This article explores common pitfalls in Java date handling, explains thread‑unsafe SimpleDateFormat issues, demonstrates safe alternatives with ThreadLocal, Java 8 Time API, and zone‑aware calculations, and provides performance‑optimized patterns for high‑throughput applications.
Learn how to correctly handle time zones in JavaScript by storing dates in UTC, using the IANA database, detecting daylight saving time, and leveraging built‑in Intl APIs or libraries like Luxon, with practical code examples and best‑practice guidelines.
Several Stage‑3 TC39 proposals—including Error.isError for reliable error type checks, RegExp.escape for safe regex construction, Uint8Array methods for base64/hex conversion, and Temporal.TimeZone.prototype.equals for canonical time‑zone comparison—aim to enhance JavaScript’s core capabilities across browsers and Node.js.
This article presents Didi's comprehensive approach to designing, implementing, and governing a global data metric system for international ride‑hailing, covering business scenarios, metric‑related challenges, organizational structures, process flows, model architecture, time‑zone handling, tooling, and multi‑level governance.
This article explains how to create a ClickHouse materialized view that aggregates per‑minute data from a per‑second table, demonstrates insertion and query tests, investigates an unexpected 1970‑01‑01 timestamp caused by time‑zone handling, and provides the corrected view definition aligning field names.
The article investigates a MySQL performance issue where timestamp fields trigger high CPU usage due to time‑zone conversion, explains the internal representation of TIMESTAMP, shows stack traces and perf data, and proposes configuration and schema changes to resolve the problem.
A production MySQL incident showed sudden system CPU spikes and many running threads despite low query throughput, which was traced to the server's time_zone=system setting causing timestamp conversion to lock a global mutex, leading to excessive spin‑locks, context switches, and degraded performance that was resolved by changing the time_zone to a fixed offset.
