Criteria | GUIDs | Seq. GUIDs | BIGINT | INT |
Storage | 16 bytes | 16 bytes | 8 bytes | 4 bytes |
Insert/Update performance | Slowest | Comparable but the index keys are larger in size. For wider tables, this would be slower than Integer values. | Faster than sequential GUIDs | Fastest |
Hotspot contention | Very rare | Yes | Yes | Highest, due to smaller size of RIDs |
Fragmentation/Page Splits | High | Minimal | Minimal | Minimal |
JOIN Performance/SORT operations | Least performance (Rank 4 = Least performance) | Better than random GUIDs due lesser fragmentation (Rank: 3) | High performance (Rank: 2) | High Performance (Rank: 1) |
Logical reads | Rank 4=Highest | Rank 3 | Rank 2 | Rank 1=Least |
Merging data across servers | Beneficial | Beneficial | Difficult | Difficult |
Uniqueness | Rare chance of duplicates | Globally unique. Virtually no chance of collisions | Limited by range of BIGINT | Limited by range of INT |
کتاب رایگان Go Succinctly
The Go programming language is relatively small and concise, but its depth makes it an ideal option for solving modern-day development problems. In Go Succinctly, author Mark Lewin guides readers through the basics of Go, and he provides documentation and resources that allow users to dive into the language and learn it for themselves. By the end of the book, novices and experienced programmers alike will be conversant in a language quickly gaining traction around the world.
- Welcome
- Introducing Go
- Let’s Go!
- Variables, Constants, and Assignments
- Basic Data Types
- Control Structures
- Arrays, Slices, and Maps
- User-Defined Types
- Concurrency
- Standard Packages
- Go Further
Fill and FillByObject
/// <summary> /// Insert values from an object into a string pattern. To specify the object's property you have to use the '{propertyName}'. /// </summary> /// <remarks> /// This method is a replacement to String.Format, but it has two differences: /// <list type="simple"> /// <item>It reverese the order you call the functionality, instead of writing String.Format(pattern, args) you write pattern.FillByObject(args). This makes the code look cleaner.</item> /// <item>You supply the pattern with an object and specify insertion points by property names.</item> /// </list> /// <example> /// <![CDATA[ /// "First name:{firstName}, Sur name:{Surname}".FillByObject(new {firstName = "Sam", lastName="Naseri"}); /// ]]> /// </example> /// </remarks> /// <seealso cref="Fill"/> /// <typeparam name="T">Type of bindingValue.</typeparam> /// <param name="bindingPattern">The pattern to fill.</param> /// <param name="bindingValue">The object providing values to fill in the pattern.</param> /// <returns>The pattern filled with values.</returns> public static string FillByObject<T>(this string bindingPattern, T bindingValue) { var properties = GetProperties(typeof(T)).ToList(); var values = properties.Select(property => property.GetValue(bindingValue, new object[] { })).ToList(); var result = bindingPattern; for (int index = 0; index < properties.Count; index++) { var property = properties[index]; var propPattern = "{" + property.Name + "}"; var old = result; result = result.Replace(propPattern, values[index] != null ? values[index].ToString() : ""); } return result; }
private static IEnumerable<PropertyInfo> GetProperties(Type t) { return t.GetProperties(BindingFlags.Public | BindingFlags.Instance); }
/// <summary> /// A simple replacement for String.Format which only makes the codes look nicer. /// </summary> /// <param name="pattern">The source string that you want to replace insertion points on it.</param> /// <param name="args">Values to be replaced in the pattern.</param> /// <returns></returns> public static string Fill(this string pattern, params object[] args) { return string.Format(pattern, args); }
Visual Studio 2022 17.2 منتشر شد
This release brings continued improvements to the C# and .NET experiences, new Git performance and experiences, updates for C++ developers, and new Azure tools for local development and deployment. We also continue to address your direct feedback submitted via Developer Community, addressing over 400 feedback items in this release! You can see the broader list of community feedback addressed in releases by visiting the fixes page on Developer Community.