This is a great talk. I just gave an internal talk on Performance Engineering where I went over BenchmarkDotNet and how I use it to optimize certain algorithms. I also went over the role of microbenchmarking on refactoring designs to be more performant. Needless to say, this talk went over really well. I got this notification on KZbin after I gave my talk so I decided to distribute it internally. Again, excellent talk.
@joechang86964 жыл бұрын
What I would like is for certain objects, typically larger ones, to get an virtual address of some granular size, and allocate from its own set of pages. On dispose, both the VAS and memory pages can be easily recycled. To a degree, this would be like SQL Server, which makes extensive use of 8KB pages. This make it difficult to handle large objects. Hence, for C# at 64-bit, we would like to allocate large chunks of VAS, memory in regular (4K), large pages (2M) or even huge.
@kevinlettier52734 жыл бұрын
Great talk, very informative. The optimized code is really different from the original one and it seems that when you start through that way you cannot easily come back, so to use with care as you mentioned and on critical path. I would love to see on next talk how you can conciliate self documenting approach of the original code and the performance of the optimized one, maybe by decoupling the concrete processing from the orchestration flow ?
@elerius24 жыл бұрын
29:30 Spans in async methods. They should improve the compiler to allow span in async so long as the usage of the span doesn't overlap an async operation. I understand the workaround isn't that difficult, but it "feels bad" to factor the usage out into a separate method. Even if it required introducing an explicit scope to contain the span, it would be an improvement.
@philipmrch83264 жыл бұрын
I agree, I've thought about this solution too.
@clearlyunwell4 жыл бұрын
Excellent, thank you!
@MrMichaeljosiah4 жыл бұрын
Really good presentation. Very informative
@GordonGEICO3 жыл бұрын
"... you'll end up with a StackOverflowException and then you'll end up on Stack Overflow trying to work out why." Which will, inevitably, lead to your question getting closed for being a duplicate, even though none of the links to the (completely unnecessary) third party libraries work because the projects were abandoned long ago.
@GeorgeTsiros3 жыл бұрын
SO is a disaster. The SNR is too low.
@karldavis7392 Жыл бұрын
I try to group questions asked of the user together. Let's say I have five questions, and need five seconds of processing to handle each. If I ask all five questions back-to-back, then do 25 seconds of processing, the user feels it's faster, because they can go do something else instead of waiting for the app.
@slavimo3 жыл бұрын
Instead of String.Join() you could have use StringBuilder instead to get rid of those allocations. So the comparison of String.Join vs StringBuilder vs Span is lacking in your example, IMO.
@axedaddy14 жыл бұрын
And we get all this functionality for three.
@Adiounys4 жыл бұрын
31:45 - is testing index before replacing really faster? It seem like it's searching for the space twice.
@default6324 жыл бұрын
Test
@Adiounys4 жыл бұрын
@@default632 Well I just did. Here are my results 00:00:04.4693173 replace 00:00:06.2901262 indexReplace 00:00:01.6881407 replace[NoSpace] 00:00:01.6519704 indexReplace[NoSpace] 00:00:09.3153027 Replace[LastSpace] 00:00:09.2847721 indexReplace[LastSpace] 00:00:09.3679662 Replace[FirstSpace] 00:00:09.3879821 indexReplace[FirstSpace] 00:00:10.1380442 Replace[long] 00:00:10.0772212 indexReplace[long] And here are input strings I used: testedMethods = new List{ ("replace", ()=>replaceTest("ab cd")), ("indexReplace", ()=>indexReplaceTest("ab cd")), ("replace[NoSpace]", ()=>indexReplaceTest("abcd")), ("indexReplace[NoSpace]", ()=>indexReplaceTest("abcd")), ("Replace[LastSpace]", ()=>indexReplaceTest("Soiqpbiosdssdadsatoeigsdawdqdsadqwcx ")), ("indexReplace[LastSpace]", ()=>indexReplaceTest("Soiqpbiosdssdadsatoeigsdawdqdsadqwcx ")), ("Replace[FirstSpace]", ()=>indexReplaceTest(" Soiqpbiosdssdadsatoeigsdawdqdsadqwcx")), ("indexReplace[FirstSpace]", ()=>indexReplaceTest(" Soiqpbiosdssdadsatoeigsdawdqdsadqwcx")), ("Replace[long]", ()=>indexReplaceTest("Soiqpbiosdssdadsat oeigsdawdqdsadqwcx")), ("indexReplace[long]", ()=>indexReplaceTest("Soiqpbiosdssdadsat oeigsdawdqdsadqwcx")), };
@lollo47114 жыл бұрын
since every cpu-tick counts (money) on cloud computing/hosting those aspects really come (back) into consideration (for years I lost overview/interest how 'fast' my code (really) runs and how much it consumes [on fat clients])
@odee20044 жыл бұрын
How did they get the "not equal" and "less than equal" using only one text/char in Visual studio? @33:25
@neutralenull3 жыл бұрын
Using a different font like firacode
@belowasmelashgebremariam2 жыл бұрын
Blow
@Geoters4 жыл бұрын
At 34:39 code line 117 has c != ' ' but it looks much different. What kind of sorcery is that and how can i do it??
@WilliamSandersAu4 жыл бұрын
Had a quick look into this, apparently you have to install a font into Visual Studio that supports ligatures (e.g. Fira Code).
@Roy1924 жыл бұрын
There's also a version of consolas that has ligatures: github.com/somq/consolas-ligaturized Just remember to restart visual studio after changing the font.
@GeorgeTsiros3 жыл бұрын
@@WilliamSandersAu screw fira code. go with ubuntu mono ligaturized
@mottahh41624 жыл бұрын
wouldn't using a span with strings, if we changed the original string the span will also be changed, also, a slice of a span will be effected by the changes done on the original span
@dongbinrabbit4 жыл бұрын
strings are immutable and strings can only be converted to readonly spans.
@CodeWithSteve4 жыл бұрын
@@dongbinrabbit Yep exactly!
@focl20034 жыл бұрын
What is the font he's using?
@ayoubihbibibi24044 жыл бұрын
Same question !!!!!
@focl20034 жыл бұрын
@@Flynnor thank you, I'll check it out.
@Adiounys4 жыл бұрын
I know Codist can make similar looks marketplace.visualstudio.com/items?itemName=wmj.Codist
@jr.BoarOfGold4 жыл бұрын
He's using Fira Code
@belowasmelashgebremariam2 жыл бұрын
Baelley
@belowasmelashgebremariam2 жыл бұрын
Below
@belowasmelashgebremariam2 жыл бұрын
Kofeley
@belowasmelashgebremariam2 жыл бұрын
ASME blow
@belowasmelashgebremariam2 жыл бұрын
Wellekey
@CarrotCakeMake4 жыл бұрын
So it is a slice in Rust.
@belowasmelashgebremariam2 жыл бұрын
Allo
@belowasmelashgebremariam2 жыл бұрын
Ettay konney
@belowasmelashgebremariam2 жыл бұрын
Jegna
@belowasmelashgebremariam2 жыл бұрын
Gotta
@belowasmelashgebremariam2 жыл бұрын
Hubbeny
@belowasmelashgebremariam2 жыл бұрын
Wanna Eye
@belowasmelashgebremariam2 жыл бұрын
Kemey
@belowasmelashgebremariam2 жыл бұрын
Kemey me ziarikey
@belowasmelashgebremariam2 жыл бұрын
Sllestiom nattey
@minnedanhieux8835 ай бұрын
Nice talk... but comming from c++... meh.
@belowasmelashgebremariam2 жыл бұрын
Eweniy
@belowasmelashgebremariam2 жыл бұрын
Kemey ke
@belowasmelashgebremariam2 жыл бұрын
Nattey
@belowasmelashgebremariam2 жыл бұрын
Ewe
@Esico64 жыл бұрын
.net is pretty fast out of the box but if you want performance dont use it. .net will work against you. It can be done but too much workarounds and .net GC tuning. Never use linq on areas where u need perf.
@hichamo-sfh1774 жыл бұрын
I don't think so Because linq still highly performance than using a loop and if statements ..
@ahives4 жыл бұрын
Hmm. Just curious, have you ever built critical healthcare systems that operate at scale before? I co-maintain the most performant healthcare parser in the world that executes in nanoseconds/microseconds and it uses LINQ and other functional programming concepts. In my experience your statement is not valid. If you are curious, here it is github.com/MassTransit/Machete.
4 жыл бұрын
.net is pretty fast out of the box but if you want performance dont use it
4 жыл бұрын
@@hichamo-sfh177 Take a look : github.com/microsoft/referencesource/blob/master/System.Core/System/Linq/Enumerable.cs Why do you think it is faster than loop and if statements if they are just that?