[smush]

Is it OS and SDK bloat? Where do you think most of the cruft is coming from?

Let's say I had a given LOB application written in vb6, c#.net winforms, heck, maybe even WPF. All single-threaded.

If I re-wrote the same application (features, UI, still single-threaded) in native Win32, would that improve the latency?

[kungtotte]

Who knows? My hunch is there's two main factors influencing this. The first is that constraints breed creativity. If you know you only have 133MHz on a single CPU you squeeze as as possible much out of every cycle, on modern CPUs what's a few thousand cycles between friends?

The second is SDK/framework/etc. bloat, which is probably influenced by the first. With excess cycles you don't care if your tools start to bloat.

I think it's primarily an issue of attitude. If you want to write fast software you'll do it, regardless of the circumstances. It all starts with wanting it.

[Arnt]

Think harder.

I worked on a framework in the nineties and did such things as render letters to pixels. Here are some of the optimisations we did then, compared to now:

We used much lower output resolution.

We used integer math instead of floating point, reducing legibility. How paragraphs were wrapped depended on whether we rendered it on this monitor or that, or printed it.

We used prescaled fonts instead of freely scalable fonts for the most important sizes, and font formats that were designed for quick scaling rather than high-quality results. When users bought a new, better monitor they could get worse text appearance, because no longer was there a hand-optimised prescaled font for their most-used font size.

We used fonts with small repertoires. No emoji, often not even € or —, and many users had to make up their minds whether they wanted the ability to type ö or ø long before they started writing.

Those optimisations (and the others ­— that list is far from complete) cost a lot of time for the people who spent time writing code or manually scaling fonts, and led to worse results for the users.

I think you're the kind of person who wouldn't dream of actually using anything other than antialiased text with freely scalable fonts and subpixel interletter space. You just complain that today's frameworks don't provide the old fast code ­that you wouldn't use and think develpers are somehow to blame for not wanting to write that code.