我是一个业余程序员，在这两种语言上我都是“平均”。 我发现编写快速Fortran代码比编写C(或c++)代码更容易。Fortran和C都是“历史悠久”的语言(按照今天的标准)，被大量使用，并且很好地支持免费和商业编译器。

我不知道这是否是一个历史事实，但Fortran感觉它是为并行/分布式/向量化/多核化而构建的。今天，当我们谈论速度时，它几乎是“标准度量”:“它能缩放吗?”

对于纯粹的cpu计算，我喜欢Fortran。对于任何与IO相关的东西，我发现使用c更容易(无论如何这两种情况都很困难)。

当然，对于并行计算密集型代码，你可能需要使用GPU。C和Fortran都有很多或多或少很好地集成了CUDA/OpenCL接口(现在还有OpenACC)。

我比较客观的回答是:如果你对这两种语言都同样了解或不了解，那么我认为Fortran更快，因为我发现用Fortran写并行/分布式代码比用c更容易(一旦你明白你可以写“自由形式”Fortran，而不仅仅是严格的F77代码)

Here is a 2nd answer for those willing to downvote me because they don't like the 1st answer : Both language have the features required to write high-performance code. So it's dependent of the algorithm you're implementing (cpu intensive ? io intensive ? memory intensive?), the hardware (single cpu ? multi-core ? distribute supercomputer ? GPGPU ? FPGA ?), your skill and ultimately the compiler itself. Both C and Fortran have awesome compiler. (i'm seriously amazed by how advanced Fortran compilers are but so are C compilers).

PS:我很高兴你特别排除了库，因为我有很多关于Fortran GUI库的不好的东西要说。：）

是的，在1980年;在2008年?取决于

当我开始专业编程时，Fortran的速度优势正受到挑战。我记得我在Dr. Dobbs上读到过这篇文章，并把这篇文章告诉了年长的程序员——他们都笑了。

所以我对此有两种观点，理论上的和实际的。从理论上讲，今天的Fortran与C/ c++甚至任何允许汇编代码的语言相比，并没有内在的优势。在实践中，今天的Fortran仍然享有围绕优化数值代码而建立的历史和文化遗产的好处。

Up until and including Fortran 77, language design considerations had optimization as a main focus. Due to the state of compiler theory and technology, this often meant restricting features and capability in order to give the compiler the best shot at optimizing the code. A good analogy is to think of Fortran 77 as a professional race car that sacrifices features for speed. These days compilers have gotten better across all languages and features for programmer productivity are more valued. However, there are still places where the people are mainly concerned with speed in scientific computing; these people most likely have inherited code, training and culture from people who themselves were Fortran programmers.

当人们开始谈论代码优化时，会有很多问题，了解这一点的最好方法是潜伏在那些工作是快速编写数字代码的人身上。但是请记住，这种高度敏感的代码通常只占整个代码行的一小部分，而且非常专门:许多Fortran代码就像其他语言中的许多其他代码一样“低效”，优化甚至不应该是此类代码的主要关注点。

要开始了解Fortran的历史和文化，维基百科是一个很好的地方。Fortran维基百科的条目是一流的，我非常感谢那些花时间和精力使它对Fortran社区有价值的人。

(这个答案的缩短版本本可以在Nils开始的优秀帖子中发表评论，但我没有这样做的业力。实际上，如果不是因为这个帖子有实际的信息内容和分享，而不是激烈的争吵和语言偏见，我可能根本不会写任何东西，这是我对这个主题的主要经验。我不知所措，不得不分享这份爱。)

我是一个业余程序员，在这两种语言上我都是“平均”。 我发现编写快速Fortran代码比编写C(或c++)代码更容易。Fortran和C都是“历史悠久”的语言(按照今天的标准)，被大量使用，并且很好地支持免费和商业编译器。

我不知道这是否是一个历史事实，但Fortran感觉它是为并行/分布式/向量化/多核化而构建的。今天，当我们谈论速度时，它几乎是“标准度量”:“它能缩放吗?”

对于纯粹的cpu计算，我喜欢Fortran。对于任何与IO相关的东西，我发现使用c更容易(无论如何这两种情况都很困难)。

当然，对于并行计算密集型代码，你可能需要使用GPU。C和Fortran都有很多或多或少很好地集成了CUDA/OpenCL接口(现在还有OpenACC)。

我比较客观的回答是:如果你对这两种语言都同样了解或不了解，那么我认为Fortran更快，因为我发现用Fortran写并行/分布式代码比用c更容易(一旦你明白你可以写“自由形式”Fortran，而不仅仅是严格的F77代码)

Here is a 2nd answer for those willing to downvote me because they don't like the 1st answer : Both language have the features required to write high-performance code. So it's dependent of the algorithm you're implementing (cpu intensive ? io intensive ? memory intensive?), the hardware (single cpu ? multi-core ? distribute supercomputer ? GPGPU ? FPGA ?), your skill and ultimately the compiler itself. Both C and Fortran have awesome compiler. (i'm seriously amazed by how advanced Fortran compilers are but so are C compilers).

PS:我很高兴你特别排除了库，因为我有很多关于Fortran GUI库的不好的东西要说。：）

Fortran traditionally doesn't set options such as -fp:strict (which ifort requires to enable some of the features in USE IEEE_arithmetic, a part of f2003 standard). Intel C++ also doesn't set -fp:strict as a default, but that is required for ERRNO handling, for example, and other C++ compilers don't make it convenient to turn off ERRNO or gain optimizations such as simd reduction. gcc and g++ have required me to set up Makefile to avoid using the dangerous combination -O3 -ffast-math -fopenmp -march=native. Other than these issues, this question about relative performance gets more nit-picky and dependent on local rules about choice of compilers and options.

大多数帖子已经提出了令人信服的论点，所以我只是在另一个方面加上众所周知的2美分。

在处理能力方面，fortran更快或更慢是有其重要性的，但如果用fortran开发一些东西需要5倍多的时间，因为:

it lacks any good library for tasks different from pure number crunching it lack any decent tool for documentation and unit testing it's a language with very low expressivity, skyrocketing the number of lines of code. it has a very poor handling of strings it has an inane amount of issues among different compilers and architectures driving you crazy. it has a very poor IO strategy (READ/WRITE of sequential files. Yes, random access files exist but did you ever see them used?) it does not encourage good development practices, modularization. effective lack of a fully standard, fully compliant opensource compiler (both gfortran and g95 do not support everything) very poor interoperability with C (mangling: one underscore, two underscores, no underscore, in general one underscore but two if there's another underscore. and just let not delve into COMMON blocks...)

那么这个问题就无关紧要了。如果某样东西很慢，大多数时候你无法在给定的限制范围内改进它。如果你想要更快，改变算法。最后，使用电脑的时间很便宜。人类的时间不是。珍惜减少人类时间的选择。如果它增加了使用电脑的时间，无论如何它都是有成本效益的。

Fortran和C之间的速度差异更多的是编译器优化和特定编译器使用的底层数学库的函数。Fortran没有什么固有的特性可以使它比C更快。

不管怎样，一个优秀的程序员可以用任何语言编写Fortran。