I'm in love with None. Yes, Perl has "undef" but it isn't used much. In Python a variable can be equal to None, which is different than zero or not defined. I can default a parameter to None, and take action "if x is None". (that's valid Python. "is" is like equals, on...
不仅如此,两者的差距还在继续增长,Thompson NFA算法处理长度为100的字符串只需要不到200微秒,而Perl则需要超过10^15年。(Perl语言只是诸多语言的一个典例,其他包括Python、PHP或Ruby等更多语言的表现都是如此) 这可能非常令人难以置信,也许你在使用Perl的时候并没有发现它表现得如此糟糕。实际上,Perl在大多数情况下已...
a Perl program is almost as fast as a fully pre-compiled C language program. A plugin is available for some servers, such asApache, loading Perl permanently in memory. This reduces compile time and results in faster execution time of CGI Perl script. ...
Python is a platform-independent scripted language that comes with features to have complete access to operating system APIs. When compared with other programming languages, Python provides more run-time flexibility. The basic text manipulation facilities of Awk and Perl are also included in Python. ...
RE2 is a fast, safe, thread-friendly alternative to backtracking regular expression engines like those used in PCRE, Perl, and Python. It is a C++ library. - google/re2
(Perl语言只是诸多语言的一个典例,其他包括Python、PHP或Ruby等更多语言的表现都是如此) 这可能非常令人难以置信,也许你在使用Perl的时候并没有发现它表现得如此糟糕。实际上,Perl在大多数情况下已经足够快了,但是当我们拿出丧心病狂的正则表达式来测试Perl的时候,它可以变得异常的慢。相比之下,Thompson NFA算法并...
@bli It is still about 10% faster if you can work with bytes all the way through and then transfer to a string at the end. If you need to go string->bytes->string then it is about 25-30% slower than staying with strings
Due to the qualities noted above, the solution will have fewer bugs and be much faster to develop, and these are therealreasons to opt for Python over C for many tasks. I'm like David (except I sport much better Hawaiian shirts) in that I appreciate the pros associated with both langua...
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