Re: tab-line-tab-modified: cool feature... not yet there

[Juri Linkov]

>> > Thanks, now everything is clear.  The problem is that it changes the color
>> > of the tab only after you switch to another buffer.  I don't know whether
>> > the author Adam (Cc'ed) intended this.  It makes sense not to change
>> > the color of the current tab immediately to not distract the user.
>>
>> I don’t know if changing the colour in the tab distracts or confuses. At
>> least it seems to confuse me ;-) I would expect the tab to change at the
>> same time as the mode-line in order to have consistent information on the
>> screen. I don’t like to be told different things by the tab line and the
>> mode line ;-)
>
> The patch I submitted doesn't have any effect on how or when the
> tab-line is updated.  I've also noticed the effect you describe, that
> the tab-line doesn't update until I change to another buffer, but ISTM
> that that's an orthogonal issue.  The tab-bar does update with
> redisplay, while the tab-line seems to only update on buffer-switch,
> or something like that.  If the tab-line should update with redisplay,
> I guess that could be done.  I guess it might be relevant to redisplay
> performance, but Juri should know about that; maybe that's why it
> doesn't already do that.

Indeed, it's related to redisplay performance, so it was optimized by caching
to update the tab-line only on buffer switching, not on every key press.