@envelop/validation-cache/esm/index.js

This plugins adds simple LRU caching to your `validate`, to improve performance by caching the validation result.

import { print } from 'graphql';
import LRU from 'lru-cache';
const DEFAULT_MAX = 1000;
const DEFAULT_TTL = 3600000;
const rawDocumentSymbol = Symbol('rawDocument');
export const useValidationCache = (pluginOptions = {}) => {
    const resultCache = typeof pluginOptions.cache !== 'undefined'
        ? pluginOptions.cache
        : new LRU({
            max: DEFAULT_MAX,
            maxAge: DEFAULT_TTL,
        });
    return {
        onSchemaChange() {
            if (resultCache.reset) {
                resultCache.reset?.();
            }
            else if ('clear' in resultCache) {
                resultCache.clear?.();
            }
        },
        onParse({ params, extendContext }) {
            extendContext({ [rawDocumentSymbol]: params.source.toString() });
        },
        onValidate({ params, context, setResult }) {
            const key = context[rawDocumentSymbol] ?? print(params.documentAST);
            const cachedResult = resultCache.get(key);
            if (cachedResult !== undefined) {
                setResult(cachedResult);
            }
            return ({ result }) => {
                // @ts-expect-error TODO: not sure how we will make it dev friendly
                resultCache.set(key, result);
            };
        },
    };
};