RFR: 8273355: Lanai: Flickering on tooltip appearance IntelliJ IDEA 2021.2.1

[Sergey Bylokhov]

On Fri, 10 Sep 2021 18:50:31 GMT, Alexey Ushakov <avu at openjdk.org> wrote:

> Yes, to blit the content we just start DisplayLink. So, definitely there is some lag between window appearance and the drawing of the layer.

If that lag is visible by the human, and so different from the OGL, means that we should enhance our performance testing for Lanai. As far as I remember that tests report better performance than OGL, is it possible that for Metal the perf tests just skip the rendering phase and did not wait for a DisplayLink callback? 

Probably we can force metal to draw some initial surfaces w/o using DisplayLink?

-------------

PR: https://git.openjdk.java.net/jdk/pull/5373