A cache object that deletes the least-recently-used items. 

isaacs

lru-cache

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const perf = typeof performance === 'object' && performance &&

  typeof performance.now === 'function' ? performance : Date

const hasAbortController = typeof AbortController !== 'undefined'

/* istanbul ignore next - minimal backwards compatibility polyfill */

const AC = hasAbortController ? AbortController : Object.assign(

    constructor () { this.signal = new AC.AbortSignal }

    abort () { this.signal.aborted = true }

  { AbortSignal: class AbortSignal { constructor () { this.aborted = false }}}

const deprecatedOption = (opt, instead) => {

    warn(code, `${opt} option`, `options.${instead}`, LRUCache)

const deprecatedMethod = (method, instead) => {

  const code = `LRU_CACHE_METHOD_${method}`

    const { get } = Object.getOwnPropertyDescriptor(prototype, method)

    warn(code, `${method} method`, `cache.${instead}()`, get)

const deprecatedProperty = (field, instead) => {

  const code = `LRU_CACHE_PROPERTY_${field}`

    const { get } = Object.getOwnPropertyDescriptor(prototype, field)

    warn(code, `${field} property`, `cache.${instead}`, get)

const shouldWarn = code => typeof process === 'object' &&

const warn = (code, what, instead, fn) => {

  const msg = `The ${what} is deprecated. Please use ${instead} instead.`

  process.emitWarning(msg, 'DeprecationWarning', code, fn)

const isPosInt = n => n && n === Math.floor(n) && n > 0 && isFinite(n)

/* istanbul ignore next - This is a little bit ridiculous, tbh.

 * The maximum array length is 2^32-1 or thereabouts on most JS impls.

 * And well before that point, you're caching the entire world, I mean,

 * that's ~32GB of just integers for the next/prev links, plus whatever

 * else to hold that many keys and values.  Just filling the memory with

 * zeroes at init time is brutal when you get that big.

 * Maybe in the future, these limits will have expanded. */

const getUintArray = max => !isPosInt(max) ? null

: max <= Number.MAX_SAFE_INTEGER ? ZeroArray

    const UintArray = max ? getUintArray(max) : Array

      if (typeof this.sizeCalculation !== 'function') {

        throw new TypeError('sizeCalculating set to non-function')

        throw new TypeError('sizeCalculation set to non-function')

    this.fetchMethod = fetchMethod || null

    if (this.fetchMethod && typeof this.fetchMethod !== 'function') {

      throw new TypeError('fetchMethod must be a function if specified')

    this.keyList = new Array(max).fill(null)

    this.valList = new Array(max).fill(null)

    if (typeof disposeAfter === 'function') {

    this.noDisposeOnSet = !!noDisposeOnSet

        throw new TypeError('maxSize must be a positive integer if specified')

    this.allowStale = !!allowStale || !!stale

    this.updateAgeOnGet = !!updateAgeOnGet

    this.ttlResolution = isPosInt(ttlResolution) || ttlResolution === 0

        throw new TypeError('ttl must be a positive integer if specified')

    // do not allow completely unbounded caches

    if (this.max === 0 && this.ttl === 0 && this.maxSize === 0) {

      throw new TypeError('At least one of max, maxSize, or ttl is required')

    if (!this.ttlAutopurge && !this.max && !this.maxSize) {

        const msg = 'TTL caching without ttlAutopurge, max, or maxSize can ' +

          'result in unbounded memory consumption.'

        process.emitWarning(msg, 'UnboundedCacheWarning', code, LRUCache)

      deprecatedOption('stale', 'allowStale')

      deprecatedOption('length', 'sizeCalculation')

    this.starts = new ZeroArray(this.max)

      this.starts[index] = ttl !== 0 ? perf.now() : 0

      if (ttl !== 0 && this.ttlAutopurge) {

            this.delete(this.keyList[index])

        /* istanbul ignore else - unref() not supported on all platforms */

  "description": "A cache object that deletes the least-recently-used items.",

  "author": "Isaac Z. Schlueter <i@izs.me>",

    "prepublishOnly": "git push origin --follow-tags"

  "repository": "git://github.com/isaacs/node-lru-cache.git",

    "@size-limit/preset-small-lib": "^7.0.8",

		{
		"name": "lru-cache",
		"description": "A cache object that deletes the least-recently-used items.",
		"version": "7.7.2",
		"version": "7.7.3",
		"author": "Isaac Z. Schlueter <i@izs.me>",
		@@ -6,0 +6,0 @@ "keywords": [

		@@ -130,3 +130,3 @@ const perf = typeof performance === 'object' && performance &&
		if (typeof this.sizeCalculation !== 'function') {
		throw new TypeError('sizeCalculating set to non-function')
		throw new TypeError('sizeCalculation set to non-function')
		}
		@@ -133,0 +133,0 @@ }