我们已经开发了一个流程，将负载和性能测量视为头等重要的问题——正如你所说，把它留到项目的最后往往会导致失望……

因此，在开发过程中，我们包括非常基本的多用户测试(使用selenium)，它检查基本的疯狂问题，如中断的会话管理、明显的并发问题和明显的资源争用问题。重要的项目在持续集成过程中包含了这一点，所以我们得到了非常定期的反馈。

对于没有极端性能要求的项目，我们在测试中包含基本性能测试;通常，我们使用BadBoy编写测试脚本，并将它们导入JMeter，替换登录细节和其他线程特定的东西。然后我们将这些数据提升到服务器每秒处理100个请求的水平;如果响应时间小于1秒，通常就足够了。我们出发，继续我们的生活。

For projects with extreme performance requirements, we still use BadBoy and JMeter, but put a lot of energy into understanding the bottlenecks on the servers on our test rig(web and database servers, usually). There's a good tool for analyzing Microsoft event logs which helps a lot with this. We typically find unexpected bottlenecks, which we optimize if possible; that gives us an application that is as fast as it can be on "1 web server, 1 database server". We then usually deploy to our target infrastructure, and use one of the "Jmeter in the cloud" services to re-run the tests at scale.

同样，PAL报告有助于分析测试期间发生了什么—您经常会在生产环境中看到非常不同的瓶颈。

关键是要确保不只是运行压力测试，还要收集了解应用程序性能所需的信息。

此外，还有一个很棒的开源纯python分布式和可伸缩的locust框架，它使用了greenlets。它很擅长模拟大量同时使用的用户。

我用过Grinder。它是开源的，非常容易使用，并且非常可配置。它是基于Java的，脚本使用Jython。我们在一个。net web应用程序上运行了它，所以不要认为它只是一个Java工具(从本质上讲，任何web压力工具都不应该与它所使用的平台绑定)。

We did some neat stuff with it... we were a web based telecom application, so one cool use I set up was to mimick dialing a number through our web application, then used an auto answer tool we had (which was basically a tutorial app from Microsoft to connect to their RTC LCS server... which is what Microsoft Office Communicator connects to on a local network... then modified to just pick up calls automatically). This then allowed us to use this instead of an expensive telephony tool called The Hammer (or something like that).

无论如何，我们还使用该工具来查看应用程序在高负载下的运行情况，它在查找瓶颈方面非常有效。该工具内置了报告，以显示请求花费的时间，但我们从未使用过它。日志还可以存储所有响应或自定义日志。

我强烈推荐这个工具，非常有用的价格…但是期望用它做一些自定义设置(它有一个内置的代理来记录脚本，但它可能需要自定义来捕获会话之类的东西……我知道我必须自定义它以利用每个线程的唯一会话)。

Visual Studio测试版2010(2008年也不错)。这是一个非常简单和强大的工具来创建web/负载测试。

在Windows服务器上使用此工具的好处是，您可以在报告中集成访问所有perfmon服务器统计信息。真的有用。

另一个好处是，在Visual Studio项目中，你可以集成一个“性能会话”来分析你网站的代码执行情况。

如果你在windows服务器上提供网页服务，这是最好的工具。

然而，使用多台机器来加载测试应用程序需要一个单独且昂贵的许可证。

这是给JMeter的另一票。

JMeter是一个开源的负载测试工具，用Java编写。它能够测试许多不同的服务器类型(例如，web, web服务，数据库，基本上使用请求的任何东西)。

然而，一旦你开始面对复杂的测试，它确实有一个陡峭的学习曲线，但它是非常值得的。您可以非常快速地启动并运行，这取决于您想要进行哪种类型的压力测试，这可能没问题。

优点:

Open-Source/Free tool from the Apache project (helps with buy-in) Easy to get started with, and easy to use once you grasp the core concepts. (Ie, how to create a request, how to create an assertion, how to work with variables etc). Very scalable. I've run tests with 11 machines generating load on the server to the tune of almost a million hits/hour. It was much easier to setup than I was expecting. Has an active community and good resources to help you get up and running. Read the tutorials first and play with it for a while.

缺点:

The UI is written in Swing. (ugh!) JMeter works by parsing the response text returned by the server. So if you're looking to validate any sort of javascript behaviours, you're out of luck. Learning curve is steep for non-programmers. If you're familiar with regular expressions, you're already ahead of the game. There are large numbers of (insert expletive) idiots in the support forum asking stupid questions that could be easily solved if they'd give the documentation even a cursory glance. ('How do I use JMeter to stress-test my Windows GUI' shows up quite frequently). Reporting 'out of the box' leaves much to be desired, particularly for larger tests. In the test I mentioned above, I ended up having to write a quick console app to do some of the 'xml-logfile' to 'html' conversions. That was a few years ago though, so it's probable that this would no longer be required.

冒着被指责为无耻的自我推销的风险，我想指出，在我寻求免费负载测试工具的过程中，我访问了这篇文章:http://www.devcurry.com/2010/07/10-free-tools-to-loadstress-test-your.html

要么我无法获得我想要的吞吐量，要么我无法获得我想要的灵活性。并且我想在测试后分析中轻松地聚合多个负载测试生成主机的结果。

我尝试了清单上的每一种工具，但令我沮丧的是，它们没有一种完全符合我的要求。所以我做了一个，并分享它。

这里是:http://sourceforge.net/projects/loadmonger

PS:熟悉城市俚语的人不会对这个名字做出恶意评论。我以前不是，但现在更世故了。