How much of the content in those sites change as fast as Twitter does? Mainly static content can be displayed using about any framework/language. Moreso when yo

How much of the content in those sites change as fast as Twitter does? Mainly static content can be displayed using about any framework/language. Moreso when you include caching. I don’t think Rails was simply a good choice for the workload Twitter needed to support (not that they knew it at the time).