Talk about the current status, prospects and opportunities of waste reduction

C# Performance optimization details 1. Use string.Empty to assign an initial value to an empty string variable. String.Empty is a reference, and "" is a specific implementation string filter="";//Not recommended ​ string filter=string.Empty; //Suggestion 2. Use str.Length == 0 to make an empty string. The fastest way: if (str.Length == 0) Secondly: if (str == String.Empty) or if ( str == "") 3. Avoid unnecessary string operations such as ToUpper and ToLower. Methods such as ToUpper and ToLower will regenerate string pairs. String.Compare can ignore string case // Not recommended writing method if(s1.ToUpper()==s2.ToUpper()) …; //Recommended writing method if(String.C

1. C# String operation--reduce garbage collection pressure

Introduction: If you want to construct a longer string, especially when splicing more than 10 times (experience value), you should use StringBuilder for string splicing

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