c# - 连接字符串的最有效方法？

Question

连接字符串的最有效方法是什么？

Answer 1

Rico Mariani ，.NET 性能大师，拥有 an article在这个问题上。这并不像人们想象的那么简单。基本建议是这样的:

If your pattern looks like:

x = f1(...) + f2(...) + f3(...) + f4(...)

that's one concat and it's zippy, StringBuilder probably won't help.

If your pattern looks like:

if (...) x += f1(...)
if (...) x += f2(...)
if (...) x += f3(...)
if (...) x += f4(...)

then you probably want StringBuilder.

Yet another article to support this claim来自 Eric Lippert，他详细描述了对单行 + 连接执行的优化。