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AnswerRe: Need Help with Optimizing My C# Code for Better Performance Pin
OriginalGriff31-May-24 2:39
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AnswerRe: Need Help with Optimizing My C# Code for Better Performance Pin
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AnswerRe: Need Help with Optimizing My C# Code for Better Performance Pin
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GeneralRe: Need Help with Optimizing My C# Code for Better Performance Pin
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GeneralRe: Need Help with Optimizing My C# Code for Better Performance Pin
Dave Kreskowiak8-Jun-24 6:42
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GeneralRe: Need Help with Optimizing My C# Code for Better Performance Pin
trønderen9-Jun-24 3:35
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GeneralRe: Need Help with Optimizing My C# Code for Better Performance Pin
Dave Kreskowiak9-Jun-24 4:08
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AnswerRe: Need Help with Optimizing My C# Code for Better Performance Pin
Rob Philpott4-Jun-24 2:00
Rob Philpott4-Jun-24 2:00 
A bit late to the party, but here are a few thoughts.

String manipulations are as you say possibly the most likely bottleneck. Strings are immutable in C# (they don't change), so if you concatenate two strings it involves copying the data from both of them into a new string. If you're doing this in a tight loop there's going to a lots of work (and garbage collection) involved. For building up strings, StringBuilder is the class of choice, and for substrings etc. you could look at Span<char>s (C# - All About Span: Exploring a New .NET Mainstay | Microsoft Learn.

If your files are large, take a streaming approach. For instance File.ReadAllLines() loads everything into memory where as File.ReadLines() returns an iterator where you just deal with the current line. Reading a massive file into memory often isn't a great idea.

With those in place, the only other thing I can think of is pipelining. Have one thread read the input file and present records via a queue to a processing stage which processes them and then submits them via a queue to a writing stage. All these stages can run concurrently. TPL dataflow is the thing for this.

Finally, if you are using Parallel processing for nested loops, make sure you do it on the outer loop. There is overhead in parallelising work and you get better performance that way.

It's all rather difficult to say without seeing the code!
Regards,
Rob Philpott.

GeneralRe: Need Help with Optimizing My C# Code for Better Performance Pin
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AnswerRe: Need Help with Optimizing My C# Code for Better Performance Pin
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