|
It's a simple move from .Net 6.* to to .Net 8.* too... I feel sorry for those stuck in the .Net Framework world, they lose out on all of the performance improvements, in most cases, by simply switching and recompiling.
Graeme
"I fear not the man who has practiced ten thousand kicks one time, but I fear the man that has practiced one kick ten thousand times!" - Bruce Lee
|
|
|
|
|
Waaaa!
I'm stuck in the framework right now.
The difficult we do right away...
...the impossible takes slightly longer.
|
|
|
|
|
I recently made my Visual FA solution target the .NET Framework in addition to Core and Standard.
So I have VisualFA.csproj and VisualFA.DNF.csproj. The latter is the same project but for DNF. All the source files are linked via "Add as link" from the first project so I only have one copy. I then use a conditional compilation constant to add or remove the use of spans in code since .NET framework and as far as I can tell, VB.NET don't support them.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
|
|
|
|
|
VB.Net supports both frameworks. If you look at my most recent articles, here on CodeProject, I support C# & VB.Net on .Net Core & .Net Frsmework.
However, almost 12 months ago, there was a change. This Microsoft blog post explains: Update to the .NET language strategy - .NET Blog[^]
Graeme
"I fear not the man who has practiced ten thousand kicks one time, but I fear the man that has practiced one kick ten thousand times!" - Bruce Lee
|
|
|
|
|
I realize it supports both frameworks.
I'm saying it doesn't seem to support spans, and I don't think ReadOnlySpan is marked obsolete, but I haven't looked
'ReadOnlySpan(Of Char)' is obsolete: 'Types with embedded references are not supported in this version of your compiler.'.
Does not compile. I get the above
Private Function _BlockEnd0(ByVal s As ReadOnlySpan(Of Char), ByVal cp As Integer, ByVal len As Integer, ByVal position As Integer, ByVal line As Integer, ByVal column As Integer) As FAMatch
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
|
|
|
|
|
Yes, covered in that blog post. However, a C# facade library can address that limitation. Performace wise, VB.Net is just as fast as C# on both frameworks. My latest JSON Streaming[^] article has the benchmarks to prove it. That too uses ReadOnlySpan and ref strut with async/await. I mention the VB.Net limitation in the article.  Sadly, I think that the article was too much for most readers.
Graeme
"I fear not the man who has practiced ten thousand kicks one time, but I fear the man that has practiced one kick ten thousand times!" - Bruce Lee
|
|
|
|
|
That's great for your situation. In my current scenario this code was generated by a tool, and specifically designed to be able to produce dependency free code. I might actually consider the facade idea though for when it is opted to rely on the runtimes - right now the VB code can't under the newer frameworks unless you turn off spans in the compiled runtime itself - the build - not at runtime - it's conditionally compiled in. So that facade may fix that issue.
And yet otherwise in my tests, the spanless string approach i use (Substring instead of Splice) doesn't yield noticeably less performance. That leads me to suspect I'm not using it to its fullest - an encouraging thought in the big picture because it means I can get even more speed out of it. I'm not sure that's possible though because no matter how I think about approaching it a copy is always necessary by the time you hit the Value property off FAMatch. It's a head scratcher.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
|
|
|
|
|
Quote: And yet otherwise in my tests, the spanless string approach i use (Substring instead of Splice) doesn't yield noticeably less performance. That leads me to suspect I'm not using it to its fullest - an encouraging thought in the big picture because it means I can get even more speed out of it. I'm not sure that's possible though because no matter how I think about approaching it a copy is always necessary by the time you hit the Value property off FAMatch. It's a head scratcher.
Without knowing specifics, it is difficult to comment.
That article is about dealing with gigabytes of data using streams efficiently keeping allocations to a minimum. There was a lot of research, trial & error done to find the best optimal solution. I even looked at the source code of Microsoft's latest (At the time) .Net Core. Renting ReadOnlyMemory<t>[^] was not suitable as all memory blocks needed to be of the same size otherwise nulls fill the gaps. This is not documented anywhere! And I did look. That was a real headscratcher at the time.
Don't get me started on ref strut in an asynchronous environment...
I'm sure if you take a step back, do a bit of research, experimenting, digging into the Microsoft code, you will find a solution.
Graeme
"I fear not the man who has practiced ten thousand kicks one time, but I fear the man that has practiced one kick ten thousand times!" - Bruce Lee
|
|
|
|
|
I feel like it might be chasing ghosts, particularly since I already get really great performance out of the thing, especially compared to .NET Regex even though that always uses ReadOnlySpan. I still beat it by 3x in the best case.
Microsoft Regex "Lexer": [■■■■■■■■■■] 100% Found 220000 matches in 35ms
Microsoft Regex compiled "Lexer": [■■■■■■■■■■] 100% Found 220000 matches in 20ms
FAStringRunner (proto): [■■■■■■■■■■] 100% Found 220000 matches in 7ms
FATextReaderRunner: (proto) [■■■■■■■■■■] 100% Found 220000 matches in 13ms
FAStringDfaTableRunner: [■■■■■■■■■■] 100% Found 220000 matches in 10ms
FATextReaderDfaTableRunner: [■■■■■■■■■■] 100% Found 220000 matches in 14ms
FAStringStateRunner (NFA): [■■■■■■■■■■] 100% Found 220000 matches in 145ms
FAStringStateRunner (Compact NFA): [■■■■■■■■■■] 100% Found 220000 matches in 43ms
FATextReaderStateRunner (Compact NFA): [■■■■■■■■■■] 100% Found 220000 matches in 48ms
FAStringStateRunner (DFA): [■■■■■■■■■■] 100% Found 220000 matches in 11ms
FATextReaderStateRunner (DFA): [■■■■■■■■■■] 100% Found 220000 matches in 16ms
FAStringRunner (Compiled): [■■■■■■■■■■] 100% Found 220000 matches in 7ms
FATextReaderRunner (Compiled): [■■■■■■■■■■] 100% Found 220000 matches in 12ms
7ms is about what I get compared to microsoft's 20 if I'm making the fairest comparison possible (apples vs apples) 'cept mine doesn't backtrack or support a bunch of fluff. (though it lacks anchors  )
If I can't get another 10% out of this I don't think it's worth the trouble.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
|
|
|
|
|
That is impressive.
Have you seen the latest updates to RegEx? Regular Expression Improvements in .NET 7 - .NET Blog[^] ... Source Generators for RegEx are next level!
I would dig into the source code for the changes to the RegEx and the Source Generator for RegEx and see how they do it to get ideas for yours.
Quote: If I can't get another 10% out of this I don't think it's worth the trouble.
I hear you, and for a one-off can agree, however, you will need to understand that last 10% for future projects. The question is now or then?
Graeme
"I fear not the man who has practiced ten thousand kicks one time, but I fear the man that has practiced one kick ten thousand times!" - Bruce Lee
|
|
|
|
|
I actually did dotNetPeek them which is how I figured out the Span stuff. I don't like their code. Frankly, I'm impressed with the code-synthesis but they still made it hard to follow, and I'm not sure if that's so beneficial. My code looks machine generated, but it's easy to follow, as state machines go:
private FAMatch _BlockEnd0(ReadOnlySpan<char> s, int cp, int len, int position, int line, int column) {
q0:
if ((cp == 42)) {
this.Advance(s, ref cp, ref len, false);
goto q1;
}
goto errorout;
q1:
if ((cp == 47)) {
this.Advance(s, ref cp, ref len, false);
goto q2;
}
goto errorout;
q2:
return FAMatch.Create(0, s.Slice(position, len).ToString(), position, line, column);
errorout:
if ((cp == -1)) {
return FAMatch.Create(-1, s.Slice(position, len).ToString(), position, line, column);
}
this.Advance(s, ref cp, ref len, false);
goto q0;
}
private FAMatch NextMatchImpl(ReadOnlySpan<char> s) {
int ch;
int len;
int p;
int l;
int c;
ch = -1;
len = 0;
if ((this.position == -1)) {
this.position = 0;
}
p = this.position;
l = this.line;
c = this.column;
this.Advance(s, ref ch, ref len, true);
if ((ch == 47)) {
this.Advance(s, ref ch, ref len, false);
goto q1;
}
goto errorout;
q1:
if ((ch == 42)) {
this.Advance(s, ref ch, ref len, false);
goto q2;
}
goto errorout;
q2:
return _BlockEnd0(s, ch, len, p, l, c);
errorout:
if (((ch == -1)
|| (ch == 47))) {
if ((len == 0)) {
return FAMatch.Create(-2, null, 0, 0, 0);
}
return FAMatch.Create(-1, s.Slice(p, len).ToString(), p, l, c);
}
this.Advance(s, ref ch, ref len, false);
goto errorout;
}
Main thing that makes it tough is the use of UTF-32 codepoints instead of chars - necessary for surrogate handling in a seamless manner. I originally used char literals for the transitions but that was incompatible with VB.NET source generation. Frankly, VB.NET is an utter curmudgeon in terms of what it will accept and I hate creating language agnostic code templates that can target it. I always ALWAYS have to massage them for VB.NET. 
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
|
|
|
|
|
Quote: I actually did dotNetPeek them
In my experience, I have found peeking and looking at the actual source code is not always the same thing. The compiler tends to optimise and rewrite code these days...
Graeme
"I fear not the man who has practiced ten thousand kicks one time, but I fear the man that has practiced one kick ten thousand times!" - Bruce Lee
|
|
|
|
|
In that case I wasn't as interested in the source code as I was in the final code. I was looking for optimization opportunities, and I was looking at the IL as well and comparing it to mine.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
|
|
|
|
|
I missed the bottom line of your post. I'll respond here.
Well, this 10% is for a library, so it kind of changes the calculus of it somewhat. The 10% has a multiplier effect based on how popular the library gets, if that makes sense.
I don't think the 10% would make the code that much more confusing unless it also forces me to do something to it I am unwilling to anyway. I am not looking for a total remodel at this stage given the stability and performance numbers I have.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
|
|
|
|
|
Having written .Net enumerators, yes, it can be slow. It can also be a very powerful abstraction when used properly. Linq on the other hand, is a nightmare to write in VB. C# supports the Lambda syntax while VB doesn't. Personally, most Linq uses can easily be rewritten as a for loop which is easier to read and understand. Some require a function call, but then so do all Linq statements.
|
|
|
|
|
Yeah, and it's not like there aren't developers that that have sweated over how to make that particular segment of code as fast as they can. There is a crap ton of flexibility built into IEnumerable that would be difficult to optimize away.
I worked on a project years back where that level of optimization made a big difference, and I still used the convenience of LINQ group by, distinct, orderby, etc. to build up hashtables that I used in the optimized sections of code I wrote. Using LINQ helped in the part it was good at.
|
|
|
|
|
From CP newsletter.
the rust project has a burnout problem[^]
The author is lamenting that some developers on Rust are suffering from burnout. And then describing an environment where new contributors either have no mentor or the mentor leaves.
When I read that I think so what?
Seems like a description of almost everything. Certainly every company I have worked for. Only time that didn't happened was when the company went bankrupt before those working there got tired.
When I look for new libraries I look for robust user communities because I have used libraries before where there were few or even one developer. Props for the continued support but for long term use even popular libraries have suffered from reduced support.
I have even seen that at night clubs and restaurants. First two years after they open you can't get in the door. 2 years later they have shut the door. (Actually I think I know of a promoter/company that specifically relies on that model.)
|
|
|
|
|
Bad naming. Just the other day, I broke through a mental fog by renaming some modules, methods, etc. to better reflect what they were doing. I'm now wheeling and rotating and charging and following when before I was just "moving".
"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I
|
|
|
|
|
What probably doesn't help is that among developers, especially young developers, there is a certain mindset.
Burning midnight oil, working stupid hours, often unpaid, is considered some sort of flex.
I see this in corporate environments as well: the people most likely to burn out are those who do not set boundaries and want to solve everything / feel responsible for everything. The people most likely to last are the ones who like their job but at the end of their shift say: the rest can wait till tomorrow.
|
|
|
|
|
There's yet another article on Slashdot claiming Bing's market share has barely budged despite ChatGPT being added to it, and initially being a big hit, yada-yada.
And yet barely 2 days prior, another article read, "Google Search Really Has Gotten Worse, Researchers Find". I've been seeing those sorts of articles time and again over the last few months. I can't say whether that's true. I try to do as little as possible with Google nowadays.
I've actually been doing my searches through Bing for a few years now, using Edge (since it moved to the Chromium engine), and frankly, it's a rare occurrence where I can't find what I'm looking for within the first few results of a query. Generally if I can't find anything on Bing, Google really doesn't fare quantifiably "better".
And MS already has all the information it wants from me, if not through my search queries and browser telemetry, then through telemetry sent by the OS itself. If Google's search results truly are getting worse (not my claim), I'm not sure why they should still be in my life. Frankly if my data's gonna get collected anyway, I'd rather have one company have it then two. Especially when one of them is purely an advertising company (whereas the other is merely trying to move in that direction, despite failing repeatedly - and the company's very survival doesn't rely on its ad department).
Nobody it seems ever misses a chance to ridicule Edge or Bing. Laugh all you want, I'm actually rather happy with how it's working out for me.
Obviously, YMMV. So what say you? Are Google's results getting as unusable as some claim? If so, why stick with it?
|
|
|
|
|
Hmm, the Quote button doesn't seem to be working. Aanywaayy...
Are Google's results getting as unusable as some claim?
I have no idea; I've never used it.
|
|
|
|
|
Hmm, the Quote button doesn't seem to be working.
I've noticed that...the button is there, clicking on it doesn't do anything except for removing the highlight. So, I've been manually copying and pasting, and then adding a ">" before the pasted line.
The hamsters must be acting up.
|
|
|
|
|
Are Google's results getting as unusable as some claim?
Yes. Very much yes when you are looking for specific information, or trying to recall an article you read a while ago. Their verbatim search used to be the bees knees, or however the saying goes. Even it sucks now. And has for about at least a year.
|
|
|
|
|
If you've never used it why comment? Or is this some new nerd virtue signal?
|
|
|
|
|
I'm a creature of habit. I've been using Google search so long, I forget Bing is there. I'm a Firefox guy for my browser. I find what I'm looking for so I'm not worried. Maybe if you're searching eccentric stuff it matters. But for boring stuff like "Where to buy a 16" husky chainsaw" Google does just fine for me.
Hogan
|
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
