https://ricosheaven.com/en/tags/retrospective/ Recent content in Retrospective on RICO STUDIO Hugo en Sat, 17 Oct 2026 06:00:00 +0900 https://ricosheaven.com/en/posts/cpp-hts-engine-part6-production-metrics-dual-path-rollout/ Sat, 17 Oct 2026 06:00:00 +0900 https://ricosheaven.com/en/posts/cpp-hts-engine-part6-production-metrics-dual-path-rollout/ The complete 540-second market open benchmark scorecard comparing AS-IS vs. TO-BE, alongside our Dual-Path rollout architecture and engineering lessons from modernizing a multi-decade C++ trading system without downtime.