Function calculate_proportional_time_adjustment

pub fn calculate_proportional_time_adjustment(
    last_refresh: Instant,
    now: Instant,
    elapsed: Duration,
    window_duration: Duration,
    tokens_added: usize,
    max_tokens: usize,
) -> Instant

Calculate the proportional time adjustment for partial token refill

When tokens are partially refilled, the last refresh time needs to be adjusted proportionally to maintain accurate rate limiting.

Arguments

• last_refresh - The last refresh time
• now - Current time
• elapsed - Time elapsed since last refresh
• window_duration - Duration of the rate limiting window
• tokens_added - Number of tokens that were added
• max_tokens - Maximum number of tokens in the bucket

Returns

The adjusted last refresh time