// load key and cert files.
	if err := os.WriteFile(certFile, testcerts.ServerCert, 0o644); err != nil { // nolint: vetshadow
		t.Fatalf("WriteFile(%v) failed: %v", certFile, err)
	}
	if err := os.WriteFile(keyFile, testcerts.ServerKey, 0o644); err != nil { // nolint: vetshadow
		t.Fatalf("WriteFile(%v) failed: %v", keyFile, err)
	}

	if err := os.WriteFile(caFile, testcerts.CACert, 0o644); err != nil { // nolint: vetshadow

this release is **compatibility** with Pydantic v1 and v2, to make sure your current apps keep working. Later there will be more focus on refactors, correctness, code improvements, and then **performance** improvements. Some third-party early beta testers that ran benchmarks on the beta releases of FastAPI reported improvements of **2x - 3x**. Which is not bad for just doing `pip install --upgrade fastapi pydantic`. This was not an official benchmark and I didn't check it myself, but it's a good sign....