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[Bug 1251275] Re: UnityScreen::nuxPrologue / UnityScreen::nuxEpilogue are unnecessary expensive

To: dx-packages@xxxxxxxxxxxxxxxxxxx
From: "Stephen M. Webb" <stephen.webb@xxxxxxxxxxxxx>
Date: Thu, 03 Apr 2014 01:57:12 -0000
Reply-to: Bug 1251275 <1251275@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Fix Released in Unity Unity 7.2.0.

** Changed in: unity
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1251275

Title:
  UnityScreen::nuxPrologue / UnityScreen::nuxEpilogue are unnecessary
  expensive

Status in Unity:
  Fix Released
Status in “unity” package in Ubuntu:
  Fix Released

Bug description:
  According to cachegrind, the most expensive calls we have in unity are
  UnityScreen::nuxPrologue and UnityScreen::nuxEpilogue due to their
  gl{Push,Pop}Attrib calls which are quite slow (at least with mesa
  drivers).

  This are huge workarounds to prevent issues that we can actually fix
  in a different way.

  See attached screenshot to visualize this issue.

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