An example of using the LRUCachedGetter!
First we define some async helpers.
async function delayMs(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
// Return how long the async function takes to resolve in milliseconds
async function benchmarkMs(func) {
const before = Date.now();
await func();
const after = Date.now();
return after.valueOf() - before.valueOf();
}
Import & Create our LRUCachedGetter
const { LRUCachedGetter } = require("@kwiwk/lru-cached-getter");
const lru = new LRUCachedGetter({
getter: async(ms) => {
await delayMs(ms);
return ms;
},
hasher: ms => ms.toString(),
maxSize: 100
});
Get a value for the first time. The value is retrieved through the cache's getter.
let ms = await benchmarkMs(async() => {
const val = await lru.get(1000);
console.log(`Value: ${val}`);
});
console.log(`Time: ${ms}ms`);
Get the value a second time. The value is retrieved through the cache itself.
ms = await benchmarkMs(async() => {
const val = await lru.get(1000);
console.log(`Value: ${val}`);
});
console.log(`Time: ${ms}ms`);
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