Parsing and Validation Caching

By default, Yoga will maintain a parsing and validation cache. If requests contain queries that have been executed already before, they will not be parsed and validated again - only once, on the first request.

Note that using the parser cache can improve performance up to ~60%, and using the validation cache up to ~50% (based on benchmarks).

This behavior is built-in and can be optionally disabled using the parserCache and validationCache options:

import { createYoga } from 'graphql-yoga'
import { createServer } from 'node:http'
import { schema } from './my-schema'
 
const yoga = createYoga({
  schema,
  parserCache: false, // disable parse caching
  validationCache: false // disable validation caching
})
 
const server = createServer(yoga)
server.listen(4000, () => {
  console.info('Server is running on http://localhost:4000/graphql')
})

Furthermore, you can provide your own cache store to both of these plugins by implementing the following interface:

import { DocumentNode, GraphQLError } from 'graphql'
import { createYoga } from 'graphql-yoga'
import { createServer } from 'node:http'
import { schema } from './my-schema'
import {
  documentCacheStore,
  errorCacheStore,
  validationCacheStore
} from './my-cache'
 
interface CacheStore<T> {
  get(key: string): T | undefined
  set(key: string, value: T): void
}
 
const yoga = createYoga({
  schema,
  parserCache: {
    documentCache: documentCacheStore as CacheStore<DocumentNode>,
    errorCache: errorCacheStore as CacheStore<Error>
  },
  validationCache: validationCacheStore as CacheStore<readonly GraphQLError[]>
})
 
const server = createServer(yoga)
server.listen(4000, () => {
  console.info('Server is running on http://localhost:4000/graphql')
})

Yoga uses envelop's plugins useParserCache and useValidationCache underneath, read more about them on their respective websites.

Last updated on October 2, 2022

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