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A comment on Allocation is cheap in .NET until it is not. Parent comment

Re:Allocation is cheap in .NET until it is not by kbsletten on Wednesday January 24, 2018 @02:49PM (#16225705)
I know this was changed recently-ish in Java, but I hadn't heard of anybody doing the old substring trick in .NET, do you know when they cut over?
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Re:Allocation is cheap in .NET until it is not by matthewwarren on Wednesday January 24, 2018 @03:19PM (#16225940)
AFAIK this trick was never possible in .NET because Substring always 'deep copied' the relevant data into a completely new string
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Re:Allocation is cheap in .NET until it is not by kkokosa on Wednesday January 24, 2018 @02:58PM (#16225760)
There is a lot of good things going on in .NET Core about this. Here is a good description of Span: http://adamsitnik.com/Span/#slicing-without-managed-heap-all...
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Re:Allocation is cheap in .NET until it is not by kevingadd on Wednesday January 24, 2018 @06:04PM (#16227184)
Regex's implementation in the standard library used to do this, and I think maybe still does. Bonus points because they leaked a reference to the last string you ran a regex against (????) so if it was big you'd just eat up 50 mb of heap for a while.
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