The root.tick.textures textures profiler section is not ended until the "mouse" section starts. But in between, there is a lot of GUI logic (for example, this.currentScreen.handleInput(), this.currentScreen.updateScreen()), so if a GUI is lagging, it would show up as root.tick.textures rather than root.tick.gui:
In Minecraft.runTick:
this.mcProfiler.endStartSection("textures");
if (this.world != null)
{
this.renderEngine.tick();
}
// Section should end here
if (this.currentScreen == null && this.player != null)
{
if (this.player.getHealth() <= 0.0F && !(this.currentScreen instanceof GuiGameOver))
{
this.displayGuiScreen((GuiScreen)null);
}
// ... much more GUI logic
Screenshot (after spamming the esc key to open and close the ingame menu) showing the importance of this ("gui (part 2)" is what was being included in "textures"):
are you saying that code is in vanilla to begin with why would removing this which shouldn't execute unless the player is dead fix anything? Or are you saying something else your really unclear here