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* @license Apache-2.0
*
* Copyright (c) 2018 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var pow = require( '@stdlib/math/base/special/pow' );
// MAIN //
/**
* Computes an exponential delay.
*
* @private
* @param {NonNegativeInteger} retries - number of retries
* @param {number} max - maximum delay
* @returns {NonNegativeInteger} exponential delay
*/
function delay( retries, max ) {
var d = pow( 2, retries ) - 1;
if ( d > max ) {
d = max;
}
return d;
}
// EXPORTS //
module.exports = delay;
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