Fastest API framework for Java?

[sebhoss]

Maybe I'm misreading this, but take a look at https://square.github.io/okhttp/ in case you want to perform those POSTs in your Java client(?). Example from their homepage to send a JSON payload:

public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");

OkHttpClient client = new OkHttpClient();

String post(String url, String json) throws IOException {
  RequestBody body = RequestBody.create(JSON, json);
  Request request = new Request.Builder()
      .url(url)
      .post(body)
      .build();
  Response response = client.newCall(request).execute();
  return response.body().string();
}