In Go, we usually encounter two main ways to process and manipulate strings:Functions andtype. While both can implement formatting and concatenation of strings, they have some key differences in performance and usage.
1.
is a function that formats strings and parameter lists provided to format them into a string. This function is very convenient and can easily format various data types and generate strings.
name := "John"
age := 30
str := ("My name is %s and I'm %d years old", name, age)
(str)Output:
My name is John and I'm 30 years old
2.
is a type that provides a growing buffer to store strings, thus avoiding frequent string allocation and copy operations. useStrings can be constructed and manipulated efficiently, especially when strings need to be frequently appended, deleted, or modified.
var builder
("Hello")
(" ")
("World!")
str := ()
(str)Output:
Hello World!
3. Comparison
In terms of performance,Types are usually better thanfunction.
It is to use an incremental buffer internally to store strings, avoiding frequent string allocation and copying operations. It only incurs a small overhead when performing string operations. When the final string is needed, callString()This operation is also very efficient.
By comparison,Functions can incur some extra overhead when formatting and building strings. It needs to handle conversions of formatted strings and mutable parameters and may produce temporary string objects. When dealing with large numbers of strings, these overheads can accumulate, resulting in performance degradation.
While both can be used for string processing, in terms of performance,Usually better. If you need to frequently operate the string and generate the final string result, it is recommended to usetype.
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