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'use strict'
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module.exports = function () {
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// 2,147,483,647 (2^31 − 1) stands for max SMI value (an internal optimization of V8).
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// With this upper bound, if you'll be generating 1k ids/sec, you're going to hit it in ~25 days.
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// This is very likely to happen in real-world applications, hence the limit is enforced.
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// Growing beyond this value will make the id generation slower and cause a deopt.
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// In the worst cases, it will become a float, losing accuracy.
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const maxInt = 2147483647
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let nextReqId = 0
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return function genReqId (req) {
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nextReqId = (nextReqId + 1) & maxInt
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return `req-${nextReqId.toString(36)}`
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}
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}
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