In the first paragraph: > graphql-jit leverages this behaviour of V8 optimization by compiling the queries into functions to significantly improve performance

In the first paragraph: > graphql-jit leverages this behaviour of V8 optimization by compiling the queries into functions to significantly improve performance and https://github.com/zalando-incubator/graphql-jit#compile-a-query https://github.com/zalando-incubator/graphql-jit#compile-a-q... so I guess the difference is instead of having totally generic functions that parse the query every time, instead you can call a factory function up front to get a specialised function for a particular query and V8 JIT can make that faster