine in C++20 (150M orders/SEC)
Author here.
This started as a quest to see how fast I could push a single core on an M1 Pro.
I built an order matching engine from scratch using C++20.
Initially, it did ~100k ops/sec. After a month of optimization, it now does ~156M ops/sec.
Key optimizations:
- Removed all mutexes (Shard-per-Core architecture).
- Custom lock-free SPSC Ring Buffer for thread communication.
- Replaced std::map with flat vectors + bitset scanning (using CTZ intrinsics).
- Zero-allocation hot path using std::pmr (Polymorphic Memory Resources) on the stack.
To prove it handles real markets (not just random numbers), I verified it by replaying captured Binance L3 market data (132M ops/sec).
Detailed write-up of the optimization journey here:
https://medium.com/@kpiyush8826/how-i-optimized-a-c-matching...
Happy to answer questions!
2 points · Open discussionShow HN: High-Performance Order Matching Engine in C++20 (2.2M ops/SEC)
I built this to explore low-latency C++ patterns.
It uses a sharded architecture (one thread per symbol group) to avoid mutex contention during matching. Recently moved to int64_t fixed-point pricing and added memory compaction to prevent leaks in long-running processes.
2 points · Open discussion