Why is string.IsNullOrEmpty faster than comparison?
103417
Why is String.IsNullOrEmpty faster than String.Length?
147409
String.equals versus ==
38780
Checking for null before ToString()
89746
What is performance of ContainsKey and TryGetValue?
57211
Is "else if" faster than "switch() case"?
138518
Why is one string greater than the other when comparing strings in JavaScript?
74620
is the + operator less performant than StringBuffer.append()
46562
Differences in string compare methods in C#
39781
Why does the is operator return false when given null?
33398
C# difference between == and Equals()
147362
Is ternary operator, if-else or logical OR faster in javascript?
134742
String comparison in Python: is vs. ==
11189
'is' operator behaves differently when comparing strings with spaces
1469
Is there a difference between "==" and "is"?
152733
How to simplify a null-safe compareTo() implementation?
36929
Why does comparing strings using either '==' or 'is' sometimes produce a different result?
144960
Why is Javascript's "in" operator consistently slower than strict member comparison to undefined?