Strings and text

Question 1

Strings and text

Answer 1

In C#, all strings are immutable.

Question 2

Inefficient built-in string APIs

Answer 2

String.StartsWith, default culture	137
String.EndsWith, default culture	542
String.StartsWith, ordinal	115
String.EndsWith, ordinal	34
Custom StartsWith replacement	4.5
Custom EndsWith replacement	4.5

Question 3

Regular Expressions

Answer 3

While Regular Expressions are a powerful way to match and manipulate strings, they can be extremely performance-intensive. Further, due to the C# library’s implementation of Regular Expressions, even simple boolean IsMatch queries allocate large transient datastructures “under the hood.” This transient managed memory churn should be deemed unacceptable, except during initialization.

Question 4

XML, JSON and other long-form text parsing

Answer 4

Option 1: Parse at build time
Option 2: Split and lazy load
Option 3: Threads