Why use/develop Guice, when You have Spring and Dagger?
<p>To my knowledge, Dagger does generate code, while Guice and Spring rely on runtime processing, thus Dagger works faster, but requires more work on programmer side. Because of performance edge it's good for mobile (Android) development.</p>

<p>However, when we are left with Guice and Spring, the latter has lots of integrations. What's the point of developing/using Guice, if we can use Spring Framework (that does basically same thing, but offers ex. easier database access)?</p>

<p>Isn't Google trying to reinvent wheel by creating their own DI tool, instead of using (and possibly contributing to) Spring Framework?</p>

<p>I am looking for decision tree, that guides through choosing DI tool.</p>