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-rw-r--r--shared/components/src/utils/memoize.ts26
1 files changed, 26 insertions, 0 deletions
diff --git a/shared/components/src/utils/memoize.ts b/shared/components/src/utils/memoize.ts
new file mode 100644
index 0000000..a5e07ef
--- /dev/null
+++ b/shared/components/src/utils/memoize.ts
@@ -0,0 +1,26 @@
+// eslint-disable-next-line import/prefer-default-export
+export function memoize<T extends unknown[], S>(
+ fn: (...args: T) => S,
+ hashFn: (...args: unknown[]) => string = JSON.stringify,
+ entryLimit = 5,
+): (...args: T) => S {
+ const cache: Map<string, S> = new Map();
+
+ return (...args: T) => {
+ const value = hashFn(args);
+ if (cache.has(value)) {
+ return cache.get(value);
+ }
+
+ const returnedValue: S = fn.apply(this, args);
+
+ if (cache.size >= entryLimit) {
+ const iterator = cache.keys();
+ const firstValue = iterator.next().value;
+ // remove oldest value
+ cache.delete(firstValue);
+ }
+ cache.set(value, returnedValue);
+ return returnedValue;
+ };
+}