@geersch/retry/dist/strategies/decorrelated-jitter.backoff-strategy.js

Backoff strategies to use when retrying a function after a given delay.

const MEDIAN_INTERVAL_SCALING_FACTOR = 1 / 1.4;
export class DecorrelatedJitterBackoffStrategy {
    baseDelay;
    constructor({ baseDelay = 100 } = {}) {
        this.baseDelay = baseDelay;
    }
    *getGenerator(maxRetries) {
        let attempt = 0;
        let previousValue = 0;
        while (attempt < maxRetries) {
            const randomizedAttempt = attempt + Math.random();
            const nextValue = Math.pow(2, randomizedAttempt) * Math.tanh(Math.sqrt(4.0 * randomizedAttempt));
            const formulaIntrinsicValue = Math.max(0, nextValue - previousValue);
            previousValue = nextValue;
            yield formulaIntrinsicValue * MEDIAN_INTERVAL_SCALING_FACTOR * this.baseDelay;
            attempt += 1;
        }
    }
}
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