performance - 编程语言的速度对 Web 应用程序重要吗？

Question

我在互联网上看到了很多 PHP、Python、Ruby 等之间的基准测试。 Ruby 因超慢而受到很多批评，这导致开发人员出于“性能原因”拒绝将其用于 Web 开发。但是解释器的性能对于 Web 应用程序真的很重要吗？无论如何，瓶颈不是 99% 都位于数据库中吗？那么为什么每个人都吓坏了？

注意:我意识到在某些边缘情况下，例如某些数学/科学 Web 应用程序，性能很重要，但我不是在谈论这些；我说的是你的普通社交网络、Stack Overflows 等。

Answer 1

应该让你在角落里瑟瑟发抖的是，amazon.com 和 google.com 进行的多项研究发现，页面加载时间减少 < 1 秒对他们的转化率和利润产生了显着的(对他们而言)影响。

因此，即使对于小型站点，性能也很重要。问题是这有多重要。当你每天做 100 个唯一身份时，失去 0.1% 的销售额并不重要，但是当你做 1000 万个时，突然间这 0.1% 会花费你很多钱。

Even small changes in response times can have significant effects. Google found that moving from a 10-result page loading in 0.4 seconds to a 30-result page loading in 0.9 seconds decreased traffic and ad revenues by 20% (Linden 2006). When the home page of Google Maps was reduced from 100KB to 70-80KB, traffic went up 10% in the first week, and an additional 25% in the following three weeks (Farber 2006). Tests at Amazon revealed similar results: every 100 ms increase in load time of Amazon.com decreased sales by 1% (Kohavi and Longbotham 2007). Experiments at Microsoft on Live Search showed that when search results pages were slowed by 1 second: (Kohavi 2007)

* Queries per user declined by 1.0%, and
* Ad clicks per user declined by 1.5%

After slowing the search results page by 2 seconds:

* Queries per user declined by 2.5%, and
* Ad clicks per user declined by 4.4%

http://www.websiteoptimization.com/speed/tweak/psychology-web-performance/