GraphQL-JS is a very well written runtime implementation of the latest GraphQL spec. However, by compiling to JS, V8 is able to create optimized
code which yields much better performance. graphql-jit leverages this behaviour of V8 optimization by compiling the queries into functions to significantly improve performance (See benchmarks below)
Benchmarks
GraphQL-JS 16 on Node 16.13.0
$ yarn benchmark skip-json
Starting introspection
graphql-js x 1,941 ops/sec ±2.50% (225 runs sampled)
graphql-jit x 6,158 ops/sec ±2.38% (222 runs sampled)
Starting fewResolvers
graphql-js x 26,620 ops/sec ±2.41% (225 runs sampled)
graphql-jit x 339,223 ops/sec ±2.94% (215 runs sampled)
Starting manyResolvers
graphql-js x 16,415 ops/sec ±2.36% (220 runs sampled)
graphql-jit x 178,331 ops/sec ±2.73% (221 runs sampled)
Starting nestedArrays
graphql-js x 127 ops/sec ±1.43% (220 runs sampled)
graphql-jit x 1,316 ops/sec ±2.58% (219 runs sampled)
Done in 141.25s.
In order to achieve better performance, the graphql-jit compiler introduces some limitations.
The primary limitation is that all computed properties must have a resolver and only these can return a Promise.
Install
yarn add graphql-jit
Example
For complete working examples, check the examples/ directory
constquery=`{ hello}`;const{ parse }=require("graphql");constdocument=parse(query);const{ compileQuery, isCompiledQuery }=require("graphql-jit");constcompiledQuery=compileQuery(schema,document);// check if the compilation is successfulif(!isCompiledQuery(compiledQuery)){console.error(compiledQuery);thrownewError("Error compiling query");}
Compiles the document AST, using an optional operationName and compiler options.
schema {GraphQLSchema} - graphql schema object
document {DocumentNode} - document query AST ,can be obtained by parse from graphql
operationName {string} - optional operation name in case the document contains multiple operations(queries/mutations/subscription).
compilerOptions {Object} - Configurable options for the compiler
disableLeafSerialization {boolean, default: false} - disables leaf node serializers. The serializers validate the content of the field at runtime
so this option should only be set to true if there are strong assurances that the values are valid.
customSerializers {Object as Map, default: {}} - Replace serializer functions for specific types. Can be used as a safer alternative
for overly expensive serializers
customJSONSerializer {boolean, default: false} - Whether to produce also a JSON serializer function using fast-json-stringify. The default stringifier function is JSON.stringify
compiledQuery.query(root: any, context: any, variables: Maybe<{ [key: string]: any }>)
the compiled function that can be called with a root value, a context and the required variables.
compiledQuery.subscribe(root: any, context: any, variables: Maybe<{ [key: string]: any }>)
(available for GraphQL Subscription only) the compiled function that can be called with a root value, a context and the required variables to produce either an AsyncIterator (if successful) or an ExecutionResult (error).
compiledQuery.stringify(value: any)
the compiled function for producing a JSON string. It will be JSON.stringify unless compilerOptions.customJSONSerializer is true.
The value argument should be the return of the compiled GraphQL function.
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