46 lines
1.1 KiB
Plaintext
46 lines
1.1 KiB
Plaintext
// LRU cache inspired from hashlru (https://github.com/dominictarr/hashlru/blob/v1.0.4/index.js) but object replaced with Map to improve performance
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function createLruCache(maxCacheSize) {
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if (maxCacheSize < 1) {
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return {
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get: function get() {
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return undefined;
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},
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set: function set() {}
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};
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}
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var cacheSize = 0;
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var cache = new Map();
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var previousCache = new Map();
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function update(key, value) {
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cache.set(key, value);
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cacheSize++;
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if (cacheSize > maxCacheSize) {
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cacheSize = 0;
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previousCache = cache;
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cache = new Map();
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}
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}
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return {
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get: function get(key) {
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var value = cache.get(key);
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if (value !== undefined) {
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return value;
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}
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if ((value = previousCache.get(key)) !== undefined) {
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update(key, value);
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return value;
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}
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},
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set: function set(key, value) {
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if (cache.has(key)) {
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cache.set(key, value);
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} else {
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update(key, value);
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}
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}
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};
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}
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export { createLruCache };
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//# sourceMappingURL=lru-cache.mjs.map
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