With a response model, FastAPI will use Pydantic to serialize the data to JSON, without using intermediate steps, like converting it with `jsonable_encoder`, which would happen in any other case.

And under the hood, Pydantic uses the same underlying Rust mechanisms as `orjson` to serialize to JSON, so you will already get the best performance with a response model.

## Default response class { #default-response-class }

### Parallele Hamburger { #parallel-burgers }

Stellen wir uns jetzt vor, dass es sich hierbei nicht um „nebenläufige Hamburger“, sondern um „parallele Hamburger“ handelt.

Sie gehen los mit Ihrem Schwarm, um paralleles Fast Food zu bekommen.

Sie stehen in der Schlange, während mehrere (sagen wir acht) Kassierer, die gleichzeitig Köche sind, die Bestellungen der Leute vor Ihnen entgegennehmen.

github.com/ncw/directio
https://github.com/ncw/directio
----------------------------------------------------------------
Copyright (C) 2012 by Nick Craig-Wood http://www.craig-wood.com/nick/

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal

TT1 // VSBIQ T1, PH, CAR1, TT1 VSUBEUQM T2, ZER, CAR2, T2 // VSBIQ T2, ZER, CAR2, T2 VSEL TT0, T0, T2, T0 VSEL TT1, T1, T2, T1 // Reorder the bytes so STXVD2X can be used. // TT0, TT1 used for VPERM result in case // the caller expects T0, T1 to be good. XXPERMDI T0, T0, $2, TT0 XXPERMDI T1, T1, $2, TT1 STXVD2X TT0, (R0)(res_ptr) STXVD2X TT1, (R16)(res_ptr) RET #undef res_ptr #undef x_ptr #undef CPOOL #undef T0 #undef T1 #undef T2 #undef TT0 #undef TT1 #undef ZER #undef SEL1 #undef SEL2 #undef CAR1...

			withJSON:   `{ "person": [ { "Id": 1, "Name": "Anshu", "Address": "Templestowe", "Car": "Jeep" }, { "Id": 2, "Name": "Ben Mostafa", "Address": "Las Vegas", "Car": "Mustang" }, { "Id": 3, "Name": "Rohan Wood", "Address": "Wooddon", "Car": "VW" } ] }`,
		},
		{
			name:       "lower-case-is",
			query:      `select * from s3object[*] as s where s.request.header['User-Agent'] is not null`,