Laravel vs Yii vs Symfony for a speed-demanding project?

Question

PHP

It is not necessary to climb with another language.
PHP only.
And in general it is interesting to read what goals each framework pursues.

Answer 1

You need to write good code for a project that requires speed.
The difference in speed of an empty framework out of the box will become insignificant as soon as you write the first lines of your code with business logic.

Answer 2

Laravel vs Yii vs Symfony for a speed-demanding project?

Generally speaking for speed - not php.
For small projects - yii. For medium and large - Symfony. Laravel - I strongly do not recommend it (alas, this framework is a hodgepodge of anti-practices).
But it all depends on the specific task. The fact is that the framework should help you in writing the application. The same Lumen is essentially a router with helpers, Silex - roughly speaking yes, only these helpers are Symfony components. If this is enough for you - feel free to touch Silex.

Answer 3

Do you want speed? Then you need this - https://phalconphp.com/