Perl 字符串的性能

Question

我已经遇到了很多 Perl 代码，它们以这种方式分解长字符串:

my $string = "Hi, I am a very long and chatty string that just won't";
$string .= " quit.  I'm going to keep going, and going, and going,";
$string .= " kind of like the Energizer bunny.  What are you going to";
$string .= " do about it?";

从我的 Java 背景来看，构建这样的字符串将是一个性能禁忌。 Perl 也是这样吗？在我的搜索中，我使用 join 阅读了该内容。在字符串数组上是连接字符串的最快方法，但是当您只想拆分字符串以提高可读性时怎么办？是否更好地写:

my $string = "Hi, I am a very long and chatty string that just won't" .
    " quit.  I'm going to keep going, and going, and going," .
    " kind of like the Energizer bunny.  What are you going to" .
    " do about it?";

或者我使用 join ，或者应该怎么做？

Answer 1

Camel book, p 598 :

Prefer join("", . ..) to a series of concatenated strings. Multiple concatenations may cause strings to be copied back and forth multiple times. The join operator avoids this.