Modern software performance is firmly in its “beyond parody” stage
I&#x27;d be so curious to get a window into the profiling, back-room discussions, etc. that happens at orgs like Slack and Teams. What&#x27;s going on here? What all did Teams just improve? What are the barriers they&#x27;re still running into?<p>I don&#x27;t want to be that person who says &quot;mrahhh a new CS graduate could have built Teams in 2002 and it would have been faster!&quot; But I&#x27;m also like, whatever is stopping it from being faster, I can&#x27;t imagine what that is from where I&#x27;m sitting!<p>I&#x27;ve built high-complexity, high-performance web apps, and while there are challenges (the smooth infinite scroll without any placeholders in the video was actually pretty slick), there are other things like 900ms to switch tabs and 9.1s to boot that are just really hard to believe (and those are the improved numbers!)<p>Some of it&#x27;s probably back-end; Slack for sure has back-end performance problems, where the UI is snappy but then sits there and loads the conversation for several seconds (or has synchronization problems, or loads an old version of history, or...). And I can understand having some performance challenge here- these apps deal with huge amounts of data per-workspace. But also... it&#x27;s very simple data. Mainly a series of messages, displayed in chronological order. That&#x27;s one of the most straightforward possible things to optimize.<p>I&#x27;m just so fascinated. The HN commentary around this topic is usually lazy, but there is a genuine mystery here.<p>Edit: A light overview of the new version was posted below (<a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=35352521" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=35352521</a>) but I&#x27;m linking it again here for visibility: <a href="https:&#x2F;&#x2F;techcommunity.microsoft.com&#x2F;t5&#x2F;microsoft-teams-blog&#x2F;microsoft-teams-advantages-of-the-new-architecture&#x2F;ba-p&#x2F;3775704" rel="nofollow">https:&#x2F;&#x2F;techcommunity.microsoft.com&#x2F;t5&#x2F;microsoft-teams-blog&#x2F;...</a>