orderbook-rs 0.6.2

A high-performance, lock-free price level implementation for limit order books in Rust. This library provides the building blocks for creating efficient trading systems with support for multiple order types and concurrent access patterns.
Documentation 
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use std::time::{SystemTime, UNIX_EPOCH};

/// Returns the current time in milliseconds since UNIX epoch.
///
/// Returns 0 if the system clock is set before the Unix epoch (1970-01-01),
/// which should never happen on correctly-configured systems.
pub fn current_time_millis() -> u64 {
    SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .map(|d| d.as_millis() as u64)
        .unwrap_or(0)
}